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STMicroelectronics STD20N20T4 — Discrete Semiconductors

STD20N20T4 N-Channel MOSFET, 200 V, 18 A, DPAK

MPNSTD20N20T4
Obsolete

STMicroelectronics STripFET™ II Series, N-Channel MOSFET, 200 V Vdss, 18 A Id @ 25°C, 125 mOhm Rds(on) @ 10 V, 39 nC Qg, DPAK (TO-252) surface mount.

$2.3200Ref. price · indicative, final on quote
STMicroelectronics STD20N20T4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STD20N20T4 specifications
ParameterValue
SeriesSTripFET™ II
FET typeN-Channel
MountingSurface Mount
Drain to source voltage200 V
Drive voltage (Max rds on, min rds on)10V
Current - continuous drain (Id) @ 25°C18A (Tc)
Power dissipation90W (Tc)
PackageTape & Reel (TR); Cut Tape (CT)
Vgs±20V
TechnologyMOSFET (Metal Oxide)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vgs(th) (Max) @ id4V @ 250µA
Rds on (Max) @ id, vgs125mOhm @ 10A, 10V
Gate charge (Qg) (Max) @ vgs39 nC @ 10 V
Input capacitance (Ciss) (Max) @ vds940 pF @ 25 V

Product details

Switching and drive numbers worth noting

The STD20N20T4: Gate charge totals 39 nC at 10 V. Threshold voltage maxes at 4 V with 250 µA of drain current.

STMicroelectronics lists the STD20N20T4 as obsolete. No direct pin-compatible replacement is named in the official record. For existing BOMs, the independent distribution channel is the practical source — we can quote available inventory against an RFQ. When qualifying a substitute, look for a 200 V N-channel MOSFET in DPAK with similar gate charge and on-resistance.

Frequently asked questions

What is the best replacement for STD20N20T4?

No official replacement is listed by STMicroelectronics. A suitable substitute would be a 200 V N-channel MOSFET in DPAK with comparable Rds(on) and gate charge. Parts in the STripFET™ II family like the STD20NF20 series are a starting point, but verify pin compatibility and drive voltage requirements against your design.