What are Circuit Protection ?
Circuit Protection refers to components designed to prevent damage to electrical circuits from overcurrent, voltage spikes, and other electrical anomalies. They are commonly used in applications such as production electronics assembly and maintenance. Important specifications include voltage rating, current rating, and response time; these attributes are critical for ensuring compatibility with existing designs and maintaining system performance. Additionally, validating lifecycle status is essential for procurement teams to ensure reliable sourcing.
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Compare stocked parts across manufacturers and distributors, then add lines to your RFQ.
| Part & Mfr | Total Stock | Pricing & RFQ | |
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Diodes Incorporated
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31,020
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Price on request
31,020
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STMicroelectronics
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31,020
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Price on request
31,020
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STMicroelectronics
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31,000
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Price on request
31,000
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Littelfuse Inc.
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30,937
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Price on request
30,937
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Vishay Dale
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30,821
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Price on request
30,821
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Vishay Dale
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30,800
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Price on request
30,800
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Murata
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30,720
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Price on request
30,720
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Diodes Incorporated
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30,683
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Price on request
30,683
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Diodes Incorporated
<p>The D5V0L1B2LP3-7 is a bidirectional TVS (Transient Voltage Suppression) diode from Diodes Incorporated, designed to protect sensitive electronics from electrostatic discharge (ESD) and other voltage transients. It features a clamping voltage of 14V and can handle peak pulse currents up to 6A under an 8/20µs waveform, with a peak pulse power rating of 84W. The device provides robust ESD protection per IEC 61000-4-2, with ±30kV contact and ±30kV air discharge ratings. Its low typical capacitance of 15pF at 1MHz makes it suitable for high-speed signal lines. This diode is packaged in an ultra-small, low-profile X3-DFN0603-2 (0201 metric) surface mount package, measuring 0.6mm x 0.3mm x 0.3mm. It operates over a wide temperature range of -65°C to 150°C and is commonly used in cellular handsets, portable electronics, communication systems, computers, and peripherals. The part is lead-free, RoHS compliant, and halogen-free.</p>
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30,571
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Price on request
30,571
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Comchip Technology
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30,534
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Price on request
30,534
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Littelfuse Inc.
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30,483
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Price on request
30,483
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STMicroelectronics
<p>The DSL03-010SC6 is a TVS (Transient Voltage Suppression) diode from STMicroelectronics. It is packaged in a SOT23-6 surface-mount package. The component is RoHS3 compliant, has a moisture sensitivity level of 1 (unlimited), and is REACH unaffected. These attributes make it suitable for use in environments requiring lead-free and environmentally compliant components.</p>
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30,465
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Price on request
30,465
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On Semiconductor
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30,434
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Price on request
30,434
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STMicroelectronics
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30,400
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Price on request
30,400
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Texas Instruments
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30,392
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Price on request
30,392
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Littelfuse Inc.
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30,315
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Price on request
30,315
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Bourns
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30,300
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Price on request
30,300
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On Semiconductor
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30,267
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Price on request
30,267
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On Semiconductor
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30,260
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Price on request
30,260
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Bel Fuse
