Is there a pin-compatible replacement for MBRS340T3G?

Yes, parts like B560C and B540C use the same 2-pin SMC (DO-214AB) package and are considered pin-compatible. Always verify the datasheet for exact land pattern dimensions before layout.

What risks should I check before replacing MBRS340T3G?

Key risks include package mismatch (e.g., SMC vs. SMA), insufficient voltage rating (use >40V for margin), and higher forward voltage (Vf) which increases power loss and heat.

MBRS340T3G Alternatives, Datasheet & Cross Reference | onsemi

MBRS340T3G is a 40V, 3A Schottky rectifier in an SMC package, valued for its low forward voltage. Alternatives must match the Schottky characteristics and package, while meeting or exceeding voltage and current ratings.

AI replacement insight

Electrical risklow

Many Schottky diodes have similar or better specs. Check Vf for efficiency.

Package riskhigh

Similar part numbers exist in smaller SMA packages, which are not drop-in compatible.

Can it be replaced directly?

B560C is a strong candidate for direct replacement, though its forward voltage is slightly higher. B540C is also a close match but lacks voltage margin.

Best replacement path

B560C offers upgraded voltage and current ratings in the same SMC package, making it a robust choice.

Main risk

The main risks are ensuring the replacement is a Schottky diode (not general purpose) and has an identical package footprint (SMC).

Recommended alternatives

A strong alternative in the same SMC package with higher voltage (60V) and current (5A) ratings.

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Alternative comparison matrix

Feature / factor	MBRS340T3G	B560C	B540C	Compatibility / risk
Package	SMC (DO-214AB)	SMC (DO-214AB)	-	SMC(DO-214AB) — Same package family ensures form and fit compatibility.
Voltage	40V	60V	-	40V — Identical rating lacks engineering safety margin.
Current	3A	5A	-	5A — Higher current rating provides more operational headroom.
Forward Voltage	0.5V @ 3A	0.7V @ 5A	-	0.55V @ 5A — Very close to target's Vf, minimal impact on efficiency.

Application & sourcing insights

Questions & answers

B560C is a strong alternative, offering higher voltage (60V) and current (5A) in the same SMC package. Users should verify the slightly higher forward voltage is acceptable for their design.