SMCJ48CA R7G

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Transient Voltage Suppression (TVS) diodes are discrete semiconductor devices, which are available in various package sizes and configurations such as single bidirectional, unidirectional (back-to-back) and dual bidirectional. Generally, TVS diodes protect electronic equipment from high-energy voltage transients, such as Electrostatic Discharge (ESD) events. In particular, the SMCJ48CA R7G device from Littelfuse is a bidirectional, leaded, 400W peak pulse power (ppp) for a 10/1000μs waveform, single line transient voltage suppressor with improved performance characteristics.

SMCJ48CA R7G Application Field

TMCJ48CA R7G is designed to protect sensitive electronic systems from voltage transients induced by lightning and other transient voltage events, and is mainly applicable in automotive electronics and industrial/home appliances. It is encased in the SMC_J (surface mount component with J-leads) package, and valid values are available up to Vrwm = 44 V and Irwm = 7 A. It also offers excellent clamping performance, and excellent resistance to thermal shock and multiple soldering.

SMCJ48CA R7G Operating Principle

TVS Diodes like the SMCJ48CA R7G perform the task of diverting excess current away from the circuit and safely discharging it into the ground, as compared to other protection components, like fuses and arrestors. The TVS Diode takes the form of a two terminal bidirectional voltage dependent resistor, with very high blocking voltage and avalanche breakdown voltage.

A typical SMCJ48CA R7G diode has a maximum peak power of 400W, with clamping voltage of 40V for unidirectional and 32V for bidirectional applications. It has a very fast response time and provide superior protection against electrical overloads, overvoltage and electrostatic discharge at 400 Watts per pulses, sent for a 10/1000 μs waveform.

The SMCJ48CA R7G can handle very fast current rise and fall times to redirect high-energy pulses away from circuits. Furthermore, it can regulate and resist inductive load switching. It has a wide operating temperature range (-55 degrees to 150 degrees Celsius) and a high thermal stability and reliability. This makes it suitable for long-term operations in harsh condition, in automotive and other mobile applications.

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