<p>The Bel Fuse 0679L0375-05 is a surface mount fuse from the 0679L series, featuring a fast blow (quick acting) response. It is rated for 375mA at 125VAC and 125VDC, with a breaking capacity of 50A AC and 300A DC.</p><p> </p><p>Electrical characteristics: cold resistance of 0.32 ohms, maximum voltage drop of 0.48V at rated current, power dissipation of 0.18W, and melting I²t of 0.04 A²s at 10ms. Operating temperature range is -55°C to 125°C.</p><p> </p><p>The fuse is housed in a 2-SMD square end block package (2410 size), measuring 6.10mm x 2.54mm x 2.79mm. It features a ceramic body with silver, gold, or palladium plated terminations. Compatible with high-temperature Pb-free soldering and supplied in tape and reel for automated assembly.</p><p> </p><p>This fuse is AEC-Q200 qualified and carries cURus safety agency approvals. It is RoHS compliant, halogen-free, and REACH unaffected. Typical applications include notebook computers, LCD monitors, power supplies, industrial equipment, and medical devices.</p>
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30,198
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Price on request
30,198
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On Semiconductor
<p>The 1SMA9.0AT3G is a Zener-type transient voltage suppression (TVS) diode designed for general purpose circuit protection. It features a reverse standoff voltage of 9V and a clamping voltage of 15.4V, capable of handling 400W peak pulse power (10/1000μs waveform) and 26A peak pulse current. The device has a capacitance of 1200pF at 1MHz and is not intended for power line protection. It is a unidirectional TVS with one channel.</p><p> </p><p>The 1SMA9.0AT3G is housed in a 6-WDFN exposed pad package (6-TDFN-EP 3x3mm) and is surface mountable. It operates over a temperature range of -65°C to 150°C. This component is suitable for protecting sensitive electronics from voltage transients in various applications.</p>
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30,170
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Price on request
30,170
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Vishay Dale
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30,057
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Price on request
30,057
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STMicroelectronics
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30,040
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Price on request
30,040
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Bel Fuse
<p>The Bel Fuse 0679H1500-05 is a quick-acting surface mount fuse from the 0679H series, designed for overcurrent protection in a wide range of electronic equipment. It is rated for 1.5A continuous current with a voltage rating of 350VAC and 72VDC. The fuse offers a breaking capacity of 50A AC and 100A DC, ensuring reliable interruption under fault conditions.</p><p> </p><p>This fuse features a fast blow response time, making it suitable for protecting sensitive circuits where rapid overcurrent clearing is required. The ceramic body with silver plated end caps provides robust mechanical and thermal performance, and the component is halogen free with an MSL of 1. It is AEC-Q qualified, meeting automotive reliability standards.</p><p> </p><p>The 0679H1500-05 is supplied in a 2-SMD, square end block package (2410 size) and is compatible with 260°C lead-free soldering processes. It is fully RoHS3 compliant with exemption 7(a) and carries cURus and IEC safety agency approvals.</p>
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30,000
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Price on request
30,000
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Littelfuse Inc.
<p>1SMA8.5AT3G is a 400W unidirectional TVS diode manufactured by Littelfuse. It is designed to protect sensitive electronic circuits from voltage transients induced by lightning, ESD, and other surge events. The device features a reverse standoff voltage of 8.5V and a clamping voltage of 14.4V, ensuring that downstream components are shielded from overvoltage conditions.</p><p> </p><p>With a peak pulse current rating of 27.8A, this TVS diode can handle significant surge energy. The junction capacitance is 1265pF at 1MHz, which should be considered for high-speed signal lines. The device is not intended for power line protection, as indicated by its general purpose application classification.</p><p> </p><p>The 1SMA8.5AT3G is housed in a surface mount DO-214AC (SMA) package, which is suitable for automated assembly and space-constrained designs. It operates over a wide temperature range of -65°C to 150°C, making it robust for harsh environments. The part is RoHS and REACH compliant (unverified) and has an MSL rating of 1 (unlimited).</p>
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30,000
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Price on request
30,000
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On Semiconductor
<p>The 1SMA64AT3G is a 400W peak power Zener transient voltage suppressor diode from the 1SMA5.0AT3 series by On Semiconductor. Designed to protect voltage-sensitive components from high-voltage, high-energy transients, this unidirectional device offers excellent clamping capability and fast response.</p><p> </p><p>Key electrical specifications include a working peak reverse voltage of 64 V, a nominal breakdown voltage of 71 V, and a maximum clamping voltage of 103 V. With a peak pulse current rating of 3.9 A (derived from 400 W peak power at 1 ms pulse width) and a forward surge current capability of 40 A, the diode is suited for robust transient protection. The device also features an ESD rating of Class 3 (>16 kV) per the Human Body Model and a response time of less than 1 ns.</p><p> </p><p>The 1SMA64AT3G is housed in a surface-mount DO-214AC (SMA) package, supporting standard reflow soldering. It operates over a junction temperature range of -65°C to 150°C and is supplied in tape and reel packaging with a standard quantity of 5000 pieces. The part is RoHS3 compliant and MSL 1 rated.</p>
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30,000
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Price on request
30,000
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Littelfuse Inc.
