Circuit Protection

<p>The 1N5651A is a unidirectional Zener-based transient voltage suppressor (TVS) diode from Microchip Technology. It is designed for protecting sensitive electronics from voltage transients caused by inductive switching, RF effects, and secondary lightning surges. With a peak pulse power rating of 1500W at a 10/1000µs waveform, it clamps transients in less than 100 picoseconds to a maximum clamping voltage of 77V.</p><p>&nbsp;</p><p>This device features a working voltage (V_RWM) of 47.8V and can handle a peak pulse current of 19.5A. It is housed in a hermetically sealed DO-13 metal package with axial through-hole mounting, providing robust mechanical and environmental protection. The 1N5651A is part of a broader series that includes military qualified versions (JAN, JANTX, JANTXV) for applications requiring higher reliability.</p><p>&nbsp;</p><p>Typical applications include general purpose transient suppression, protection of avionics and electrical systems, and compliance with IEC61000-4-5 surge, IEC61000-4-2 ESD, and IEC61000-4-4 EFT standards. The device does not include power line protection and is intended for unidirectional operation.</p>

<p>The Bourns CDWBS16-PLC01-6 is a bidirectional TVS diode array designed to protect sensitive electronics from voltage transients. It features a reverse standoff voltage of 6V and a minimum breakdown voltage of 8V at 1mA. The device provides clamping voltages of 15V and 16V under different impulse conditions, ensuring robust protection. With a peak pulse power rating of 1500W (10/1000µs waveform), it can handle high surge currents.</p><p>&nbsp;</p><p>This TVS diode array offers ESD protection up to ±8kV contact and ±15kV air discharge per IEC 61000-4-2, and surge protection per IEC 61000-4-5, Telcordia GR1089, and FCC Part 68. Typical capacitance is 50pF at 1MHz, making it suitable for high-speed data lines. The device is RoHS3 compliant and has an operating temperature range of -55°C to 150°C.</p><p>&nbsp;</p><p>The CDWBS16-PLC01-6 is housed in a 16-SOIC surface mount package with a 7.50mm width. It is intended for use in Ethernet, telecom, and other communication interfaces. The part is currently available but not recommended for new designs, per the manufacturer.</p>

<p>The ESD8551N2T5G is a low capacitance ESD protection diode manufactured by On Semiconductor. It is designed to protect high-speed data lines from electrostatic discharge (ESD) events. The device features a typical capacitance of only 0.2 pF (max 0.3 pF) and a low clamping voltage of 16 V, making it suitable for voltage-sensitive high-speed interfaces. It provides ESD protection per IEC 61000-4-2 (Level 4) with ±20 kV contact and air discharge, as well as ISO 10605 standards. The device is a single bidirectional channel Zener TVS diode with a working peak voltage of 3.3 V. It operates over a junction temperature range of -55°C to +125°C and stores from -55°C to +150°C. The ESD8551N2T5G is housed in a 2-X2DFN (1x0.6) surface mount package, supplied in tape and reel with a standard quantity of 8000. The package is Pb-Free, Halogen Free/BFR Free, and RoHS compliant. This device is ideal for applications such as USB 3.0, MHL 2.0, and eSATA.</p>

<p>The ESD8104MUTAG is a low capacitance ESD protection diode array designed to protect high-speed data lines from electrostatic discharge. It offers four unidirectional channels with a reverse working voltage of 3.3V and a typical clamping voltage of 11.4V. The device provides IEC 61000-4-2 ESD protection of ±15 kV for both contact and air discharge.</p><p>&nbsp;</p><p>With an ultra-low typical capacitance of 0.3pF (0.37pF maximum) at 1 MHz, this diode array is ideal for preserving signal integrity on high-speed interfaces such as USB 3.0/3.1, HDMI 2.0, and DisplayPort. The flow-through style UDFN10 package (10-UFDFN, 2.5x1mm) enables easy PCB layout and matched trace lengths.</p><p>&nbsp;</p><p>The device is surface mount, RoHS compliant, Pb-Free, and Halogen Free/BFR Free. It operates over a junction temperature range of -55°C to +125°C and is supplied in tape and reel packaging with 3000 pieces per reel.</p>

<p>The Littelfuse 1812L150/16DR is a PolySwitch resettable PTC (positive temperature coefficient) fuse designed for overcurrent protection in electronic circuits. It offers a hold current of 1.5 A and a trip current of 2.8 A, with a maximum voltage rating of 16 V DC. The device can handle fault currents up to 100 A and has a typical power dissipation of 0.8 W. The initial resistance is as low as 40 mΩ, increasing to a maximum of 110 mΩ after tripping. The time to trip at 8 A is 500 ms. This component is housed in a compact 1812 (4532 metric) concave surface-mount package, measuring 4.55 mm x 3.24 mm x 1.25 mm. It operates over a temperature range of -40°C to 85°C. The device is RoHS compliant and halogen-free, suitable for applications such as USB peripherals, PCI cards, and game console port protection.</p>

<p>The ESD9B3.3ST5G is an ESD protection diode manufactured by On Semiconductor, designed to protect sensitive electronic components from electrostatic discharge. It is a unidirectional Zener TVS diode with a reverse standoff voltage of 3.3V and a maximum clamping voltage of 11.5V at 2A peak pulse current (8/20µs). The device offers ultra-fast response time of less than 1ns.</p><p>&nbsp;</p><p>This diode provides robust ESD protection meeting IEC 61000-4-2 Level 4 with ±18kV contact and air discharge capability. It is also AEC-Q101 qualified for automotive applications. The typical capacitance is 15pF at 1MHz, making it suitable for high-speed data lines.</p><p>&nbsp;</p><p>The ESD9B3.3ST5G is housed in a compact SOD-923 surface-mount package, measuring 1.0 x 0.60mm with a low profile of 0.4mm. It is rated for a maximum power dissipation of 300mW on FR-5 board and can operate over a temperature range of -55°C to 150°C. The package is epoxy molded with UL 94 V-0 rating and lead finish is 100% matte tin. The device is Pb-free and meets MSL 1 requirements.</p><p>&nbsp;</p><p>Typical applications include cellular phones, MP3 players, digital cameras, and other portable electronics where board space is limited. The component is supplied in tape and reel packaging with 8000 units per reel.</p>