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STMicroelectronics STP5N62K3 — Discrete Semiconductors

STP5N62K3 N-Channel MOSFET, 620 V, 4.2 A, TO-220

MPNSTP5N62K3
Obsolete

STMicroelectronics SuperMESH3™ series, N-Channel MOSFET, Through Hole, TO-220-3, 620 V drain-source, 4.2 A continuous drain at 25°C, 1.6 Ohm Rds(on) at 10 V, 70 W power dissipation.

STMicroelectronics STP5N62K3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STP5N62K3 specifications
ParameterValue
SeriesSuperMESH3™
FET typeN-Channel
MountingThrough Hole
Drain to source voltage620 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C4.2A (Tc)
Power dissipation70W (Tc)
Operating temperature-55°C~150°C(TJ)
PackageTube
Vgs±30V
TechnologyMOSFET (Metal Oxide)
CaseTO-220-3
Vgs(th) (Max) @ id4.5V @ 50µA
Rds on (Max) @ id, vgs1.6Ohm @ 2.1A, 10V
Gate charge (Qg) (Max) @ vgs26 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds680 pF @ 50 V

Product details

620 V SuperMESH3 N-channel in a TO-220

The STP5N62K3: The 26 nC typical total gate charge keeps switching losses manageable in flyback converters and offline power supplies up to about 70 W. The TO-220 through-hole package allows direct mounting to a heatsink for thermal management.

Obsolete — plan for last-time-buy or replacement

For new designs or volume production, a parametric alternative in the same SuperMESH3 family with a similar 620 V rating and TO-220 package should be evaluated.

At 10 V gate drive, the 1.6 Ω maximum on-resistance translates to about 6.7 W conduction loss at the 4.2 A continuous current rating (I²R). With a 70 W package limit at the case, the thermal margin is adequate for most flyback and forward-converter designs where the MOSFET conducts for a fraction of the switching period.

Frequently asked questions

What is the replacement for STP5N62K3?

STMicroelectronics has not published an official direct replacement for the STP5N62K3. A parametric search for a 620 V N-channel MOSFET in a TO-220 package with similar Rds(on) and gate charge will yield candidates from the same SuperMESH3 family. For a drop-in evaluation, compare the pin-compatible STP5NK60Z (600 V, 4.5 A, 1.5 Ω) — note the 20 V lower Vdss rating.