<p>The 1SMA58AT3G is a unidirectional TVS diode from Littelfuse designed to protect sensitive electronic circuits from high voltage transients. It features a working peak reverse voltage of 58V and a clamping voltage of 93.6V, with a peak pulse current rating of 4.3A. The device can dissipate up to 400W of peak power (1ms pulse).</p><p> </p><p>This TVS diode is housed in a standard DO-214AC (SMA) surface mount package, suitable for automated assembly. It operates over a wide temperature range from -65°C to 150°C. The component is intended for general purpose applications and is not designed for power line protection.</p><p> </p><p>With a capacitance of 225pF at 1MHz, the 1SMA58AT3G is suitable for protecting signal lines in various electronic systems. The part is part of the 1SMA10CAT3G series from Littelfuse.</p>
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30,000
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Price on request
30,000
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On Semiconductor
<p>The 1SMA7.0AT3G is a 400W peak power transient voltage suppressor (TVS) diode from ON Semiconductor. It is designed to protect sensitive electronic circuits from high voltage transients. This unidirectional device has a working peak reverse voltage of 7V and a maximum clamping voltage of 12V at 33.3A peak pulse current. It features a fast response time of less than 1 ns and an ESD rating of Class 3 (>16 kV) per Human Body Model. The device is housed in a DO-214AC (SMA) surface mount package, suitable for automated assembly. Typical applications include communication systems, automotive electronics, power supplies, and industrial controls. The part is available in tape and reel packaging with a standard quantity of 5000 units.</p>
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30,000
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Price on request
30,000
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Littelfuse Inc.
<p>The 1SMA16AT3G is a unidirectional TVS diode from Littelfuse designed for general purpose transient voltage suppression. It offers a peak pulse power dissipation of 400W (10/1000μs waveform) with a peak pulse current rating of 15.4A. The device has a reverse standoff voltage of 16V and a clamping voltage of 26V, making it suitable for protecting sensitive electronics from voltage spikes. Capacitance is 715pF at 1MHz. The operating temperature range is -65°C to 150°C (junction).</p><p> </p><p>This TVS diode is packaged in a DO-214AC (SMA) surface mount package, enabling compact PCB layouts. It is RoHS3 compliant and has a moisture sensitivity level of 1 (unlimited). The part is intended for general purpose applications and is not designed for power line protection. For detailed design guidance, refer to the manufacturer's datasheet.</p><p> </p><p>Note that this part is a single-channel unidirectional device. It is not recommended for use in applications requiring bidirectional protection. The absence of a linked datasheet may require verification of exact electrical characteristics and thermal performance.</p>
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30,000
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Price on request
30,000
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Littelfuse Inc.
<p>The 1SMA10AT3G is a unidirectional TVS diode from Littelfuse designed for general-purpose circuit protection. It features a reverse standoff voltage of 10V and a clamping voltage of 17V, providing protection against transient overvoltage events. With a peak pulse power rating of 400W and a peak pulse current of 23.5A, this diode can absorb significant surge energy. The device has a capacitance of 1090pF at 1MHz and operates over a temperature range of -65°C to 150°C. It is packaged in a surface-mount DO-214AC (SMA) case, suitable for automated pick-and-place assembly. This TVS diode is unidirectional and not intended for power line protection. Typical applications include general-purpose circuit protection in consumer and industrial electronics.</p>
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30,000
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Price on request
30,000
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STMicroelectronics
<p>The BZW06-28B is a bidirectional transient voltage suppression (TVS) diode designed for over-voltage and ESD protection in general purpose applications. It features a reverse stand-off voltage of 28.2 V, a maximum clamping voltage of 59 V, and can handle peak pulse currents up to 68 A (8/20 µs waveform). The device is rated for a peak pulse power dissipation of 600 W (10/1000 µs waveform) and a steady state power dissipation of 5 W at 75°C.</p><p> </p><p>This TVS diode offers very fast response time and is suitable for protecting sensitive electronics from voltage spikes. It has a typical capacitance of 500 pF at 1 MHz. The junction temperature range is -50 to +175°C, with an operating temperature up to 150°C. The device is RoHS, REACH, and Conflict Minerals compliant (per datasheet), and the case material meets UL 94V-0 flammability rating.</p><p> </p><p>The BZW06-28B is packaged in a DO-15 (DO-204AC) axial leaded through-hole package, weighing approximately 0.4 g. It is available in bidirectional configuration (indicated by suffix B). The mounting type is through-hole with axial leads, suitable for traditional PCB assembly.</p>
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30,000
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Price on request
30,000
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Vishay Dale
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30,000
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Price on request
30,000
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Littelfuse Inc.
