Is there a pin-compatible replacement for SMCJ36A?

SMCJ36CA and 5.0SMDJ40CAQ use the same SMC (DO-214AB) package and are pin-compatible in form factor. However, their electrical function differs (bidirectional vs. unidirectional), which requires engineering validation.

What risks should I check before replacing SMCJ36A?

The main risk is mismatching the polarity; replacing a unidirectional TVS with a bidirectional one can alter circuit behavior. Also, ensure the replacement's standoff voltage is at least 36V and its power rating is at least 1500W.

SMCJ36A Alternatives, Datasheet & Cross Reference | Microdiode Semiconductor (Shenzhen) Co., Ltd.

SMCJ36A is a popular 1500W, 36V unidirectional TVS diode in an SMC package. Finding a replacement involves matching its key electrical parameters, with special attention to polarity.

AI replacement insight

Electrical riskmedium

Using a bidirectional TVS instead of a unidirectional one requires circuit validation.

Package risklow

Candidates share the same DO-214AB (SMC) package, ensuring physical compatibility.

Can it be replaced directly?

No direct, pin-for-pin, unidirectional replacement was found. However, SMCJ36CA is a strong functional alternative if a bidirectional part is acceptable.

Best replacement path

SMCJ36CA is the closest functional alternative, being the bidirectional version of the target.

Main risk

The primary risk is the polarity difference; the target is unidirectional while the best candidates are bidirectional.

Recommended alternatives

A functional alternative with the same package, voltage, and power, but with bidirectional polarity.

View details

Alternative comparison matrix

Feature / factor	SMCJ36A	SMCJ36CA	5.0SMDJ40CAQ	Compatibility / risk
Package	DO-214AB, SMC	DO-214AB (SMC)	DO-214AB (SMC)	DO-214AB (SMC) — Same surface mount package.; 5.0SMDJ40CAQ: Same surface mount package.
Polarity Or Type	Unidirectional	Bi-directional	Bi-directional	Bi-directional — Target is unidirectional. Requires circuit review.; 5.0SMDJ40CAQ: Target is unidirectional. Requires circuit review.
Voltage V	36.0V	36.0V	40.0V	36.0V / 40.0V — Standoff voltage matches.; 5.0SMDJ40CAQ: Higher standoff voltage provides more margin.
Power W	1500.0W	1500.0W	5000.0W	1500.0W / 5000.0W — Peak pulse power matches.; 5.0SMDJ40CAQ: Significantly higher power rating.

Application & sourcing insights

Questions & answers

SMCJ36CA is a strong functional alternative, offering the same ratings but with bidirectional polarity. For an upgrade, 5.0SMDJ40CAQ provides higher power and voltage, but is also bidirectional. Both require circuit review.