What this Zener TVS protects and how it clamps
The SMCJ75CE3/TR13 is a bidirectional Zener TVS diode from Microchip, rated for 1500W peak pulse power (10/1000µs waveform). Its 75V reverse standoff voltage means it stays transparent on a 75V nominal rail, and the 134V clamping voltage at 11.2A peak pulse current defines the voltage the protected circuitry sees during a surge event. The DO-214AB (SMC) package is standard for surface-mount TVS diodes in this power class, with a wide operating temperature range from -65°C to 150°C junction, suiting industrial and outdoor environments where thermal cycling is a factor.
Sourcing and lifecycle: active production, no last-time-buy pressure
Microchip lists the SMCJ75CE3/TR13 as Active.
Parametric fit: standoff, breakdown, and clamping
The 134V clamp at 11.2A gives a clamping factor of roughly 1.8× the standoff voltage, which is typical for this power class. The single bidirectional channel protects both polarities in one package, simplifying layout for differential pairs or bipolar supplies.