SMCJ51CA is a bidirectional transient voltage suppressor diode designed for surge and ESD protection in portable communications, computing, and video equipment. This device features a working peak reverse voltage of 51 V, a breakdown voltage of 56.7 V, and a maximum reverse voltage rating of 82.4 V, with a maximum reverse current of 18.2 A. The diode is housed in a compact SMC (DO-214AB) surface mount package and delivers peak pulse power dissipation of 1500 watts with a peak forward surge current of 200 amps. It operates over a temperature range of -55°C to +150°C and is RoHS compliant with lead-free termination, making it ideal for protecting sensitive electronic circuits from transient voltage spikes and electrostatic discharge events.