SMCJ12A V7G Circuit Protection

Series:	SMCJ
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Zener
Unidirectional Channels:	1
Voltage - Reverse Standoff (Typ):	12V
Voltage - Breakdown (Min):	13.3V
Voltage - Clamping (Max) @ Ipp:	19.9V
Current - Peak Pulse (10/1000µs):	79A
Power - Peak Pulse:	1500W (1.5kW)
Power Line Protection:	No
Applications:	Telecom
Capacitance @ Frequency:	--
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	DO-214AB, SMC
Supplier Device Package:	DO-214AB (SMC)

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TVS - Diodes

TVS - Diodes, also known as Transient Voltage Suppressors, are a type of diode component specifically designed to protect electronic components from electrical transient voltage surges. These diodes are capable of handling higher surge voltages with fast response times. This makes them ideal for applications such as power supplies, automotive, lighting, telecoms, and industrial systems.The SMCJ12A V7G is a TVS diode designed for ESD (electrostatic discharge) protection in automotive and other applications. The device offers 20.0V of peak pulse current, and can withstand repeated ESD surges up to 8kV contact discharge and 15kV air discharge.

Working Principle

TVS diodes are constructed from two or more diodes arranged in parallel. They are designed to clamp or block any surge voltages that exceed the breakdown voltage of the diode combination. This is achieved by the diodes efficiently conducting the transient current away from the protected components and then providing a low impedance path that dissipates the energy over time. The TVS diode works on the principle of avalanche breakdown. When a certain voltage is applied to the diode, it will create a large current that will be handled by the diode and slowly dissipated over time. In a TVS diode, the breakdown voltage is designed to be far lower than the expected peak surge voltages it will encounter. Once the breakdown voltage is exceeded, the diode becomes forward biased and the current path is changed from the regular diode load to the low impedance path offered by the avalanche breakdown, allowing the diode to clamp the voltage.

Application Field

The SMCJ12A V7G is designed specifically for ESD protection applications and to protect against transients due to lightning strikes, power surges, and ESD shocks. The device offers excellent clamping capability, low leakage current, low capacitance, and fast response times. It is highly reliable and is suitable for automotive, industrial, general purpose, RF, and telecoms applications. The SMCJ12A V7G is suitable for a wide variety of automotive ESD protection applications. In automotive electrical systems, the TVS diode is often used to protect electronic control units, switches, wiring, and other parts from ESD shocks. The device can also be used to help protect against data line surges resulting from lightning strikes and power surges. In industrial systems, the SMCJ12A V7G can be used to protect sensitive electronics such as sensors, controllers, and solenoids from transient voltage surges. The device can help protect against power surges from a generator, power supply, or other source, as well as ESD shocks.

Conclusion

TVS diodes like the SMCJ12A V7G are key components in protecting electronic components and systems from transient voltage surges. The device offers excellent clamping capability, low leakage current, low capacitance, and fast response times. It is suitable for a wide range of applications, including automotive, industrial, general purpose, RF, and telecoms.

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