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STMicroelectronics BYW51FP-200 — Discrete Semiconductors

BYW51FP-200 Fast Recovery Diode, 200 V 10 A, TO-220FP

MPNBYW51FP-200
Obsolete

STMicroelectronics BYW51FP-200 — dual common-cathode fast recovery rectifier, 200 V Vrrm, 10 A per diode, 35 ns trr, TO-220 Full Pack (TO-220FP) through-hole package.

STMicroelectronics BYW51FP-200 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

BYW51FP-200 specifications
ParameterValue
MountingThrough Hole
Voltage - DC reverse (Vr)200 V
Voltage - forward (Vf) (Max) @ if850 mV @ 8 A
Current - reverse leakage @ vr15 µA @ 200 V
Current - average rectified (Io) (per diode)10A
Operating temperature - junction150°C (Max)
SpeedFast Recovery =< 500ns, > 200mA (Io)
PackageTube
TechnologyStandard
CaseTO-220-3 Full Pack
Diode configuration1 Pair Common Cathode
Reverse recovery time35 ns

Product details

Dual fast-recovery diode in a fully isolated package

The TO-220 Full Pack (TO-220FP) package is fully isolated — no separate insulating washer needed, which simplifies assembly and improves thermal transfer to the heatsink.

A 35 ns reverse recovery time at 200 V reverse voltage and 8 A forward current puts this diode in the fast-recovery class. In a 100 kHz hard-switched converter, that trr keeps the recovery charge low enough to avoid excessive turn-on loss in the companion MOSFET. The 850 mV forward drop at 8 A is a reasonable trade-off for the speed — a standard recovery diode would drop less but ring through the switching node.

For rework, the three leads are on 2.54 mm pitch and the body is keyed; a standard desoldering station clears the holes cleanly.

Frequently asked questions

What is the replacement for BYW51FP-200?

There is no official STMicroelectronics successor listed for the BYW51FP-200. The BYW51-200 (non-isolated TO-220) has the same electrical ratings — 200 V, 10 A per diode, 35 ns trr — but lacks the fully isolated TO-220FP package. For a fully isolated replacement, evaluate other TO-220FP fast recovery dual diodes with matching voltage and current ratings.

What is the maximum reverse recovery time of BYW51FP-200?

The reverse recovery time (trr) is 35 ns at the rated forward current and reverse voltage conditions.

What is the difference between BYW51FP-200 and BYW51-200?

The BYW51FP-200 uses the fully isolated TO-220 Full Pack (TO-220FP) package; the BYW51-200 uses a standard TO-220 with an exposed metal tab. Electrically they share the same 200 V, 10 A per diode, 35 ns trr ratings. The FP version does not require an insulating pad for heatsink mounting.