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Microchip Technology SMAJ43CAE3/TR13 — Circuit Protection

SMAJ43CAE3/TR13 TVS Diode – 43V Standoff, 500W

MPNSMAJ43CAE3/TR13
Active

Microchip Technology SMAJ43CAE3/TR13, Zener TVS diode, bidirectional, 43V reverse standoff, 47.8V min breakdown, 69.4V clamp, 500W peak pulse power, DO-214AC (SMA) package, Tape & Reel.

$0.1800Ref. price · indicative, final on quote
Microchip Technology SMAJ43CAE3/TR13 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMAJ43CAE3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown47.8V
Voltage - clamping (Max) @ ipp69.4V
Voltage - reverse standoff43V
Current - peak pulse (10/1000μs)7.2A
Power - peak pulse500W
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-214AC, SMA
Bidirectional channels1

Product details

43V rail protection – breakdown and clamp voltages

Its reverse standoff voltage is 43V, meaning the device does not conduct appreciably below that level. The minimum breakdown voltage is 47.8V, guaranteeing the avalanche starts before the rail sees a transient above that threshold.

500W peak pulse – surge capability in DO-214AC

Rated for 500W peak pulse power with a 10/1000 µs waveform, the device handles 7.2A peak pulse current. The DO-214AC (SMA) package is a common surface-mount footprint; the junction temperature range spans -65°C to 150°C, covering automotive under-hood and industrial environments.

Active production – no obsolescence watch needed

Frequently asked questions

Is SMAJ43CAE3/TR13 bidirectional?

Yes, it is a single bidirectional channel, protecting both positive and negative transients on the same line.

What is the power rating of SMAJ43CAE3/TR13?

Peak pulse power is 500W for a 10/1000 µs waveform, with a corresponding peak pulse current of 7.2A.

What is the closest pin-compatible alternative to SMAJ43CAE3/TR13 in this Circuit Protection family?

Within the SMAJ series, the unidirectional version (SMAJ43A) shares the same DO-214AC footprint and 43V standoff, but protects only one polarity. For a bidirectional replacement, any SMAJ43CA from Microchip or a qualified second-source with matching 43V standoff and 500W rating is a direct fit. Confirm the breakdown and clamp voltage tolerances against your design margin.