Skip to main content
Log in
STMicroelectronics STF11N52K3 — Discrete Semiconductors

STF11N52K3 N-Channel MOSFET, 525V, 10A, TO-220FP, Obsolete

MPNSTF11N52K3
Obsolete

STMicroelectronics SuperMESH3™ series, N-Channel MOSFET, 525 V drain-source voltage, 10 A continuous drain current, 510 mOhm Rds(on) at 10 V gate drive, TO-220-3 Full Pack through-hole package, -55°C to 150°C junction temperature.

STMicroelectronics STF11N52K3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STF11N52K3 specifications
ParameterValue
SeriesSuperMESH3™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage525 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C10A (Tc)
Power dissipation30W (Tc)
Operating temperature-55°C~150°C(TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id4.5V @ 50µA
Rds on (Max) @ id, vgs510mOhm @ 5A, 10V
Gate charge (Qg) (Max) @ vgs51 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds1400 pF @ 50 V

Product details

525 V N-Channel MOSFET in a fully isolated TO-220FP

The STF11N52K3 is marked obsolete by STMicroelectronics. Expect to work with a replacement qualification if you are sustaining a production board.

The drive voltage for achieving the rated on-resistance is 10 V (max Rds(on) condition). The threshold voltage maximum is 4.5 V at 50 µA.

Thermal and package considerations for the TO-220FP

The TO-220 Full Pack case (TO-220FP) is a fully molded, isolated package. The maximum power dissipation is 30 W at case temperature. The through-hole mounting is straightforward for rework.

Frequently asked questions

What is the replacement for STF11N52K3?

STMicroelectronics has not listed an official direct replacement in the lifecycle record. Within the SuperMESH3™ family, there are TO-220FP-packaged N-channel MOSFETs with similar or higher voltage and current ratings that may serve as functional substitutes — for example, parts with 600 V or 650 V Vdss and comparable Rds(on). Verify gate charge, threshold voltage, and switching characteristics against your design before substituting.

What is the Rds(on) of STF11N52K3?

The specified drive voltage for achieving that Rds(on) is 10 V.