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STMicroelectronics SM30T26CAY — Circuit Protection
STMicroelectronics

STMicroelectronics SM30T26CAY TVS Diode, 3000W, AEC-Q101

MPNSM30T26CAY
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STMicroelectronics SM30T26CAY, Automotive AEC-Q101 TRANSIL™ bidirectional TVS diode, 3000W peak pulse power, 22V reverse standoff, 35.5V clamping, 84.5A peak pulse current, DO-214AB SMC package, -55°C to 175°C.

$1.5000Ref. price · indicative, final on quote
SM30T26CAY datasheet
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

SM30T26CAY Technical Specifications
ParameterValue
TypeZener
SeriesAutomotive, AEC-Q101, SM30TY, TRANSIL™
Mounting typeSurface Mount
Voltage - breakdown24.4V
Voltage - clamping (Max) @ ipp35.5V
Voltage - reverse standoff22V
Current - peak pulse (10/1000μs)84.5A
Power - peak pulse3000W (3kW)
Power line protectionNo
Operating temperature-55°C~175°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsAutomotive
CaseDO-214AB, SMC
Bidirectional channels1

Product details

3000W peak pulse power — automotive-grade transient suppression

The STMicroelectronics SM30T26CAY is a bidirectional Zener TVS diode from the TRANSIL™ series, qualified to AEC-Q101 for automotive applications. Its 3000W peak pulse power rating (10/1000µs waveform) handles load-dump and ISO 7637 transients common in 12V and 24V vehicle electrical systems. The 22V reverse standoff voltage protects 24V nominal rails, with a minimum breakdown of 24.4V and a maximum clamping voltage of 35.5V at the 84.5A peak pulse current. The single bidirectional channel clamps both positive and negative surges, reducing component count on the board.

AEC-Q101 and temperature range — qualified for under-hood and harsh environments

AEC-Q101 qualification means the SM30T26CAY has passed the automotive stress tests for reliability: high-temperature reverse bias, temperature cycling, and ESD. The SMC surface-mount package is standard for power TVS diodes, with a large copper pad for heat sinking during repetitive surge events.

Sourcing and lifecycle

No official second source is listed, but the unidirectional variant shares the same package and voltage ratings, offering a design option for polarity-specific protection.

Frequently asked questions

Is SM30T26CAY AEC-Q101 qualified?

Yes, the SM30T26CAY is part of the Automotive, AEC-Q101 series, qualified for automotive-grade applications.

Does SM30T26CAY come in a unidirectional version?

The SM30T26CAY is a bidirectional device with one channel. A unidirectional variant, SM30T26A, exists in the same family and package, offering polarity-specific clamping for applications that only need one-direction protection.