Skip to main content
Log in
Microchip Technology SMAJ43E3/TR13 — Circuit Protection

SMAJ43E3/TR13 Zener TVS Diode, 43V, 500W

MPNSMAJ43E3/TR13
Active

Microchip Technology SMAJ43E3/TR13, Zener TVS diode, unidirectional, 43V reverse standoff, 500W peak pulse power, DO-214AC (SMA) surface-mount package, Tape & Reel.

$0.1800Ref. price · indicative, final on quote
Microchip Technology SMAJ43E3/TR13 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMAJ43E3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown47.8V
Voltage - clamping (Max) @ ipp76.7V
Voltage - reverse standoff43V
Current - peak pulse (10/1000μs)6.5A
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

What this Zener TVS protects

Its 47.8V minimum breakdown voltage ensures the device starts conducting before the protected circuitry sees overvoltage, while the 76.7V maximum clamping at 6.5A peak pulse current sets the voltage ceiling the load must survive.

The device is supplied on Tape & Reel, compatible with automated pick-and-place. No power line protection feature is included — this is a signal- or secondary-side rail clamp, not a primary mains protector.

Microchip lists the SMAJ43E3/TR13 as Active.

Frequently asked questions

Is SMAJ43E3/TR13 unidirectional or bidirectional?

Unidirectional — one channel, cathode to the protected rail, anode to ground. For AC or bidirectional clamping, you would need two devices back-to-back or a dedicated bidirectional TVS.

What is the recommended replacement for SMAJ43E3/TR13?

No official successor or cross-reference is listed by Microchip. The base part number SMAJ43 covers the same die in different packaging options; confirm the specific suffix (/TR13) matches your reel and environmental requirements.