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Microchip Technology SMAJ8.5E3/TR13 — Circuit Protection

SMAJ8.5E3/TR13 Zener TVS Diode 500W 8.5V DO-214AC

MPNSMAJ8.5E3/TR13
Active

Microchip Technology SMAJ8.5E3/TR13, Zener TVS Diode, 500W Peak Pulse Power, 8.5V Reverse Standoff, Unidirectional, DO-214AC (SMA) Package, Tape & Reel

$0.1800Ref. price · indicative, final on quote
Microchip Technology SMAJ8.5E3/TR13 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMAJ8.5E3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown9.44V
Voltage - clamping (Max) @ ipp15.9V
Voltage - reverse standoff8.5V
Current - peak pulse (10/1000μs)31.4A
Power - peak pulse500W
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-214AC, SMA
Unidirectional channels1

Product details

8.5V Zener TVS in DO-214AC — 500W Clamp for General-Purpose Rail Protection

The SMAJ8.5E3/TR13 is a unidirectional Zener TVS diode from Microchip Technology, designed to clamp transients on an 8.5V nominal rail. The 8.5V reverse standoff voltage means the diode stays transparent below that DC level, then avalanches at a minimum breakdown of 9.44V. Clamping is specified at 15.9V maximum at 31.4A peak pulse current — the voltage a downstream IC sees during a surge.

Microchip lists the SMAJ8.5E3/TR13 as Active.

The DO-214AC (SMA) package is a standard JEDEC outline — the same footprint used by Littelfuse, Vishay, and Bourns for their SMAJ-series parts.

Frequently asked questions

What is the closest pin-compatible alternative to SMAJ8.5E3/TR13 in this Circuit Protection family?

The base product number SMAJ8.5 covers the same die in the DO-214AC package. The SMAJ8.5A (bidirectional) and SMAJ8.5CA (bidirectional, different suffix) share the same footprint but differ in polarity. For a unidirectional replacement with identical ratings, any SMAJ8.5E3 variant from Microchip or a cross from Littelfuse/Vishay with the same 8.5V standoff and 500W rating will fit the board without layout changes.