SMCJ43CA 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 43 V, a breakdown voltage of 47.8 V, and a maximum reverse voltage rating of 54.9 Vrms, with a compact SMC (DO-214AB) surface mount package. The diode delivers peak pulse power dissipation of 1500 watts at a 1 ms pulse width and maintains steady-state power dissipation of 5.0 watts at 75°C, with a peak forward surge current rating of 200 amps. Operating across a temperature range of -55°C to +150°C, the SMCJ43CA provides fast transient response and is RoHS compliant with lead-free termination, making it ideal for protecting sensitive electronic circuits from transient voltage events.