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STMicroelectronics STSA1805-AP — Logic ICs
STMicroelectronics

STSA1805-AP NPN Transistor, 60 V 5 A, TO-92AP, Active

MPNSTSA1805-AP
End of Life

STMicroelectronics STSA1805-AP NPN transistor, 60 V Vce, 5 A Ic, hFE min 200 at 100 mA, 150 MHz ft, 1.1 W, TO-92AP through-hole, ROHS3, Active.

$1.33Ref. price · indicative, final on quote
STSA1805-AP datasheet
PackagingTO-226-3, TO-92-3 (TO-226AA) Formed Leads
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Specifications

STSA1805-AP Technical Specifications
ParameterValue
Mounting typeThrough Hole
FET typeNPN
Voltage - collector emitter breakdown60 V
Current - collector (Ic)5 A
Current - collector cutoff100nA (ICBO)
DC current gain (hFE) (Min) @ ic, vce200 @ 100mA, 2V
Power - max1.1 W
Frequency150MHz
Operating temperature150°C (TJ)
PackageTape & Box (TB); Cut Tape (CT)
CaseTO-226-3, TO-92-3 (TO-226AA) Formed Leads
Vce saturation (Max) @ ib, ic600mV @ 200mA, 5A

Product details

60 V / 5 A NPN in a TO-92AP — what it fits

The STMicroelectronics STSA1805-AP is an NPN bipolar junction transistor rated for a collector-emitter breakdown voltage of 60 V and a continuous collector current of 5 A, housed in the TO-92AP through-hole package. The 150 MHz transition frequency keeps switching losses manageable up to a few hundred kilohertz.

Through-hole form factor and thermal budget

The TO-92AP is a formed-lead variant of the TO-92-3 (TO-226AA) outline, with leads bent for direct insertion into a 0.1-inch pitch PCB grid or socket. Maximum power dissipation is 1.1 W — derate this figure for ambient temperatures above 25 °C; at 85 °C ambient the usable power drops to roughly 0.7 W without a heatsink. The junction temperature is rated to 150 °C, so the part can handle brief overloads in a well-ventilated enclosure, but continuous operation near the 5 A peak needs attention to the thermal path.

Saturation voltage and cutoff leakage

Vce saturation is specified at 600 mV maximum with a 200 mA base drive and 5 A collector current — a reasonable on-state voltage for a TO-92 device at this current level. Collector cutoff leakage is just 100 nA maximum (ICBO), which keeps off-state power dissipation negligible in battery-powered or high-impedance circuits.

Frequently asked questions

What is the current rating of STSA1805-AP?

The continuous collector current (Ic) is rated at 5 A maximum. The collector-emitter breakdown voltage is 60 V. These are the two headline ratings that define its switching capability.

Is STSA1805-AP a Darlington transistor?

No. The STSA1805-AP is a single NPN BJT, not a Darlington pair. Its minimum DC current gain of 200 at 100 mA is typical for a medium-power single transistor, not the 1000+ gain range of a Darlington.