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STMicroelectronics STF12NM50N — Discrete Semiconductors

STF12NM50N N-Channel MOSFET, 500V, 11A, TO-220FP

MPNSTF12NM50N
Obsolete

STMicroelectronics STF12NM50N, MDmesh™ II N-Channel MOSFET, 500 V drain-source, 11 A continuous drain, 380 mOhm Rds(on) at 10V, 30 nC gate charge, TO-220-3 Full Pack through-hole package.

$4.4200Ref. price · indicative, final on quote
STMicroelectronics STF12NM50N datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STF12NM50N specifications
ParameterValue
SeriesMDmesh™ II
FET typeN-Channel
MountingThrough Hole
Drain to source voltage500 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C11A (Tc)
Power dissipation25W (Tc)
Operating temperature150°C (TJ)
PackageTube
Vgs±25V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3 Full Pack
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs380mOhm @ 5.5A, 10V
Gate charge (Qg) (Max) @ vgs30 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds940 pF @ 50 V

Product details

500 V, 11 A MDmesh II MOSFET in a full-pack package

Maximum power dissipation is 25 W at the case, which sets the thermal budget for a given heatsink and airflow.

These numbers tell the gate-drive designer what the driver must supply per switching cycle and how fast the device can turn on and off. The ±25 V absolute maximum on the gate leaves headroom for ringing, but a gate clamp or zener is still prudent in noisy layouts.

STMicroelectronics lists the STF12NM50N as obsolete. No official successor part number appears in the record. For new production, a pin-compatible MDmesh II or MDmesh V device with similar voltage and current class would need to be evaluated — the TO-220FP footprint is common across the family, but gate charge and Rds(on) differ between generations. Date-code spread and packaging condition (sealed reels or tube-cut) vary by lot; we inspect each procurement lot for original ST branding and traceability.

Frequently asked questions

Where can I buy STF12NM50N?

Submit an RFQ for current availability, pricing, and date-code information. Each lot is verified for original ST branding and packaging integrity before shipment.