Bidirectional 85V TVS with 1.5kW surge rating
The SMCJ85CAE3/TR13 is a bidirectional Zener TVS diode from Microchip Technology, rated for 1.5kW peak pulse power at 10/1000µs waveform. Its 85V reverse standoff voltage and 94.4V minimum breakdown voltage make it a fit for 48V to 72V DC bus protection, telecom line cards, and industrial power supplies where symmetrical clamping is needed.
Clamping voltage and peak current for rail protection
Maximum clamping voltage is 137V at a peak pulse current of 10.4A (10/1000µs waveform). This clamping ceiling determines the voltage stress the downstream components see during a surge event — a 137V clamp on an 85V rail leaves 52V of headroom, which is typical for TVS diodes in this power class. The part is a single bidirectional channel, meaning it clamps both polarities symmetrically — useful for AC-coupled signals or floating lines where polarity is not fixed.
Active production, DO-214AB package on tape and reel
Microchip lists this part as Active, so there is no looming end-of-life concern. The DO-214AB (SMC) package footprint is shared across the SMCJ family, making it a drop-in for existing layouts using the same case code.