Device identity and key ratings
The SMBJ15CE3/TR13 is a Zener-type bidirectional TVS diode from Microchip Technology, designed to clamp transients on signal or power lines with a single device — no orientation concern for AC or bipolar rails. The wide operating junction temperature range of -65°C to 150°C supports use in outdoor telecom, industrial control, and automotive-adjacent environments where thermal cycling is a factor.
Package and mounting
No power line protection feature — this part is intended for signal or low-power rail clamping, not mains or high-energy surge suppression.