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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| Part & Mfr | Total Stock | Pricing & RFQ | |
|---|---|---|---|
Littelfuse Inc.
<p>The Littelfuse 0402SFF400F/24-2 is a fast-acting chip fuse designed for overcurrent protection in DC power systems up to 24VDC. It is rated at 4A with a breaking capacity of 35A. The fuse features a monolithic multilayer design that provides high current capability in a small footprint and helps reduce aging effects for improved reliability.</p><p> </p><p>This fuse has a nominal cold DCR of 0.014Ω and a melting I²t of 0.225 A²sec. It operates over a temperature range of -55°C to +125°C and is UL approved. The component is lead-free, RoHS compliant, and halogen free.</p><p> </p><p>The component is supplied in an 0402 (1005 metric) surface mount package measuring 1.00mm x 0.51mm x 0.51mm, making it suitable for space-constrained designs in portable electronics, laptops, and other consumer devices.</p>
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430,007
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Price on request
430,007
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Nexperia USA Inc.
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427,020
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Price on request
427,020
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On Semiconductor
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426,920
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Price on request
426,920
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Vishay Dale
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426,184
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Price on request
426,184
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On Semiconductor
<p>The ESD7371XV2T5G is a unidirectional Zener TVS diode from onsemi designed to protect voltage-sensitive components from electrostatic discharge (ESD) and transient voltage events. It features a reverse standoff voltage of 5.3V and a clamping voltage of 20V at a peak pulse current of 3A. The device delivers 35W of peak pulse power and has an ultra-low capacitance of 0.43pF at 1MHz, making it suitable for high-speed signal lines.</p><p> </p><p>This TVS diode provides ±20kV ESD protection per IEC 61000-4-2 (contact and air discharge) and has a maximum leakage current of less than 1 nA at the standoff voltage. It is housed in a surface-mount SOD-523 package (SC-79) and operates over a junction temperature range of -55°C to 150°C. The part is RoHS3 compliant, lead-free, and halogen-free.</p><p> </p><p>Typical applications include ESD protection for RF signals, antenna lines, USB 2.0 and USB 3.0 interfaces, and near-field communications. Its low capacitance and high linearity make it ideal for RF switching and power amplifier circuits where signal integrity is critical.</p>
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424,000
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Price on request
424,000
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On Semiconductor
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423,390
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Price on request
423,390
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STMicroelectronics
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417,294
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Price on request
417,294
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Bourns
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414,045
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Price on request
414,045
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Nexperia USA Inc.
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412,020
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Price on request
412,020
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Diodes Incorporated
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411,508
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Price on request
411,508
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STMicroelectronics
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410,000
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Price on request
410,000
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STMicroelectronics
<p>The ESDA14V2BP6 is a Zener-type transient voltage suppression (TVS) diode designed for general-purpose circuit protection. It provides a reverse standoff voltage of 12 V and can handle a peak pulse power of 50 W. The device integrates 4 bidirectional channels, making it suitable for protecting multiple signal or power lines in a compact footprint.</p><p> </p><p>This TVS diode is housed in a surface-mount SOT-563 or SOT-666 package, with the supplier device package specified as SOT-666. It supports an operating temperature range of -40°C to 150°C (junction temperature). The component does not include power line protection and is intended for general-purpose applications where transient overvoltage clamping is required.</p><p> </p><p>The ESDA14V2BP6 is RoHS3 compliant and has an MSL rating of 1 (unlimited). It is commonly used in consumer electronics, industrial controls, and communication interfaces to safeguard sensitive circuitry from electrostatic discharge (ESD) and other voltage transients.</p>
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409,740
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Price on request
409,740
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Nexperia USA Inc.
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408,025
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Price on request
408,025
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Bourns
<p>The Bourns CDSOT236-0504LC is a steering (rail-to-rail) TVS diode array designed for ESD, EFT, and surge protection on high-speed data ports. It features four unidirectional channels and one VDD line, meeting IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (Surge) requirements.</p><p> </p><p>Key electrical specifications include a maximum reverse standoff voltage of 5 V, minimum breakdown voltage of 6 V at 1 mA, and typical clamping voltage of 8.1 V. The device offers low channel input capacitance of 0.55 pF typical (0.65 pF max) and channel-to-channel capacitance of 0.06 pF, making it suitable for high-speed interfaces such as HDMI 1.4, USB 3.0, and USB OTG.</p><p> </p><p>The device is housed in a SOT-23-6 surface mount package and supports an operating temperature range of -55°C to +85°C. It is RoHS compliant and provides ESD protection up to 30 kV (air and contact) on VCC to GND and 19 kV (air) / 12 kV (contact) on I/O pins.</p>
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406,418
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Price on request
406,418
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Diodes Incorporated
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405,120
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Price on request
405,120
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Diodes Incorporated
<p>The DESD3V3S1BL-7B is a bidirectional TVS diode manufactured by Diodes Incorporated. It provides transient voltage suppression for protecting sensitive electronic circuits from ESD and other voltage surges. The device features a reverse standoff voltage of 3.3V and a maximum clamping voltage of 7V at a peak pulse current of 5A (8/20µs waveform). It offers ESD protection per IEC 61000-4-2 of ±25kV contact discharge and ±30kV air discharge. The diode has a low typical capacitance of 10pF at 1MHz, making it suitable for high-speed signal lines. The device is designed for general-purpose applications such as cellular handsets, portable electronics, communication systems, and computers. It is packaged in an ultra-small X1-DFN1006-2 surface-mount package with a maximum height of 0.53mm, ideal for space-constrained designs. The package is lead-free, RoHS compliant, and halogen-free. The operating temperature range is -65°C to 150°C. The diode is rated for a peak pulse power of 35W (8/20µs).</p>
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405,017
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Price on request
405,017
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Vishay Dale
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403,767
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Price on request
403,767
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On Semiconductor
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403,384
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Price on request
403,384
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Vishay Dale
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403,020
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Price on request
403,020
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Murata
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400,072
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Price on request
400,072
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Nexperia USA Inc.
