SMCJ6.5A-TP Circuit Protection

Current - Peak Pulse (10/1000µs):	134A
Base Part Number:	SMCJ
Supplier Device Package:	DO-214AB (SMC)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	1500W (1.5kW)
Series:	--
Voltage - Clamping (Max) @ Ipp:	11.2V
Voltage - Breakdown (Min):	7.2V
Voltage - Reverse Standoff (Typ):	6.5V
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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Introduction

SMCJ6.5A-TP is a transient voltage surge suppressor (TVS) diode which is used for immediate protection of electronic circuits against voltage transients created by inductive switching loads, lightning or ESD. It consists of a silicon avalanche junction diode which is designed for working in a variety of operating conditions. In this article, we will discuss the application fields of the SMCJ6.5A-TP as well as its working principle.

Application field

The SMCJ6.5A-TP is primarily used in general purpose protection applications. It can be used on printed circuit boards, as well as in consumer, automotive, industrial, and telecom/datacom. In consumer applications such as TVs and other home appliances, the SMCJ6.5A-TP acts as a conductor from a source of power to a consumers electronic device, protecting the device from the risk of damage due to voltage surges or spikes. In automotive applications like the power cables, the diode is used to prevent potential voltage surges from reaching the critical electronic components and causing damage. In industrial applications, the SMCJ6.5A-TP is used to protect control lines, power lines, and other industrial motor controllers from voltage spikes, like those caused by switching inductive loads. In telecom/datacom applications, the SMCJ6.5A-TP is used in the protection of Ethernet lines and telecom lines from voltage transients which could potentially cause undesired operations.

Working principle

The working principle behind the SMCJ6.5A-TP is simple. Most TVS Diodes are designed with a zener diode and a varistor. The zener diode provides the desired overvoltage protection, while the varistor acts as a current limiter for the diode. When a voltage spike occurs, the zener diode will “trigger” and activate the varistor which will limit the voltage by providing a low impedance path to ground. This will ensure that the voltage does not exceed the specified levels which could potentially damage the component. The varistor will act as a “scapegoat”, dissipating any excess energy as heat. The SMCJ6.5A-TP can provide protection up to 6.5 Amperes, and the protection conditions are specified up to an Ultra Fast response time of 1.0 ns. It is also designed to have a low capacitance of 42 pF. The SMCJ6.5A-TP TVS diode also features a peak power rating of 600 Watts of peak pulse power @ 8/20 µs, making it a reliable and suitable choice for general protection applications.

Conclusion

In conclusion, the SMCJ6.5A-TP is a transient voltage surge suppressor (TVS) diode which can provide protection from voltage surges and spikes on a variety of devices, circuits, power and control cables, and industrial motor controllers. The diode is able to provide protection up to 6.5 Amperes. The working principle of the SMCJ6.5A-TP is based on a zener diode and a varistor which will activate in the event of a voltage spike and provide a low impedance path to ground. This will ensure that the voltage does not exceed the specified levels, and will provide reliable protection for a variety of applications.

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