What this Zener TVS protects
The 1N6113AUS is a Zener-type transient voltage suppressor (TVS) diode from Microchip Technology, designed to clamp voltage transients on general-purpose circuit-protection lines. Its 500W peak pulse power rating handles moderate surge events on power rails, signal lines, and I/O ports. With a reverse standoff voltage of 15.2V and a clamping voltage of 27.7V at 18A peak pulse current, this part protects 12V and 15V rails against overvoltage spikes. The single bidirectional channel clamps both polarities, eliminating the need for two unidirectional diodes in series.
Package and mounting reality
The 1N6113AUS comes in a SQ-MELF B package (surface-mount, square MELF outline). This hermetic ceramic package offers superior moisture resistance and thermal cycling capability compared to plastic SMD packages — a key advantage in high-reliability and military-grade applications. The supplier device package is listed as B, SQ-MELF — the same form factor as other Microchip SQ-MELF TVS devices. The ceramic body allows lead-free reflow soldering.
Sourcing and production status
Because it is a hermetic ceramic package part, lead times can be longer than plastic equivalents. We source and quote to order against your BOM quantity; confirm current pricing and lead time at quote.
The 500W peak pulse power at 10/1000µs is the headline surge rating. For a 15.2V standoff rail, the clamping voltage of 27.7V means the protected circuit sees a maximum of 27.7V during a 18A transient — ensure downstream components have a breakdown voltage above 28V. The bidirectional channel simplifies layout: one device protects both positive and negative transients, saving board space and reducing component count compared to a unidirectional pair.