The P4SMAJ54CA is a bidirectional SMD transient voltage suppressor diode designed for overvoltage and ESD protection in commercial and industrial applications. It features a standoff voltage (VWM) of 54 V with a breakdown voltage (VBR) of approximately 62.6 V at 1 mA, and delivers a peak pulse power dissipation of 400 W with a 10/1000 µs waveform. The device operates with a maximum steady-state power dissipation of 1 W at 75°C, a forward voltage drop below 3.5 V at 25 A, and a junction temperature range of -50°C to +150°C. Its very fast response time and bidirectional operation make it ideal for protecting sensitive circuits against transient overvoltages, ESD events, and free-wheeling applications. The device is packaged in SMA (DO-214AC) format, is RoHS compliant, and available in both standard and AEC-Q101 qualified versions.