What this TVS diode guards
The SMCJ8.5E3/TR13 is a unidirectional Zener TVS diode from Microchip Technology, rated for 1500W peak pulse power (10/1000µs waveform). It clamps transients on an 8.5V nominal rail, with a breakdown voltage minimum of 8.89V and a clamping ceiling of 15V at 100A peak pulse current. The 1500W rating means it can absorb substantial energy from lightning, inductive load switching, or ESD events without failing — useful for power supplies, telecom interfaces, and industrial control inputs that see real-world surges.
Housed in a DO-214AB (SMC) package, the SMCJ8.5E3/TR13 is a surface-mount device supplied on Tape & Reel. The DO-214AB footprint is standard and widely used, so board layout is straightforward — just ensure the copper pad area under the cathode tab is adequate for heat sinking during a pulse. That's wide enough for outdoor telecom cabinets, engine bay electronics, or satellite payloads where the ambient can swing hard.
Available through multiple distributor channels.