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400,020
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Price on request
400,020
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Bel Fuse
<p>This is a Bel Fuse C2Q 5 board mount fuse, part of the C2Q series. It is a very fast-acting chip fuse rated for 5A at 32VAC/VDC with an interrupting rating of 50A. The fuse is designed for surface mount applications in a compact 0603 (1608 metric) package.</p><p> </p><p>Electrical characteristics include a nominal cold resistance of 0.019 ohms, voltage drop of 0.131V at rated current, melting I²t of 0.055 A²s, and power dissipation of 0.66W. It operates over a temperature range of -55°C to 125°C.</p><p> </p><p>The fuse is RoHS3 compliant, lead-free, halogen-free, and has MSL 1 (unlimited). It is approved by CE and cURus. Typical applications include notebook computers, LCD monitors, power supplies, and industrial equipment.</p>
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400,000
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Price on request
400,000
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On Semiconductor
<p>The ESDM1051MX4T5G is a bidirectional TVS diode designed for ESD protection in space-constrained applications. It provides ±30kV contact and air discharge protection per IEC 61000-4-2, exceeding Level 4 requirements. The device features a reverse working voltage of 5.5V, a typical breakdown voltage of 6.8V (6.1V min, 8.2V max at 1mA), and a low clamping voltage of 7.5V typical at 8A pulse current. Reverse leakage current is limited to 0.1µA at 5.5V.</p><p> </p><p>With a typical junction capacitance of 22pF (25pF max at 1MHz), this diode is suitable for high-speed data lines without significant signal degradation. The dynamic resistance is 0.11Ω typical, ensuring fast response to ESD events. It can handle peak pulse currents up to 13A max (8/20µs waveform).</p><p> </p><p>The device comes in an ultra-compact 01005 (0.445 x 0.240 mm) X4DFN2 package with a low profile, making it ideal for smartphones, smartwatches, and other portable/wearable electronics where board space is at a premium. Mounting type is surface mount, and it is supplied in tape and reel packaging (10,000 pcs per reel).</p><p> </p><p>The ESDM1051MX4T5G is Pb-free, Halogen Free/BFR Free, and RoHS3 compliant. Operating temperature range is -55°C to 125°C.</p>
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399,077
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Price on request
399,077
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Renesas
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399,000
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Price on request
399,000
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Nexperia USA Inc.
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397,620
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Price on request
397,620
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Semtech
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396,876
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Price on request
396,876
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On Semiconductor
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390,794
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Price on request
390,794
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Vishay Dale
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389,246
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Price on request
389,246
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STMicroelectronics
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384,551
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Price on request
384,551
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STMicroelectronics
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384,000
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Price on request
384,000
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Diodes Incorporated
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382,020
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Price on request
382,020
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On Semiconductor
<p>The ESD7371XV2T1G is a unidirectional TVS diode from On Semiconductor designed for ESD protection of voltage sensitive components requiring ultra-low capacitance. It features a reverse standoff voltage of 5.3V and a typical capacitance of 0.43 pF at 1 MHz, with a maximum capacitance of 0.7 pF from I/O to GND. The device provides IEC 61000-4-2 ESD protection of ±8 kV contact and air discharge, with an ESD withstand voltage of 20 kV. Leakage current is less than 1 nA, and dynamic resistance is under 1 ohm. Power dissipation is rated at 300 mW at 25°C ambient temperature. The part is housed in a surface mount SOD-523 package and operates over a junction temperature range of -55°C to 150°C. It is RoHS3 compliant, Pb-Free, and Halogen Free. The ESD7371 series is suitable for RF antenna protection, RF switching, PA, and near field communications applications.</p>
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380,905
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Price on request
380,905
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STMicroelectronics
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380,300
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Price on request
380,300
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Vishay Dale
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379,316
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Price on request
379,316
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On Semiconductor
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378,389
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Price on request
378,389
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Nexperia USA Inc.
