1500W peak pulse, 85V standoff — what the ratings mean for your rail
The SMCJ85A-13: The 85V reverse standoff voltage (VRWM) is the DC rail it protects — a 72V or 80V bus stays below the 94.4V minimum breakdown, so the diode sits high-impedance until a transient pushes the line above that threshold. Clamping voltage is 137V at the 10.4A peak pulse current. That means a surge on a nominal 85V rail gets clamped to 137V — well within the 200V rating of downstream POL converters and input capacitors typical in industrial and telecom supplies.
Housed in DO-214AB (SMC) — a standard surface-mount footprint that reflows on the same profile as 1206 passives. Operating temperature range is -55°C to +150°C (junction), covering the full industrial and telecom ambient envelope without derating.
Supplied in Tape & Reel (TR) or Cut Tape (CT) — the reel format suits automated pick-and-place; CT works for prototype or low-volume builds. Store the reels in a dry cabinet below 30°C / 60% RH per JEDEC MSL level 1 (no bake required before reflow).