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30,000
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Price on request
30,000
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On Semiconductor
<p>The 1SMA75AT3G is a unidirectional transient voltage suppressor diode from ON Semiconductor, part of the 1SMA5.0AT3 series. It is designed to protect sensitive electronic circuits from high voltage transients and ESD events. With a working peak reverse voltage of 75V and a clamping voltage of 121V, it provides robust protection for 75V-rated lines. The device can handle 400W peak pulse power (1ms) and 3.3A peak pulse current.</p><p> </p><p>This TVS diode features a fast response time of less than 1 ns and an ESD rating of over 16 kV (Human Body Model), making it suitable for high-speed data lines and I/O protection. The low capacitance of 180 pF at 1 MHz minimizes signal degradation in high-frequency applications.</p><p> </p><p>Housed in a standard DO-214AC (SMA) surface-mount package, the 1SMA75AT3G is optimized for automated assembly. It operates over a wide temperature range from -65°C to 150°C. The device is available in tape and reel packaging with 5000 pieces per reel. The Pb-Free (G suffix) version ensures environmental compliance.</p>
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30,000
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Price on request
30,000
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STMicroelectronics
<p>The ESDAVLC5-4BX4 is a steering (rail-to-rail) TVS diode manufactured by STMicroelectronics. It integrates four unidirectional channels designed for general-purpose ESD protection. The device provides a typical reverse standoff voltage of 3V and a maximum clamping voltage of 18V at a peak pulse current of 1A (8/20 µs). With a peak pulse power rating of 30W, it offers robust protection for sensitive circuits.</p><p> </p><p>The diode is housed in a surface mount 4-Micro-X package, which is suitable for space-constrained PCB designs. The operating temperature range spans -30°C to 85°C, making it suitable for consumer and industrial environments. Note that this device does not provide power line protection; it is intended for signal line ESD applications.</p><p> </p><p>Design engineers should consider the low clamping voltage and fast response time typical of steering diodes for high-speed data lines. The 4-channel configuration allows protection of multiple signal lines in a single package, reducing component count and board area.</p>
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30,000
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Price on request
30,000
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Bourns
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30,000
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Price on request
30,000
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Littelfuse Inc.
<p>The 1SMA40AT3G is a unidirectional TVS (transient voltage suppression) diode from Littelfuse Inc., designed to protect sensitive electronic circuits from high voltage transients. It features a working peak reverse voltage of 40V and a clamping voltage of 64.5V, with a peak pulse power dissipation of 400W (1ms pulse). The device can handle a peak pulse current of 6.2A and has a capacitance of 315pF at 1MHz.</p><p> </p><p>This TVS diode is housed in a surface-mount DO-214AC (SMA) package, suitable for automated assembly. It operates over a wide temperature range of -65°C to 150°C. The part is intended for general-purpose applications and does not include power line protection.</p><p> </p><p>Design engineers should note that the datasheet provided for this part number is incorrect (references the 1SMA10CAT3G series). Key electrical parameters such as breakdown voltage, reverse leakage current, and test current are not available from the current data sources. Verification of specifications from the manufacturer is recommended.</p>
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30,000
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Price on request
30,000
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STMicroelectronics
<p>The ESDA14V2-2BF3 is a Zener-type TVS diode from STMicroelectronics designed for general purpose circuit protection. It features a reverse standoff voltage of 12V and a peak pulse power rating of 50W. The device incorporates 2 bidirectional channels for protecting two signal lines.</p><p> </p><p>This TVS diode is surface mountable and packaged in a 4-WFBGA, FCBGA case, specifically a 4-FlipChip (0.77x0.77) supplier package. It operates over a temperature range of -40°C to 125°C. The component is RoHS3 compliant and REACH unaffected.</p><p> </p><p>The diode is suitable for applications requiring low voltage transient suppression. Its compact flip-chip package makes it ideal for space-constrained designs. The 12V standoff voltage allows use in 12V systems for protecting against electrostatic discharge and other voltage transients.</p>
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30,000
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Price on request
30,000
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On Semiconductor
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30,000
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Price on request
30,000
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On Semiconductor
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30,000
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Price on request
30,000
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Vishay Dale
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30,000
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Price on request
30,000
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On Semiconductor
<p>The 1SMA51AT3G from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode from the 1SMA5.0AT3 series. It is designed to protect voltage-sensitive components from high-voltage, high-energy transients. The device offers a working peak reverse voltage of 51 V and a clamping voltage of 82.4 V.</p><p> </p><p>Key electrical specifications include a peak power dissipation of 400 W at 1 ms pulse width, a typical response time of less than 1 ns, and an ESD rating of Class 3 (>16 kV) per Human Body Model. The diode has a capacitance of 250 pF at 1 MHz and can handle a forward surge current of 40 A.</p><p> </p><p>The device is housed in a void-free, transfer-molded plastic SMA (DO-214AC) package, suitable for surface mount assembly. It supports operating junction temperatures from -65°C to 150°C and has a moisture sensitivity level of 1 (unlimited). This Pb-free variant (suffix G) is RoHS and REACH compliant.</p>
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30,000
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Price on request
30,000
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Vishay Dale
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30,000
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Price on request
30,000
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Bel Fuse
<p>The Bel Fuse 0685P9120-01 is a fast acting surface mount chip fuse from the 0685P series, designed for overcurrent protection in compact electronic assemblies. It is rated for 12A continuous current at 50V DC and features a fast blow response time.</p><p> </p><p>The fuse is housed in a standard 1206 (3216 Metric) package with dimensions of 3.20mm x 1.58mm x 0.63mm, making it suitable for automated SMD assembly processes. It is compatible with lead-free reflow soldering and is supplied on tape and reel for pick-and-place equipment.</p><p> </p><p>The 0685P series is AEC-Q200 qualified and carries cURus and CE safety approvals. The fuse is RoHS compliant, halogen free, and lead free. It has an operating temperature range of -55°C to 125°C and a breaking capacity of 150A at 50V DC.</p>
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30,000
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Price on request
30,000
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Littelfuse Inc.