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377,653
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Price on request
377,653
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STMicroelectronics
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376,020
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Price on request
376,020
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Vishay Dale
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371,860
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Price on request
371,860
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Diodes Incorporated
<p>The DESD5V0S1BL-7B is a bidirectional Zener-type TVS diode from Diodes Incorporated, designed for ESD protection in sensitive electronic circuits. It features a reverse standoff voltage of 5V and a breakdown voltage range of 5.5V to 9.5V. The clamping voltage is typically 10V at 1A and 14V at 12A peak pulse current, with a peak pulse power rating of 130W (8/20µs waveform). It provides ±30kV ESD protection for both contact and air discharge per IEC 61000-4-2. This device is suitable for general-purpose ESD protection in portable electronics, cellular handsets, communication systems, and computers. The low capacitance of 35pF (typical) and low leakage current of 5nA (typical) make it ideal for high-speed data lines. The part is packaged in a compact X1-DFN1006-2 (0402) surface-mount package, weighing 0.001g. It is RoHS3 compliant, halogen-free, and has an MSL rating of Level 1. Operating temperature range is -65°C to 150°C, with maximum power dissipation of 250mW on FR-4 PCB.</p>
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371,330
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Price on request
371,330
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On Semiconductor
<p>The ESD7421N2T5G is an ESD protection diode from On Semiconductor designed to protect voltage sensitive components from electrostatic discharge. It offers excellent clamping capability, low leakage, and fast response time for best-in-class protection. Key electrical specifications include a reverse standoff voltage of 5 V, breakdown voltage of 16.5 V (min) for Pin 1 to GND and 10.5 V to 14 V for Pin 2 to GND at 1 mA, and a clamping voltage of 38.1 V at 16 A peak pulse current (100 ns). Leakage current is typically 100 nA (max 500 nA) at 5 V. The diode has a low capacitance of 0.3 pF at 1 MHz, making it suitable for high-speed data lines. ESD protection meets IEC 61000-4-2 Level 4 with ±12 kV contact and ±15 kV air discharge. Response time is less than 1 ns. Power dissipation is 300 mW on FR-5 board at 25°C. The device operates over a junction temperature range of -55°C to 150°C. It is housed in a surface mount 2-XDFN (1x0.6) (SOD-882) package, with tape and reel packaging (8000 per reel). Typical applications include cellular phones, automotive sensors, infotainment systems, MP3 players, and digital cameras.</p>
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370,048
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Price on request
370,048
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On Semiconductor
<p>The ESD7381MUT5G is a unidirectional ESD protection diode from On Semiconductor, designed to protect voltage-sensitive components from electrostatic discharge and transient voltage events. It offers excellent clamping capability with a maximum clamping voltage of 8.0V at 1A and 10V at 3A, ensuring robust protection for downstream circuitry.</p><p> </p><p>Key electrical characteristics include a reverse working voltage of 3.3V, a minimum breakdown voltage of 5.0V at 1mA, and a maximum reverse leakage current of 50nA at 3.3V. The device features an ultra-low typical junction capacitance of 0.37pF, making it suitable for high-frequency applications such as RF antenna lines and USB 2.0 high-speed interfaces.</p><p> </p><p>The ESD7381MUT5G is housed in a compact 2-X3DFN (0.6x0.3mm) surface-mount package, ideal for space-constrained designs. It provides IEC 61000-4-2 ESD protection of ±20kV for both contact and air discharge. The device is RoHS3 compliant, Pb-Free, and Halogen Free/BFR Free.</p>
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369,912
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Price on request
369,912
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STMicroelectronics
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364,089
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Price on request
364,089
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Renesas
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361,600
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Price on request
361,600
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Renesas
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361,600
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Price on request
361,600
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STMicroelectronics
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359,739
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Price on request
359,739
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STMicroelectronics
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358,050
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Price on request
358,050
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Eaton - Electronics Division
<p>The 0603ESDA2-TR2 is an ESD suppressor from Eaton - Electronics Division, designed for general purpose electrostatic discharge protection. It features a polymer technology construction and is rated for a working voltage of 35V.</p><p> </p><p>This component is housed in a compact 0603 (1608 Metric) surface mount package, making it suitable for space-constrained PCB designs. It supports a single circuit configuration and is supplied in tape and reel packaging.</p><p> </p><p>The device is RoHS3 compliant, REACH unaffected, and has an MSL rating of 1 (unlimited). It is intended for use in a wide range of electronic equipment requiring reliable ESD suppression.</p>
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355,747
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Price on request
355,747
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STMicroelectronics
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353,520
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Price on request
353,520
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STMicroelectronics
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351,020
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Price on request
351,020
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STMicroelectronics
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349,428
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Price on request
349,428
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