Active production — 500 W Zener TVS in SQ-MELF
The 1N6131US: The clamping voltage at the 3.3 A peak pulse current is 151.3 V max.
Breakdown and clamping — what the numbers mean for your rail
Minimum breakdown voltage is 104.5 V. For a nominal 86.6 V DC rail, the TVS stays off during normal operation and only conducts when the transient pushes the line above the breakdown threshold. The 151.3 V clamping ceiling limits the voltage the downstream circuitry sees during the pulse — a critical number for selecting the voltage rating of the protected components.
SQ-MELF package and temperature range
Housed in the SQ-MELF B package, a surface-mount ceramic body with solderable end caps. The junction temperature range spans -55°C to 175°C, suiting it for avionics, downhole, and other high-temperature environments where plastic-packaged TVS diodes would degrade. The B, SQ-MELF package is the same footprint as the standard MELF but with a square body for better pick-and-place alignment. No power line protection feature — this is a unidirectional/bidirectional transient suppressor, not a rail clamp IC.