SM4T39CAY

STMicroelectronics

STMicroelectronics SM4T39CAY, Automotive AEC-Q101 TRANSIL™, Zener TVS Diode, 400W Peak Pulse, 33V Standoff, 69.7V Clamp, Bidirectional, DO-214AC SMA, -55°C to 150°C.

STMicroelectronics SM4T39CAY
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MOQ 2 · Tape & Reel (TR); Cut Tape (CT) · RoHS · EIA-481 · DAP/DDP · T/T

Technical specifications

SM4T39CAY specifications
Parameter / AttributeSpecification / Value
TypeZener
SeriesAutomotive, AEC-Q101, SM4TY, TRANSIL™
MountingSurface Mount
Voltage - breakdown36.7V
Voltage - clamping (Max) @ ipp69.7V
Voltage - reverse standoff33V
Current - peak pulse (10/1000μs)33A (8/20µs)
Power - peak pulse400W
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsAutomotive
CaseDO-214AC, SMA
Bidirectional channels1

Technical details

400 W peak pulse, 33 V standoff — what it protects

It clamps transients on a 33 V nominal rail, with a minimum breakdown voltage of 36.7 V and a maximum clamping voltage of 69.7 V at the peak pulse current.

AEC-Q101 and the automotive BOM

Package and footprint — DO-214AC (SMA)

Surface-mount in the DO-214AC (SMA) package. The single bidirectional channel means one device protects a differential pair or a single-ended rail against both positive and negative transients — no polarity concern during assembly.

SM4T39CAY
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