Is there a pin-compatible replacement for FR107(RS1M)?

Yes, parts with the 'RS1M' designation from various manufacturers, such as MDD, are often designed as pin-compatible replacements. They share the same SMA package and electrical ratings.

What risks should I check before replacing FR107(RS1M)?

The main risk is using a standard recovery diode instead of a fast recovery one. Verify the replacement's reverse recovery time (trr) is 500ns or faster. Also, check the forward voltage (Vf) to avoid increased power loss.

FR107(RS1M) Alternatives, Datasheet & Cross Reference | KEXIN

The KEXIN FR107(RS1M) is a 1000V, 1A fast recovery rectifier in an SMA package, commonly used in switching power supplies. Key parameters for replacement are its 500ns reverse recovery time and 1.3V forward voltage.

AI replacement insight

Electrical riskhigh

Using a standard diode instead of fast recovery will likely cause failure in switching applications.

Package risklow

SMA (DO-214AC) is a standard package with good availability.

Can it be replaced directly?

Yes, MDD's RS1M is a strong candidate for direct replacement, sharing the same SMA package and key electrical specifications.

Best replacement path

Use another 'RS1M' from a reputable brand like MDD, which matches all critical parameters including the 500ns recovery time.

Main risk

Substituting with a standard recovery diode (e.g., M7/1N4007) instead of a fast recovery one, which can cause circuit failure.

Recommended alternatives

Strong pin-to-pin candidate with matching package, voltage, current, and recovery time based on datasheet evidence.

View details

Alternative comparison matrix

Feature / factor	FR107(RS1M)	RS1M	STTH112A	Compatibility / risk
Package	SMA	SMA (DO-214AC)	-	SMA (DO-214AC) — Package matches.
Voltage	1000V	1000V	-	1200V — Higher voltage rating provides more margin.
Current	1A	1A	-	1A — Forward current matches.
Recovery Time	500ns	~500ns	-	75ns — Ultrafast recovery is a significant speed upgrade.
Forward Voltage	1.3V	~1.3V	-	1.65V - 1.9V — Higher Vf will increase conduction losses.

Application & sourcing insights

Questions & answers

MDD's RS1M is an excellent candidate, matching key electrical parameters like the 1000V rating, 1A current, ~500ns recovery time, and the SMA package.