<p>This 1SMA24AT3G is a unidirectional TVS (transient voltage suppression) diode manufactured by Littelfuse. It is designed to protect sensitive electronics from voltage transients by clamping the voltage at 38.9V during a surge event.</p><p> </p><p>The diode features a reverse standoff voltage of 24V, making it suitable for 24V systems. With a peak pulse power rating of 400W (10/1000µs waveform) and a peak pulse current of 10.3A, it can handle moderate transient events. The capacitance is 500pF at 1MHz.</p><p> </p><p>The device is housed in a DO-214AC (SMA) surface-mount package and operates over a temperature range of -65°C to 150°C. It supports unidirectional protection for general-purpose applications.</p>
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30,000
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Price on request
30,000
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On Semiconductor
<p>The 1SMA48AT3G is a unidirectional Zener TVS diode from On Semiconductor, designed for general purpose transient voltage suppression. It offers a reverse standoff voltage of 48V and a clamping voltage of 77.4V, with a peak pulse power rating of 400W. The device is housed in a DO-214AC (SMA) surface mount package, suitable for automated assembly. It operates over a junction temperature range of -65°C to 150°C. The part has a capacitance of 265pF at 1MHz.</p>
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30,000
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Price on request
30,000
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On Semiconductor
<p>The 1SMA8.0AT3G is a Zener-type transient voltage suppression (TVS) diode designed to protect sensitive electronics from voltage transients. It features a reverse standoff voltage of 8 V and a clamping voltage of 13.6 V, ensuring that downstream components are not exposed to damaging overvoltage conditions.</p><p> </p><p>This device can handle a peak pulse current of 29.4 A and a peak pulse power of 400 W, making it suitable for general-purpose circuit protection in a variety of applications. The diode is unidirectional with one channel, and it has a capacitance of 1035 pF at 1 MHz.</p><p> </p><p>The 1SMA8.0AT3G is offered in a surface-mount 6-WDFN exposed pad package (supplier package 6-TDFN-EP 3x3 mm), which facilitates compact PCB layouts and efficient heat dissipation. It operates over a junction temperature range of -65°C to 150°C.</p>
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30,000
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Price on request
30,000
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Littelfuse Inc.
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30,000
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Price on request
30,000
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STMicroelectronics
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30,000
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Price on request
30,000
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Littelfuse Inc.
<p>The 1SMA28AT3G is a unidirectional TVS diode from Littelfuse Inc., designed to protect sensitive electronic circuits from high voltage transients. It features a working reverse voltage of 28V and a clamping voltage of 45.4V, with a peak pulse current rating of 8.8A. The device can dissipate up to 400W of peak power (1ms pulse).</p><p> </p><p>This TVS diode offers a fast response time typically less than 1ns and is rated for ESD protection (Class 3, >16kV per Human Body Model). It has a capacitance of 430pF at 1MHz and operates over a temperature range of -65°C to 150°C.</p><p> </p><p>The 1SMA28AT3G is supplied in a surface mount DO-214AC (SMA) package, suitable for automated assembly. It is Pb-free and RoHS compliant (unverified). Typical applications include communication systems, automotive electronics, power supplies, and industrial controls.</p>
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30,000
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Price on request
30,000
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