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STMicroelectronics SMBJ85CA-TR — Circuit Protection

SMBJ85CA-TR Bidirectional TVS Diode, 600W, DO-214AA SMB

MPNSMBJ85CA-TR
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STMicroelectronics TRANSIL™ SMBJ85CA-TR, bidirectional Zener TVS diode, 85V reverse standoff, 137V clamping, 600W peak pulse power, DO-214AA SMB package, -55 to 150°C.

$0.5300Ref. price · indicative, final on quote
STMicroelectronics SMBJ85CA-TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMBJ85CA-TR specifications
ParameterValue
TypeZener
SeriesSMBJ, TRANSIL™
MountingSurface Mount
Voltage - breakdown94V
Voltage - clamping (Max) @ ipp137V
Voltage - reverse standoff85V
Current - peak pulse (10/1000μs)4.6A
Power - peak pulse600W
Power line protectionNo
Operating temperature-55°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AA, SMB
Bidirectional channels1

Product details

Bidirectional TVS for 85V rail protection

The 85V reverse standoff voltage means this part sits across a line that normally runs at 85V DC or below without conducting. The clamping voltage at 4.6A peak pulse current is 137V — that is the voltage the protected circuitry sees during a surge event.

Surface-mount DO-214AA (SMB) package — the standard footprint for 600W-class TVS diodes.

No official successor or second-source cross-reference is provided in the listing, so the SMBJ85CA-TR is the direct BOM fit for new and sustaining designs.

Frequently asked questions

Is SMBJ85CA-TR bidirectional?

Yes, the SMBJ85CA-TR has one bidirectional channel. It clamps transients of either polarity on the protected line, making it suitable for AC signal lines or DC rails where reverse polarity protection is needed.

What is the peak pulse power of SMBJ85CA-TR?

The peak pulse power rating is 600W, tested with a 10/1000µs waveform. This is the standard 600W class for SMBJ-series TVS diodes, sufficient for protecting 85V rails in industrial control and telecom equipment.