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STMicroelectronics STD790AT4 — Discrete Semiconductors

STD790AT4 PNP Transistor, 3 A, 30 V, 100 MHz, DPAK

MPNSTD790AT4
Obsolete

STMicroelectronics STD790AT4, PNP bipolar transistor, 3 A Ic, 30 V Vce, 100 MHz fT, 15 W, DPAK surface mount, Tape & Reel.

STMicroelectronics STD790AT4 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STD790AT4 specifications
ParameterValue
MountingSurface Mount
FET typePNP
Voltage - collector emitter breakdown30 V
Current - collector (Ic)3 A
Current - collector cutoff10µA (ICBO)
DC current gain (hFE) (Min) @ ic, vce100 @ 500mA, 2V
Power - max15 W
Frequency - transition100MHz
Operating temperature150°C (TJ)
PackageTape & Reel (TR)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Vce saturation (Max) @ ib, ic700mV @ 100mA, 3A

Product details

PNP transistor in DPAK — 3 A, 30 V, 100 MHz

The STMicroelectronics STD790AT4 is a PNP bipolar junction transistor in a surface-mount DPAK (TO-252) package, designed for medium-current switching and linear applications. The device is rated for a maximum power dissipation of 15 W, making it suitable for power management circuits, load switches, and driver stages in industrial and consumer equipment.

No official successor part is listed by the manufacturer.

Key ratings for the BOM decision

The 3 A collector current rating defines the load-handling capability — this part can drive relays, solenoids, or medium-power loads directly. The 30 V Vce breakdown sets the maximum supply rail; designs operating from 12 V or 24 V rails have headroom. The 100 MHz transition frequency indicates adequate switching speed for PWM frequencies up to several hundred kilohertz. Saturation voltage is specified at 700 mV maximum at 100 mA base current and 3 A collector current, which matters for conduction loss in saturated-switch applications.

Frequently asked questions

What is the replacement or equivalent for STD790AT4?

No official replacement or equivalent is listed by STMicroelectronics. For a form-fit-function substitute, a parametric search for a PNP transistor in DPAK with 3 A collector current and 30 V Vce is recommended. The independent channel can also assist with cross-reference suggestions at quote time.