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STMicroelectronics SM6T39AY — Circuit Protection

STMicroelectronics SM6T39AY TVS Diode, 600W, AEC-Q101

MPNSM6T39AY
Active

STMicroelectronics SM6T39AY, Automotive AEC-Q101, SM6TY, TRANSIL™, Zener, 600W, DO-214AA, SMB, Tape & Reel (TR); Cut Tape (CT).

$0.9900Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SM6T39AY specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM6TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown37.1V
Voltage - clamping (Max) @ ipp69.7V
Voltage - reverse standoff33.3V
Current - peak pulse (10/1000μs)57A (8/20µs)
Power - peak pulse600W
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsAutomotive
CaseDO-214AA, SMB
Unidirectional channels1

Product details

It is designed to protect sensitive downstream electronics from voltage transients on 24 V or 33 V nominal rails, with a reverse standoff voltage of 33.3 V and a maximum clamping voltage of 69.7 V at the peak pulse current. Its single unidirectional channel in a surface-mount DO-214AA (SMB) package suits automated assembly lines and high-volume production.

33.3 V standoff — what it protects

With a reverse standoff voltage (VRWM) of 33.3 V, this diode is intended for 24 V automotive systems or 33 V DC rails where normal operating voltage stays below that threshold. The breakdown voltage range starts at 37.1 V, so the part begins conducting only when the line exceeds that level, leaving the protected bus undisturbed during normal operation. The clamping voltage of 69.7 V at the rated pulse current (57 A for an 8/20 µs waveform) defines the maximum voltage the downstream circuit will see during a surge event.

Frequently asked questions

Where can I buy the SM6T39AY and get a price?

The SM6T39AY is available to order through independent distribution. Submit an RFQ to receive a current price quote and availability confirmation — no static list price is published here.

Is the SM6T39AY automotive AEC-Q101 qualified?

Yes, the SM6T39AY is part of the Automotive, AEC-Q101, SM6TY, TRANSIL™ series, confirming AEC-Q101 qualification for automotive applications.