500W bidirectional Zener TVS — 32.7V standoff, 59.1V clamp
The reverse standoff voltage is 32.7V, breakdown minimum is 40.9V, and the clamp voltage at 8.5A peak pulse current is 59.1V. This window protects a 28V or 32V rail from transients while keeping the clamp below the 60V absolute maximum of many downstream regulators and interface ICs. Bidirectional configuration means it clamps both positive and negative surges — suited for AC signal lines, bipolar supplies, or data lines where the signal swings through zero. Single-channel, through-hole B, Axial package.
Junction temperature range and environment fit
Rated for -55°C to 175°C junction temperature. This covers automotive under-hood (125°C ambient plus self-heating), industrial motor drives, and outdoor telecom enclosures without derating the 500W pulse rating. The wide Tj range also means the reverse leakage at high temperature stays within the datasheet limit — a common failure point in cheaper TVS parts.
Microchip lists the 1N6121 as Active. Sourced per RFQ against the required quantity.