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STMicroelectronics SMCJ188A-TR — Circuit Protection

STMicroelectronics SMCJ188A-TR Zener TVS, 1500 W, DO-214AB

MPNSMCJ188A-TR
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STMicroelectronics SMCJ188A-TR, TRANSIL series, Zener TVS diode, 188 V standoff, 209 V breakdown, 388 V clamping, 1500 W peak pulse, unidirectional, DO-214AB (SMC) surface mount, -55 to 150 °C.

$0.6900Ref. price · indicative, final on quote
STMicroelectronics SMCJ188A-TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMCJ188A-TR specifications
ParameterValue
TypeZener
SeriesSMCJ, TRANSIL™
MountingSurface Mount
Voltage - breakdown209V
Voltage - clamping (Max) @ ipp388V
Voltage - reverse standoff188V
Current - peak pulse (10/1000μs)26A (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
Unidirectional channels1

Product details

188 V standoff — rail protection for 150 V–200 V DC buses

Clamping voltage and breakdown window

The device triggers at a minimum breakdown of 209 V and clamps the transient to a maximum of 388 V at the rated peak pulse current of 26 A (8/20 µs). This 179 V window between standoff and clamp gives the designer margin to protect downstream semiconductors rated for 400 V or higher, while keeping the normal rail at 188 V well below the avalanche threshold.

DO-214AB SMC footprint and temperature range

Housed in a DO-214AB (SMC) surface-mount package, the SMCJ188A-TR fits standard reflow profiles and shares a footprint with other 1500 W SMC TVS diodes.

Frequently asked questions

Is SMCJ188A-TR unidirectional or bidirectional?

It is unidirectional — one channel for positive transient clamping relative to ground. For bidirectional protection on AC or bipolar rails, use a different variant in the SMCJ series.

Can I use SMCJ188A-TR as a replacement for SMCJ188A?

The base product number SMCJ188 covers both; the -TR suffix indicates Tape & Reel packaging. Electrically, SMCJ188A-TR is identical to the SMCJ188A in other packaging formats — same 188 V standoff, same 1500 W rating.