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Microchip Technology SMAJ15E3/TR13 — Circuit Protection

SMAJ15E3/TR13 TVS Diode, 15V Standoff, 500W

MPNSMAJ15E3/TR13
Active

Microchip Technology SMAJ15E3/TR13, Zener TVS diode, 15V reverse standoff (typ), 26.9V clamp @ 18.8A, 500W peak pulse power, unidirectional, DO-214AC (SMA) package, Tape & Reel.

$0.1800Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMAJ15E3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown16.7V
Voltage - clamping (Max) @ ipp26.9V
Voltage - reverse standoff15V
Current - peak pulse (10/1000μs)18.8A
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

15V rail clamp, 500W pulse, DO-214AC

Its 15V reverse standoff voltage means it stays off the rail below that level, then clamps at 26.9V max when the surge hits — a 1.8× clamping factor that keeps downstream silicon safe. Rated for 500W peak pulse power under the 10/1000 µs waveform, it handles 18.8A peak pulse current — enough for typical industrial and telecom board-level protection where the fault energy is limited by upstream fusing or PTCs.

DO-214AC rework and footprint reality

The SMA footprint is forgiving under a hot-air station: the pads are large enough to wet with a fine-tip iron, and the body thermal mass is low, so a 300°C hot-air profile at low flow lifts the part cleanly without cooking adjacent passives. Operating temperature spans -65°C to 150°C junction, so the part survives reflow profiles (peak 260°C) and field extremes from cold outdoor enclosures to hot motor-drive cabinets.

Active production, Tape & Reel supply

Sourced through our distribution channel against an RFQ. The base product number SMAJ15 covers the family; the /TR13 variant is the reeled, RoHS-compliant version.

Frequently asked questions

Is SMAJ15E3/TR13 bidirectional?

No — it is a unidirectional Zener TVS with one channel. The cathode band marks the polarity; it clamps positive transients only. For bidirectional protection on AC or bipolar rails, look at the SMAJ15CA variant in the same family.