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STMicroelectronics SM15T150CA — Circuit Protection
STMicroelectronics

SM15T150CA TVS Diode, 1500W, 128V Reverse Standoff

MPNSM15T150CA
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STMicroelectronics SM15T150CA, TRANSIL™ series, bidirectional TVS diode, 1500W peak pulse power, 128V reverse standoff, 265V clamping, DO-214AB SMC surface-mount package, -55°C to 150°C junction.

$0.9700Ref. price · indicative, final on quote
SM15T150CA datasheet
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Specifications

SM15T150CA Technical Specifications
ParameterValue
TypeZener
SeriesSM15T, TRANSIL™
Mounting typeSurface Mount
Voltage - breakdown143V
Voltage - clamping (Max) @ ipp265V
Voltage - reverse standoff128V
Current - peak pulse (10/1000μs)38A (8/20µs)
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AB, SMC
Bidirectional channels1

Product details

What the SM15T150CA protects and how it fits

The STMicroelectronics SM15T150CA is a 1500W bidirectional TVS diode from the TRANSIL™ family, designed to clamp transients on general-purpose power and signal lines. Its 128V reverse standoff voltage means it stays transparent below that DC level, then breaks down at a minimum of 143V and clamps at 265V maximum under the 10/1000µs pulse waveform. The single bidirectional channel handles ±38A peak pulse current (8/20µs shape), making it a fit for 48V telecom rails, industrial DC buses, or any 128V-rated line that needs surge protection without polarity concerns.

Surface-mount DO-214AB SMC — footprint and reflow

The SM15T150CA comes in a DO-214AB SMC package, a standard surface-mount footprint for 1500W-class TVS diodes. It sits flat on the board with no through-hole leads, so reflow profile and solder paste volume follow the usual SMC guidelines.

Frequently asked questions

Is SM15T150CA bidirectional?

Yes, it is a single bidirectional channel. That means it clamps transients of either polarity, so you do not need to orient it on the board — useful for AC-coupled or bipolar signal lines.

What is the difference between SM15T150CA and SM15T150A?

The SM15T150A is the unidirectional version of the same die. The SM15T150CA adds a second back-to-back junction for bidirectional clamping. Electrically, the breakdown and clamping voltages are identical; the only difference is polarity handling. If your line is DC with a known ground reference, the unidirectional A version works. For AC or unknown polarity, use the CA.