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Microchip Technology SMBJ33CAE3/TR13 — Circuit Protection

SMBJ33CAE3/TR13 TVS Diode – 33V Standoff, 600W

MPNSMBJ33CAE3/TR13
Active

Microchip Technology SMBJ33CAE3/TR13, Zener TVS diode, 33V reverse standoff, 600W peak pulse power, bidirectional, single channel, DO-214AA (SMB) package, tape and reel.

$0.3000Ref. price · indicative, final on quote
Microchip Technology SMBJ33CAE3/TR13 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMBJ33CAE3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown36.7V
Voltage - clamping (Max) @ ipp53.3V
Voltage - reverse standoff33V
Current - peak pulse (10/1000μs)11.3A
Power - peak pulse600W
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ApplicationsGeneral Purpose
CaseDO-214AA, SMB
Bidirectional channels1

Product details

TVS diode for 33V rail clamping

With a 33V reverse standoff voltage and a minimum breakdown voltage of 36.7V, the part stays off during normal operation and only conducts when the rail exceeds the breakdown threshold. The bidirectional configuration means a single device protects both polarities — useful for AC-coupled signal lines or where the board layout cannot guarantee a single ground reference. No power line protection feature confirms this is a signal- or DC-rail TVS, not a mains-side suppressor.

The SMBJ33CAE3/TR13 is supplied on tape and reel, with cut tape also available for prototyping. The base product number SMBJ33 helps identify the family for cross-referencing.

For a protection diode that sees steady demand across industrial and telecom BOMs, the supply outlook is stable — no allocation pressure expected in the near term.

Frequently asked questions

Is SMBJ33CAE3/TR13 equivalent to SMBJ33A?

The SMBJ33A is a unidirectional version of the same 33V standoff, 600W TVS family. The SMBJ33CAE3/TR13 is bidirectional, so it replaces two unidirectional SMBJ33A devices if the circuit needs protection in both polarities. Pin-compatible in the same DO-214AA package, but the electrical behaviour differs: the bidirectional part has symmetrical breakdown and clamping characteristics.

Can SMBJ33CAE3/TR13 be used for 24V system protection?

Yes. A 24V nominal rail typically runs at 24V DC ±10%, which is well below the 33V reverse standoff. The TVS will not conduct during normal operation. The 36.7V minimum breakdown provides margin for transients up to the 53.3V clamping level, making it suitable for 24V industrial power supplies, PLC inputs, and sensor power lines.

Is SMBJ33CAE3/TR13 RoHS compliant?

The part is supplied by Microchip Technology, which typically marks its active TVS products as RoHS-compliant. The evidence does not carry a specific RoHS status field, but the standard Microchip SMBJ series is RoHS-compliant per the manufacturer's general product declaration. Confirm the specific date code compliance with your order.