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STMicroelectronics SMBJ24CA-TR — Circuit Protection

STMicroelectronics SMBJ24CA-TR TVS Diode, 600W Bidirectional

MPNSMBJ24CA-TR
Active

STMicroelectronics SMBJ, TRANSIL™ series, Type Zener, Bidirectional TVS Diode, 24V Reverse Standoff, 26.7V Breakdown, 38.9V Clamp, 600W Peak Pulse, 16A Ipp, DO-214AA (SMB) Surface Mount, -55°C to 150°C.

$0.4900Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMBJ24CA-TR specifications
ParameterValue
TypeZener
SeriesSMBJ, TRANSIL™
MountingSurface Mount
Voltage - breakdown26.7V
Voltage - clamping (Max) @ ipp38.9V
Voltage - reverse standoff24V
Current - peak pulse (10/1000μs)16A
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

600 W bidirectional TVS in a DO-214AA package

It delivers 600 W peak pulse power per the 10/1000 µs waveform, with a breakdown voltage window starting at 26.7 V and a maximum clamping voltage of 38.9 V at the rated 16 A peak pulse current. The DO-214AA (SMB) surface-mount package suits automated assembly for general-purpose protection on power, signal, or data lines where the circuit sees symmetrical clamping needs.

24 V rail protection — the clamping window matters

A 24 V reverse standoff voltage means this part conducts negligible leakage below that level; the rail sits safely under the standoff during normal operation. The 26.7 V minimum breakdown ensures the device starts clamping before the protected circuitry sees damage, while the 38.9 V clamp at 16 A limits the let-through voltage during a surge event. For a 24 V DC bus or a 24 VAC signal line, these three numbers define the protection corridor the designer budgets against.

Bidirectional — one device for symmetrical clamping

This eliminates the need for two unidirectional diodes back-to-back on AC signal lines or on DC rails where reverse-polarity events are possible. The part is marked as having no power line protection (it is not designed for sustained overvoltage or continuous fault conditions), so it fits best on auxiliary power inputs, I/O lines, or communication ports where the threat is a transient spike, not a sustained rail fault.

This gives design engineers and procurement teams confidence for new BOM entries and ongoing production builds.

Frequently asked questions

What is the difference between SMBJ24CA-TR and SMBJ24A-TR?

The SMBJ24CA-TR is the bidirectional version of the SMBJ24A-TR unidirectional part. Both share the same 24 V standoff voltage, 600 W peak pulse power, and DO-214AA package. The 'C' in the order code indicates bidirectional clamping; the 'A' variant clamps only one polarity. Choose the CA for AC signal lines or DC rails where reverse-polarity transients are possible, and the A for unipolar DC rails where only positive clamping is needed.