ATV50C180JB-HF Circuit Protection

Voltage - Clamping (Max) @ Ipp:	29.2V
Supplier Device Package:	DO-214AB (SMC)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	5000W (5kW)
Current - Peak Pulse (10/1000µs):	171.2A
Series:	Automotive, AEC-Q101
Voltage - Breakdown (Min):	20V
Voltage - Reverse Standoff (Typ):	18V
Bidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

Transient Voltage Suppressor (TVS) diodes are electrostatic discharge (ESD) and surge protection components designed to protect electrical circuits during voltage transients. ATV50C180JB-HF is one example of a TVS diode (also known as a transient suppression diode), designed to provide effective protection for a wide range of applications. This article focuses on the application field and working principle of ATV50C180JB-HF.

Application Field

ATV50C180JB-HF is a unidirectional TVS diode designed and qualified for automotive applications. It has a low-profile surface mount package of 8 Pin SO-8L. The diode provides bidirectional overvoltage protection for automotive circuits, including the automotive-body, interior electro-mechanical assemblies, multimedia, CAN (Controller Area Network) and LIN systems. ATV50C180JB-HF was designed to protect automotive circuits from ESD and surges. It is designed to meet the standards of AEC-Q101, which is the automotive industry’s standard for surge protection devices. Due to its low-profile surface mount package, it is ideal for applications that require a high level of protection in a small amount of space.

Working Principle

When the voltage applied across an ATV50C180JB-HF exceeds the specified diode breakdown voltage (VBR) rating, the diode “breaks down” and a current is allowed to flow. The breakdown voltage for the ATV50C180JB-HF is 20V. This voltage should not be exceeded, as it can damage the diode and cause it to fail. To prevent this from happening, the ATV50C180JB-HF has been designed with a sensitive characteristic, allowing it to be triggered at very low voltages. When triggered, the TVS diode is designed to absorb the surge current and dissipate the energy it contains, to protect the circuit from further voltage transients. Once the transient has passed, the diode returns to its high impedance state, blocking the flow of current. This is essential for preventing damage to the protected device from further voltage transients.

Conclusion

ATV50C180JB-HF is a low-profile surface mount unidirectional TVS diode designed to provide effective surge protection for automotive circuits. Its low-profile package makes it ideal for applications that require high protection levels in confined areas. When the applied voltage exceeds the specified diode breakdown voltage rating, the diode triggers and absorbs the surge current, dissipating its energy and protecting the circuit from further transients. The diode then returns to its high impedance state, blocking further current flow and protecting the device from further voltage transients.

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