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 | |
|---|---|---|---|
On Semiconductor
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49,842
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Price on request
49,842
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Bourns
|
49,561
|
Price on request
49,561
|
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Bourns
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49,552
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Price on request
49,552
|
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Littelfuse Inc.
<p>The Littelfuse 1812L160/12DR is a PolySwitch resettable PPTC (positive temperature coefficient) fuse designed for overcurrent protection in low-voltage electronic circuits. It offers a hold current of 1.6 A and a trip current of 2.8 A, with a maximum voltage rating of 12 V DC and a maximum interrupt current of 100 A. The device features a fast trip time of 1 second at 8 A, with initial resistance as low as 0.030 Ω and post-trip resistance of 0.100 Ω, minimizing power loss during normal operation.</p><p> </p><p>This surface-mount component is housed in a compact 1812 (4532 metric) concave package, measuring 4.55 mm x 3.24 mm with a maximum thickness of 1.25 mm. It is suitable for automated assembly and reflow soldering processes. The operating temperature range spans -40°C to 85°C, making it appropriate for a wide variety of environments.</p><p> </p><p>Typical applications include plug-and-play protection for motherboards and peripherals, USB port protection, PCI card overcurrent protection, and game console port protection. The device is RoHS compliant, lead-free, and halogen-free, meeting current environmental standards.</p>
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49,400
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Price on request
49,400
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Nexperia USA Inc.
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49,352
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Price on request
49,352
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STMicroelectronics
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49,138
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Price on request
49,138
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Vishay Dale
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49,020
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Price on request
49,020
|
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Diodes Incorporated
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49,020
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Price on request
49,020
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Diodes Incorporated
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49,020
|
Price on request
49,020
|
|
Nexperia USA Inc.
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49,020
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Price on request
49,020
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Vishay Dale
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49,000
|
Price on request
49,000
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STMicroelectronics
<p>The ESDA8V2-1MX2 is a unidirectional TVS (transient voltage suppression) diode manufactured by STMicroelectronics. It is designed to protect sensitive electronics from voltage transients induced by lightning, ESD, and other surge events. With a peak pulse power rating of 500W (8/20µs waveform), this device provides robust clamping performance.</p><p> </p><p>The diode features a reverse standoff voltage of 5V, allowing it to be used in low-voltage applications. Its clamping voltage is rated at 18.5V, and it can handle a peak pulse current of 27A (8/20µs). The typical capacitance is 350pF at 1MHz, which is suitable for high-speed data lines.</p><p> </p><p>The ESDA8V2-1MX2 is offered in a compact 2-UFDFN surface mount package (2-µQFN, 1.45x1.0mm), occupying minimal board space. It is rated for operation over a wide temperature range of -40°C to 125°C (junction temperature). The device is RoHS3 compliant and has a moisture sensitivity level of 1 (unlimited).</p><p> </p><p>This TVS diode is suitable for general-purpose transient protection in consumer, industrial, and telecommunications equipment. Its low profile and high power density make it ideal for space-constrained designs.</p>
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49,000
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Price on request
49,000
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Semtech
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49,000
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Price on request
49,000
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Diodes Incorporated
<p>The DESD5V0S1BA-7 is a low capacitance bidirectional TVS (Transient Voltage Suppression) diode designed by Diodes Incorporated for protecting sensitive electronic circuits from electrostatic discharge (ESD) and other voltage transients. It provides ESD protection per IEC 61000-4-2 standard up to ±30kV for both air and contact discharge, and can handle a peak pulse current of 12A (8/20µs) with a clamping voltage of 14V at that current.</p><p> </p><p>With a reverse standoff voltage of 5V and a breakdown voltage range of 5.5V to 9.5V, this diode is suitable for low-voltage applications such as cellular handsets, portable electronics, communication systems, and computers. Its low capacitance of 35pF (typical at 1MHz) makes it ideal for high-speed data lines where signal integrity is critical.</p><p> </p><p>The device is packaged in a SOD-323 surface-mount package, which is lead-free and halogen-free, and compliant with RoHS3 and REACH. It has a moisture sensitivity level of 1 (unlimited) and operates over a temperature range of -55°C to +150°C. The standard packaging is tape and reel with 3000 pieces per reel.</p>
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48,668
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Price on request
48,668
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Bel Fuse
<p>The Bel Fuse 0ZCF0110FF2C is a surface-mount polymeric PTC resettable fuse from the 0ZCF series. It is designed to provide overcurrent protection in a compact 2920 (7351 Metric) concave package. The device has a hold current of 1.1 A and a trip current of 2.2 A, with a maximum voltage rating of 33 V and a maximum interrupt current of 100 A. Typical power dissipation in the tripped state is 1.5 W at 23°C. The initial minimum resistance is 0.090 Ω, and the maximum resistance one hour after tripping or soldering is 410 mΩ. The time to trip at 8.0 A is 0.5 seconds. The operating temperature range is -40°C to 85°C. This component is RoHS compliant, lead-free, halogen-free, and AEC-Q compliant. It holds TUV and UL agency approvals.</p>
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48,591
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Price on request
48,591
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Texas Instruments
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48,414
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Price on request
48,414
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Littelfuse Inc.
