What this TVS diode does on a 16V rail
The SMCJ16CE3/TR13 is a bidirectional Zener transient voltage suppressor (TVS) diode designed to clamp overvoltage spikes on a nominal 16V DC rail. Its 16V reverse standoff voltage means it stays transparent below that level, only conducting when the line exceeds the 17.8V minimum breakdown threshold. Rated for 1500W peak pulse power per the 10/1000µs waveform, this part can absorb substantial surge energy — up to 52.1A peak pulse current — before the clamping voltage reaches 28.8V. That clamping ceiling is the key number for the downstream circuit: anything rated below 28.8V on that rail needs its own protection or a higher voltage rating.
Package and mounting for the BOM
Power line protection is not supported — this is a signal- or low-power-rail TVS, not a mains-side suppressor. For a 16V bus in a general-purpose application, it fits well on a secondary DC rail after the main regulator.
Active production and ordering
Microchip lists the SMCJ16CE3/TR13 as Active, so there is no end-of-life pressure for new designs or ongoing production. The base product number is SMCJ16; the full ordering code includes the /TR13 suffix for the reel option.