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Diodes Incorporated SMCJ43CA-13 — Circuit Protection

SMCJ43CA-13 Diodes Inc TVS Diode, 1.5 kW, Bidirectional, SMC

MPNSMCJ43CA-13
End of Life

Diodes Incorporated SMCJ43CA-13 bidirectional Zener TVS diode, 1500W peak pulse power, 43V reverse standoff, 69.4V clamp, DO-214AB (SMC) package, Tape & Reel.

$1.4700Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMCJ43CA-13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown47.8V
Voltage - clamping (Max) @ ipp69.4V
Voltage - reverse standoff43V
Current - peak pulse (10/1000μs)21.6A
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

Transient suppression for 43 V rails

The SMCJ43CA-13: The bidirectional configuration means a single device protects both polarities, simplifying BOM count on AC signal lines or bipolar supplies.

Housed in the DO-214AB (SMC) surface-mount package, the SMCJ43CA-13 occupies a standard footprint common across the SMCJ series. The SMC body size supports the 1.5 kW power dissipation without requiring an external heatsink — the copper pad area on the PCB and the solder joint to the cathode tab set the thermal resistance. The package is supplied in Tape & Reel (TR) and Cut Tape (CT) options, compatible with standard pick-and-place and reflow profiles. The device is not rated for power line protection — the spec explicitly notes no power line protection, so it is best suited for signal, data, and low-power DC rail applications where fast clamping is needed.

Frequently asked questions

Is the SMCJ43CA-13 suitable for protecting 48 V DC power rails?

Yes, the 43 V reverse standoff voltage is appropriate for 48 V nominal rails, as it sits below the typical regulation tolerance. The breakdown starts at 47.8 V minimum, so the diode does not conduct during normal operation, and the 69.4 V clamp provides a safety margin for common 60 V-rated downstream components.