9.44 V breakdown threshold for 8.5 V rail protection
The SMBJ8.5CE3/TR13 is a bidirectional Zener TVS from Microchip Technology designed to clamp transients on an 8.5 V nominal rail. Its minimum breakdown voltage of 9.44 V ensures the device remains transparent during normal operation while triggering before the protected circuitry sees damaging overvoltage. The clamping voltage of 15.9 V at 37.7 A peak pulse current defines the worst-case voltage the downstream components must survive.
Single bidirectional channel in DO-214AA
A single bidirectional channel protects both positive and negative transients on the same line, eliminating the need for two series devices on AC or bipolar signal paths. Surface-mount assembly suits automated pick-and-place; the tape-and-reel delivery matches production reel quantities.
Active production with no EOL signal
For BOM planning, this removes the urgency to qualify a second source today, though maintaining a cross-reference for allocation hedging is standard practice for any single-sourced line. The base product number SMBJ8.5 covers multiple breakdown voltage and polarity variants in the same DO-214AA package, allowing a last-minute swap if the 8.5 V standoff is not the final design target.