<p>The Littelfuse 0251.500NRT1L is a 251 series PICO II very fast-acting fuse designed for secondary protection in space-constrained applications. It is rated for 500mA at 125VAC/VDC with a breaking capacity of 50A AC and 300A DC. The fuse features a fast blow response time with a melting I²t of 0.0598 A²s. It is housed in an axial lead package with a diameter of 0.110" and length of 0.280", suitable for through hole mounting. The operating temperature range is -55°C to 125°C. The fuse is approved by CCC, CSA, cURus, and TUV. The datasheet lists typical applications including flat-panel displays, LCD monitors, power supplies, and medical equipment. The cold resistance is 0.302 Ω with a voltage drop of 0.2165 V.</p>
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48,252
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Price on request
48,252
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On Semiconductor
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48,000
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Price on request
48,000
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TDK Corporation
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48,000
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Price on request
48,000
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STMicroelectronics
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48,000
|
Price on request
48,000
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Bourns
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47,806
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Price on request
47,806
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Littelfuse Inc.
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47,760
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Price on request
47,760
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STMicroelectronics
<p>The ESDA25B1RL is a Zener-based TVS diode array from STMicroelectronics, designed for transient voltage suppression. It features a reverse standoff voltage of 24V and a peak pulse power dissipation of 150W. The device incorporates 6 bidirectional channels, making it suitable for multi-line ESD protection applications. It is mounted in an 8-SOIC surface mount package with Gull Wing leads, and is not intended for power line protection. The part is RoHS3 compliant and REACH unaffected, with an MSL rating of Level 1. It is classified as a general purpose component, suitable for a wide range of electronic circuits requiring transient protection.</p>
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47,718
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Price on request
47,718
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On Semiconductor
<p>The ESD7462N2T5G is an ultra-low capacitance ESD protection diode from On Semiconductor, designed to protect voltage sensitive components from electrostatic discharge and transient voltage events. It features a typical capacitance of 0.3 pF, making it ideal for high-frequency RF applications such as antenna lines, RF switching, and wireless handsets.</p><p> </p><p>This device provides robust ESD protection with ratings of ±18 kV for both contact and air discharge per IEC 61000-4-2, and up to ±30 kV for ISO 10605 contact discharge. It also offers low insertion loss of 0.05 dB at 1 GHz and 0.10 dB at 3 GHz, ensuring signal integrity in RF paths. The diode is bidirectional with a single channel and has a typical leakage current of less than 1 nA.</p><p> </p><p>The ESD7462N2T5G is housed in a compact 2-XDFN surface mount package (2-X2DFN 1x0.6 mm), suitable for space-constrained designs. It is RoHS compliant, Pb-Free, and Halogen Free, and supports an operating temperature range of -55°C to 150°C.</p>
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47,670
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Price on request
47,670
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Vishay Dale
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47,586
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Price on request
47,586
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STMicroelectronics
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47,500
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Price on request
47,500
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STMicroelectronics
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47,405
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Price on request
47,405
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Littelfuse Inc.
<p>The Littelfuse 0451010.MRL is a very fast-acting fuse from the Nano2 SMF series, designed for secondary side over-current protection in surface mount applications. It is rated for 10A at 125VAC/VDC with a breaking capacity of 35A AC and 50A DC. The fuse offers a cold resistance of 0.02780 Ω and a melting I²t of 26.46 A²s.</p><p> </p><p>This surface mount fuse comes in a 2-SMD square end block package measuring 6.10mm x 2.69mm x 2.69mm. It operates over a wide temperature range of -55°C to 125°C and is RoHS and Halogen Free compliant. Agency approvals include CSA, PSE, and UL.</p><p> </p><p>Typical applications include notebook PCs, LCD TVs, power supplies, networking equipment, battery charging circuits, and industrial equipment. The very fast-acting response provides reliable protection in sensitive electronic circuits.</p>
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47,386
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Price on request
47,386
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Texas Instruments
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47,364
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Price on request
47,364
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Littelfuse Inc.
<p>Littelfuse 0452003.MRL is a 3A, 125V Slow Blow (time-delay) surface mount fuse from the NANO2 Slo-Blo series. It is designed to accommodate inrush currents that would cause fast-acting fuses to open, making it suitable for applications with high surge currents.</p><p> </p><p>The fuse features a 2-SMD square end block package with dimensions 6.10mm x 2.69mm x 2.69mm. It has a breaking capacity of 50A at rated voltage and a nominal cold resistance of 0.0340 Ω. The melting I²t is 20.16 A²s.</p><p> </p><p>This fuse operates over a wide temperature range of -55°C to 125°C. It is RoHS compliant and halogen free, with agency approvals including CSA, PSE, and UR. Typical applications include notebook PCs, LCD TVs, power supplies, networking equipment, and battery charging circuits.</p>
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47,360
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Price on request
47,360
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Diodes Incorporated
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47,334
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Price on request
47,334
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Diodes Incorporated
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47,317
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Price on request
47,317
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|
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Littelfuse Inc.
