Is there a pin-compatible replacement for MURS260T3G?

Yes, several diodes like MURS360BT3G and STTH212U use the same SMB (DO-214AA) package and are pin-compatible. However, pin compatibility does not guarantee electrical compatibility. The switching speed (trr) is the most critical electrical parameter to verify.

What risks should I check before replacing MURS260T3G?

The main risk is performance degradation or circuit failure due to mismatched switching speed. The target is an 'ultrafast' diode (50ns trr). Using a slower diode, even one marked 'fast recovery' (e.g., 500ns), can cause excessive heat and damage. Always verify the reverse recovery time (trr) and forward voltage (Vf) from the datasheet.

MURS260T3G Alternatives, Datasheet & Cross Reference | onsemi

MURS260T3G is a 600V, 2A ultrafast rectifier from onsemi in a compact SMB package. Its key feature is a very fast 50ns reverse recovery time, making it ideal for high-frequency power supplies and converters. Finding a suitable replacement requires careful matching of this critical switching characteristic.

AI replacement insight

Electrical riskhigh

Using a standard or fast recovery diode instead of an ultrafast one will likely cause failure. Even a small increase in trr needs validation.

Package risklow

The SMB (DO-214AA) package is very common, and many candidates are form-factor compatible.

Sourcing risklow

Several ultrafast rectifiers exist in this package, but matching the 50ns trr is the main challenge.

Can it be replaced directly?

There is no exact drop-in replacement. The closest option is MURS360BT3G, which shares the same package and manufacturer but has a slightly slower switching speed that requires engineering review.

Best replacement path

The best path is to use MURS360BT3G, which is from the same onsemi family and has a higher current rating. However, its reverse recovery time is slightly slower (75ns vs 50ns), which must be verified for your specific circuit's frequency and switching characteristics.

Main risk

The primary risk is substituting a diode with a slower reverse recovery time (trr), which can lead to increased switching losses, overheating, and circuit failure in high-frequency applications.

Recommended alternatives

A functional alternate in the same package with higher current, but a slightly slower recovery time that needs review.

View details

Alternative comparison matrix

Feature / factor	MURS260T3G	MURS360BT3G	STTH212U	Compatibility / risk
Package	SMB (DO-214AA)	SMB (DO-214AA)	SMB	SMB (DO-214AA) — Mechanically compatible package.; STTH212U: Mechanically compatible package.
Voltage	600V	600V	1200V	600V / 1200V — Same reverse voltage rating.; STTH212U: Much higher voltage rating provides significant margin.
Current	2A	3A	2A	3A / 2A — Higher current rating provides more margin.; STTH212U: Same current rating.
Trr	50ns	75ns	75ns	75ns — Slower reverse recovery time may affect high-frequency switching.; STTH212U: Slower reverse recovery time may affect high-frequency switching.
Vf	1.20V	1.25V	1.5V @ 2A	1.25V / 1.5V @ 2A — Slightly higher forward voltage may increase conduction losses.; STTH212U: Higher forward voltage will increase conduction losses and heat.

Application & sourcing insights

Questions & answers

The best alternative identified is MURS360BT3G from the same manufacturer, onsemi. It offers a higher current rating (3A) in the same package, but has a slightly slower reverse recovery time (75ns vs 50ns) that must be validated for your application.