TVS312SM Circuit Protection

Voltage - Clamping (Max) @ Ipp:	21V
Supplier Device Package:	A-MELF
Package / Case:	SQ-MELF, A
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	150W
Current - Peak Pulse (10/1000µs):	7.1A (8/20µs)
Series:	--
Voltage - Breakdown (Min):	13.8V
Voltage - Reverse Standoff (Typ):	12V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

Transient Voltage Suppressors, or TVS-Diodes, are circuit components designed to protect sensitive electronics from overvoltage damage due to events such as electrostatic discharge or negative voltage transients. They are often used in automotive, military, industrial, and medical applications. One example of a TVS diode is the TVS312SM, a TVS-diode specifically designed for overcurrent and overvoltage protection in applications such as automotive and telecom.

TVS312SM Application Field

The TVS312SM is designed to be used in a variety of automotive and telecom applications. It can be used in automobiles to protect against surges generated by the alternator or sudden voltage transients due to lightning strikes. It can also be used in automotive routers to protect against power spikes or sudden voltage drops caused by sudden disconnects or restarts. In addition, the TVS312SM can be used in telecommunications to protect equipment from voltage transients caused by lightning strikes, short-term outages, or other power disruptions. It also protects against overvoltage caused by voltage creeping between line and ground.

Components And Design Features

The TVS312SM is a bi-directional TVS-diode and consists of a Zener technology diode solution with a voltage breakdown rating of 12V and a unidirectional current rating of 5A. The TVS312SM also features high peak pulse and low clamping voltage. Other features include a very low leakage current which helps protect sensitive components, and a high reverse breakover voltage rating that allows for reliable and robust overvoltage protection. The TVS312SM also has high surge capability which helps it to withstand high-powered lightning strikes or short-term power outages without triggering.

Working Principle

TVS-diodes are designed to protect sensitive electronics from damage. When an overvoltage or transient event occurs, the diode becomes electrically charged. The stored electrical current then acts as a short circuit and dissipates the overvoltage by redirecting it away from the protected components. The TVS312SM is a bi-directional diode, which means that it is able to protect against both positive and negative voltage transients. It is able to do this because of its reverse breakover voltage rating, which is very high and allows the diode to handle large amounts of current with little degradation.

Conclusion

The TVS312SM is a diode specifically designed for automotive and telecom applications and is able to protect sensitive electronics from damage due to overvoltage or transient events. Its components and design features make it a highly robust and reliable device, capable of withstanding large amounts of current with little degradation. Its working principle is based on the store-and-release method, which allows it to dissipate overvoltage events by redirecting the current away from the protected components.

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