<p>The Littelfuse 1812L125/6PR is a polymeric PTC resettable fuse designed for overcurrent protection in low-voltage applications. It features a hold current of 1.25A and a trip current of 2.5A, with a maximum voltage rating of 6V DC. The device can handle up to 100A fault current and has a typical power dissipation of 0.8W.</p><p> </p><p>This surface mount component is housed in a compact 1812 (4532 Metric) concave package, measuring 4.55mm x 3.24mm x 0.75mm. It offers fast response with a time to trip of 400ms at 8A. The operating temperature range is -40°C to 85°C, making it suitable for a variety of environments.</p><p> </p><p>Typical applications include USB peripherals, PCI cards, and game console port protection, as noted in the datasheet. The 1812L series is RoHS compliant and halogen-free, supporting lead-free soldering processes.</p>
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47,105
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Price on request
47,105
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Infineon Technologies
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47,020
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Price on request
47,020
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On Semiconductor
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46,920
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Price on request
46,920
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Semtech
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46,910
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Price on request
46,910
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Bourns
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46,726
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Price on request
46,726
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Diodes Incorporated
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46,407
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Price on request
46,407
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Würth Elektronik
<p>The Würth Elektronik 824001 is a high-speed TVS diode designed for steering (rail-to-rail) protection in Ethernet applications. It features 4 unidirectional channels plus a dedicated VDD pin, making it suitable for protecting multiple data lines in a single compact package. The device offers a reverse standoff voltage of 5V (maximum) and a typical clamping voltage of 9V, ensuring low-voltage signal integrity is maintained while clamping transient overvoltages. With a peak pulse current rating of 5A (8/20µs) and 40A (EFT 5/50ns), it provides robust protection against IEC 61000-4-2 ESD events (15kV air, 8kV contact) and other electrical fast transients. The 824001 is housed in a surface-mount SOT-23-6L package (6-pin) with a compact footprint, ideal for space-constrained designs. It is RoHS, REACH, and Halogen Free compliant, with MSL Level 3. The operating temperature range is -55°C to 85°C. This component is particularly suited for protecting Ethernet PHY interfaces, USB ports, and other high-speed data lines requiring rail-to-rail clamping.</p>
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46,250
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Price on request
46,250
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Bourns
<p>The Bourns CDNBS08-T15C is a bidirectional TVS diode array designed for surge and ESD protection in data line and portable electronics applications. It offers a working peak voltage of 15V, a minimum breakdown voltage of 16.7V at 1 mA, and a maximum clamping voltage of 24V at 1 A. The typical clamping voltage is 30V at a peak pulse current of 17 A (8/20 µs waveform), with a peak pulse power rating of 500 W.</p><p> </p><p>This device integrates four bidirectional channels in a single 8-SOIC surface mount package, making it suitable for protecting multiple signal lines such as RS-232, RS-422, RS-423, and audio/video inputs. It provides ESD protection up to ±30 kV (contact and air discharge) per IEC 61000-4-2. The operating temperature range is -55°C to 150°C (junction), and it is RoHS3 compliant.</p><p> </p><p>The package size is 8-SOIC (0.154", 3.90mm width), and the supplier device package is also 8-SOIC. It is designed for easy handling on standard pick-and-place equipment.</p>
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46,125
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Price on request
46,125
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Diodes Incorporated
<p>The D15V0X1B2LP-7B is a 15V bidirectional TVS diode from Diodes Incorporated designed to protect sensitive electronics from electrostatic discharge (ESD) damage. It features an ultra-low typical capacitance of 0.55pF at 1MHz, making it suitable for high-speed data lines. The device provides robust ESD protection per IEC 61000-4-2 with ±20kV contact discharge and ±24kV air discharge capability.</p><p> </p><p>With a minimum breakdown voltage of 16.5V and a clamping voltage of 30V at a peak pulse current of 5A (8/20µs), this diode offers reliable transient voltage suppression. The reverse working voltage is 15V maximum. It is housed in a low-profile X1-DFN1006-2 surface-mount package with a maximum height of 0.53mm and a small PCB footprint of 1.08mm x 0.68mm, ideal for compact portable electronics.</p><p> </p><p>The device is fully RoHS3 compliant, lead-free, halogen and antimony free, and has a moisture sensitivity level of 1 (unlimited). It operates over a junction temperature range of -65°C to 150°C with a maximum power dissipation of 250mW. Typical applications include cellular handsets, portable electronics, computers, and peripherals.</p>
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46,100
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Price on request
46,100
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Nexperia USA Inc.
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46,020
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Price on request
46,020
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STMicroelectronics
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46,020
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Price on request
46,020
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Nexperia USA Inc.
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46,020
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Price on request
46,020
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STMicroelectronics
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46,020
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Price on request
46,020
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|
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Nexperia USA Inc.
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46,020
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Price on request
46,020
|
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Littelfuse Inc.
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46,000
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Price on request
46,000
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Littelfuse Inc.
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45,745
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Price on request
45,745
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On Semiconductor
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45,725
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Price on request
45,725
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On Semiconductor
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45,572
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Price on request
45,572
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