SMCJ495A Circuit Protection

Voltage - Clamping (Max) @ Ipp:	760V
Supplier Device Package:	SMC (DO-214AB)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	2A
Series:	SMCJ
Voltage - Breakdown (Min):	522V
Voltage - Reverse Standoff (Typ):	495V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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SMCJ495A Application Field and Working Principle

The SMCJ495A series of transient voltage suppressor (TVS) diodes are designed to protect sensitive electronic components from high voltage transients. The SMCJ495A series offer unidirectional and bidirectional ESD protection up to 25kV contact and 40kV air per IEC 61000-4-2. These components can be used in multiple applications, including automotive, consumer electronics, digital displays, PCs, power supplies, and telecom systems.The SMCJ495A diode is an ultra-small, low-capacitance, dual-channel TVS diode capable of protecting sensitive electronic equipment from damaging ESD pulses. The diode features a wide variety of technologies, including low leakage, high ESD capability, low dynamic impedance, low clamping voltage, high surge current handling, and minimal pulse generating.The SMCJ495A diode utilizes a symmetrical structure to provide bidirectional protection. The device features two back-to-back avalanche breakdown regions in which both p-n junctions can withstand voltage from either direction. This feature provides a low-capacitance, low-impedance interface between the input and output ports of the device under ESD test conditions.The SMCJ495A diode has a very low capacitance of sensor 15pF, making it suitable for high-speed data applications. The diode exhibits a high dynamic impedance of less than 6Ω at frequencies from 1 to 300MHz, which ensures proper ESD protection. The device also features a wide clamping voltage range from 14.8V to 30.5V, enabling it to protect sensitive components from overvoltage and electrostatic discharge. Additionally, the device is well-suited for high surge current rated up to 13A of peak current.The SMCJ495A series offers a variety of mounting options, including SMD, SMT, and through-hole. This provides design flexibility and allows engineers to easily incorporate these components into various applications.In conclusion, the SMCJ495A series of transient voltage suppressor diodes offer superior protection from ESD pulses for automotive, consumer electronics, digital displays, PCs, power supplies, and telecom systems. The series features low leakage, high-ESD capability, low dynamic impedance, low clamping voltage, high surge current handling, and minimal pulse generating. Engineers can take advantage of multiple mounting options, making it simple to integrate the devices into their designs.

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