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STMicroelectronics SMCJ85CA-TR — Circuit Protection

SMCJ85CA-TR STMicroelectronics TVS Diode

MPNSMCJ85CA-TR
Active

STMicroelectronics SMCJ85CA-TR, TRANSIL™ series, bidirectional TVS diode, 1500W peak pulse power, 85V reverse standoff, 94V breakdown, 178V clamping, DO-214AB (SMC) package, surface mount, -55°C to 150°C.

$0.7700Ref. price · indicative, final on quote
STMicroelectronics SMCJ85CA-TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMCJ85CA-TR specifications
ParameterValue
TypeZener
SeriesSMCJ, TRANSIL™
MountingSurface Mount
Voltage - breakdown94V
Voltage - clamping (Max) @ ipp178V
Voltage - reverse standoff85V
Current - peak pulse (10/1000μs)56A (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

1500 W of surge protection in a single bidirectional device

This part is designed for general-purpose surge protection on AC or bipolar signal lines where polarity is not fixed — the bidirectional construction means you do not need to worry about orientation during assembly or in-circuit.

For a 48 V or 60 V nominal bus with transients that could hit 150 V, this part leaves enough margin below the clamping ceiling to keep downstream silicon safe.

Package and mounting — DO-214AB (SMC)

Housed in the DO-214AB (SMC) package, this is a surface-mount device with a standard footprint shared across the SMCJ family. The SMC package is rated for the full 1500 W pulse without requiring a heatsink, relying on the PCB copper area for thermal dissipation.

Frequently asked questions

Where can I buy SMCJ85CA-TR online?

SMCJ85CA-TR is available to order through independent distribution. Submit an RFQ to confirm current availability and pricing for your required quantity.

Is SMCJ85CA-TR bidirectional?

Yes, the SMCJ85CA-TR is a bidirectional TVS diode. It has one bidirectional channel, meaning it clamps transients of either polarity without needing to orient the part on the board.

What is the peak pulse power of SMCJ85CA-TR?

The SMCJ85CA-TR is rated for 1500 W peak pulse power, measured with a 10/1000 µs waveform. This is the maximum surge energy it can absorb in a single pulse before damage.

What is the difference between SMCJ85CA-TR and SMCJ85A-TR?

The SMCJ85CA-TR is the bidirectional version; the SMCJ85A-TR is the unidirectional version. Both share the same 85 V standoff, 94 V breakdown, and 178 V clamping ratings, but the unidirectional variant has a single polarity and must be oriented correctly in a DC circuit.