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Microchip Technology SMAJ78AE3/TR13 — Circuit Protection

SMAJ78AE3/TR13 Microchip Zener TVS Diode 78V 500W DO-214AC

MPNSMAJ78AE3/TR13
Active

Microchip Technology SMAJ78AE3/TR13, Zener TVS Diode, 78V Reverse Standoff, 126V Clamping, 500W Peak Pulse Power, DO-214AC (SMA), Surface Mount, Tape & Reel

$0.3450Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMAJ78AE3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown86.7V
Voltage - clamping (Max) @ ipp126V
Voltage - reverse standoff78V
Current - peak pulse (10/1000μs)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

78V rail protection in a DO-214AC package

Its 126V clamping voltage at 4A peak pulse current (10/1000µs waveform) sets the upper limit for downstream component survival during a surge event. Rated for 500W peak pulse power, this part handles the energy of a typical industrial transient without exceeding the junction temperature limit of -65°C to 150°C.

Parametric fit for 78V bus protection

The minimum breakdown voltage is 86.7V, ensuring the diode does not conduct during normal 78V operation. Single unidirectional channel in a DO-214AC (SMA) package — the same footprint used across the SMAJ family, simplifying BOM consolidation if multiple voltage ratings are needed on the same board.

Active production — standard sourcing

Sourced to order against BOM quantities.

Frequently asked questions

Is SMAJ78AE3/TR13 RoHS compliant?

The evidence does not explicitly state RoHS compliance. Verify with the manufacturer or your compliance team before use in RoHS-restricted assemblies.

Can SMAJ78AE3/TR13 be used for 5V applications?

No — the 78V reverse standoff voltage is far above a 5V rail. For 5V protection, select a TVS with a standoff voltage near 5V, such as the SMAJ5.0A family.