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Microchip Technology SMCJ45CE3/TR13 — Circuit Protection

SMCJ45CE3/TR13 Zener TVS Diode 1.5kW 45V DO-214AB –

MPNSMCJ45CE3/TR13
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Microchip Technology SMCJ45CE3/TR13, Zener TVS diode, 1500W peak pulse power, 45V reverse standoff voltage, bidirectional, DO-214AB (SMC) surface-mount package, Tape & Reel.

$0.5850Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

SMCJ45CE3/TR13 specifications
ParameterValue
TypeZener
MountingSurface Mount
Voltage - breakdown50V
Voltage - clamping (Max) @ ipp80.3V
Voltage - reverse standoff45V
Current - peak pulse (10/1000μs)18.7A
Power - peak pulse1500W (1.5kW)
Power line protectionNo
Operating temperature-65°C~150°C(TJ)
PackageTape & Reel (TR)
ApplicationsGeneral Purpose
CaseDO-214AB, SMC
Bidirectional channels1

Product details

What this TVS diode does on a 45V rail

Its 1500W peak pulse power rating (10/1000µs waveform) means it can absorb a 18.7A surge without failing, clamping the spike to 80.3V max. That 80.3V ceiling is what the downstream silicon sees — keep it below the absolute max of your DC-DC converter or load switch.

Breakdown, clamping, and the operating envelope

Breakdown voltage starts at 50V min, so a 45V rail sits comfortably below the knee. The device is bidirectional — one part handles both positive and negative transients, saving a diode on the board.

Frequently asked questions

What is the difference between SMCJ45CE3/TR13 and SMCJ45A?

The SMCJ45A is a unidirectional version; the SMCJ45CE3/TR13 is bidirectional. If your rail sees only positive transients, the unidirectional part works. For AC lines or floating supplies where polarity can reverse, the bidirectional saves a series diode.

Can SMCJ45CE3/TR13 be used for automotive applications?

The evidence does not list an AEC-Q101 qualification. The operating temperature range (-65°C to 150°C) covers automotive under-hood conditions, but without an explicit automotive-grade certification, verify with your quality team for production use.