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STMicroelectronics SMAJ10CA-TR — Circuit Protection

SMAJ10CA-TR Bidirectional TVS Diode, 400W, DO-214AC

MPNSMAJ10CA-TR
Active

STMicroelectronics SMAJ, TRANSIL™ series, TVS diode, bidirectional, 10V reverse standoff, 21.7V clamping, 400W peak pulse power, DO-214AC (SMA) surface mount, -55°C to 150°C junction temperature.

$0.4400Ref. price · indicative, final on quote
STMicroelectronics SMAJ10CA-TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMAJ10CA-TR specifications
ParameterValue
TypeZener
SeriesSMAJ, TRANSIL™
MountingSurface Mount
Voltage - breakdown11.1V
Voltage - clamping (Max) @ ipp21.7V
Voltage - reverse standoff10V
Current - peak pulse (10/1000μs)106A (8/20µs)
Power - peak pulse400W
Power line protectionNo
Operating temperature-55°C ~ 150°C (TJ)
PackageTape & Reel (TR) Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AC, SMA
Bidirectional channels1

Product details

400W bidirectional TVS in a DO-214AC package

It delivers 400W peak pulse power per the 10/1000µs waveform, with a 10V reverse standoff voltage and a maximum clamping voltage of 21.7V at the peak pulse current of 106A (8/20µs).

Above that, the breakdown voltage range starts at 11.1V minimum, guaranteeing the device begins to avalanche before the line exceeds the downstream components' absolute maximum. The clamping voltage of 21.7V is the worst-case voltage the load sees during a 400W surge — this is the let-through energy the downstream circuitry must survive. For a 12V nominal rail with transients, the 10V standoff leaves enough margin to avoid false triggering from normal ripple.

Package and mounting — DO-214AC (SMA) footprint

Housed in the DO-214AC (SMA) surface-mount package, the SMAJ10CA-TR shares the same footprint as hundreds of other SMA-packaged TVS diodes and rectifiers.

For current designs, this means no forced redesign from obsolescence.

Frequently asked questions

Is SMAJ10CA-TR a bidirectional TVS diode?

Yes, it has one bidirectional channel, meaning it clamps surges of both polarities in a single device.

Can SMAJ10CA-TR replace a unidirectional SMAJ10A?

Yes, the SMAJ10CA-TR is the bidirectional version of the SMAJ10A. It is pin-compatible and can replace a unidirectional part in the same footprint, provided the circuit is designed for bidirectional clamping (e.g., AC lines or bipolar rails). For a unidirectional application, the SMAJ10A would be the correct choice.

What is SMAJ10CA-TR's listed type (Zener) on this component line?

The type is listed as Zener, which is the standard classification for TVS diodes that use the Zener/avalanche breakdown effect for clamping.