Skip to main content
Log in
Microchip Technology 1N6125AUS — Circuit Protection

1N6125AUS Zener TVS Diode – Microchip, 500 W, SQ-MELF

MPN1N6125AUS
Active

Microchip Technology 1N6125AUS, Zener TVS Diode, Bidirectional, 500 W Peak Pulse Power, SQ-MELF B Package, Surface Mount

$15.2400Ref. price · indicative, final on quote
Microchip Technology 1N6125AUS datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

1N6125AUS specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown58.9V
Voltage - clamping (Max) @ ipp85.3V
Voltage - reverse standoff47.1V
Current - peak pulse (10/1000μs)5.9A
Power - peak pulse500W
Power line protectionNo
Operating temperature-55°C~175°C(TJ)
PackageBulk
ApplicationsGeneral Purpose
CaseSQ-MELF, B
Bidirectional channels1

Product details

Bidirectional Zener TVS – 47.1 V Standoff, 500 W Peak Pulse

The 1N6125AUS is a bidirectional Zener transient-voltage suppressor from Microchip Technology, designed to clamp transients on a 47.1 V reverse standoff rail to a maximum clamping voltage of 85.3 V at the peak pulse current of 5.9 A. Packaged in a SQ-MELF, B case, the 1N6125AUS is a surface-mount device suited for automated assembly on boards where through-hole TVS parts would add height or assembly steps. The SQ-MELF body offers a low-inductance path for fast transients, which matters when the clamping voltage must stay tight against the 85.3 V ceiling.

For a BOM engineer sizing protection for an outdoor telecom cabinet or an avionics power bus, the 175°C upper limit means the part does not need secondary derating when ambient temperature pushes past 85°C — the junction can run hot without shifting the 58.9 V minimum breakdown voltage.

Active Production – Sourcing Through Authorized Distribution

The base product number is 1N6125, and the 'AUS' suffix denotes the SQ-MELF surface-mount package variant.

Frequently asked questions

What is the difference between the 1N6125AUS and the 1N6125 (through-hole) variant?

The 1N6125AUS uses the SQ-MELF, B surface-mount package, while the base 1N6125 is typically a through-hole package. The electrical specs — 47.1 V standoff, 85.3 V clamp, 500 W peak pulse — are identical. The AUS suffix is the surface-mount version for designs that require a smaller footprint or automated assembly.

Can the 1N6125AUS replace a 1N6125CA in a circuit?

The 1N6125CA is a bidirectional Zener TVS with the same 47.1 V standoff and 500 W rating, but it typically comes in a DO-202AA (DO-13) through-hole package. The 1N6125AUS is the SQ-MELF surface-mount equivalent. Electrically they are interchangeable, but the footprint and mounting method differ — verify the PCB land pattern before substituting.