Small-signal PNP for general-purpose switching and amplification
The Toshiba 2SA1162-GR,LF is a general-purpose PNP transistor in the compact S-Mini (SOT-23-3) surface-mount package. It handles up to 150 mA of continuous collector current with a 50 V collector-emitter breakdown, making it a fit for low-power switching and analog amplification in densely populated boards.
Key ratings and what they mean for the BOM
With a maximum power dissipation of 150 mW, this transistor comfortably drives loads like small relays, LEDs, or logic-level interface circuits without exceeding the thermal budget of the SOT-23-3 footprint. The DC current gain (hFE) is specified at a minimum of 200 at 2 mA collector current and 6 V Vce — the GR grade ensures a tighter gain spread, so the bias network stays predictable across the reel. The Vce saturation voltage is only 300 mV maximum at 10 mA base current and 100 mA collector current, which keeps conduction losses low when the transistor is fully on. An 80 MHz transition frequency means it can handle audio-frequency amplification and moderate-speed switching up into the low-MHz range without significant gain roll-off.
Package and board fit
Housed in the industry-standard SOT-23-3 (SC-59) footprint, the S-Mini package is a drop-in for most small-signal transistor pads. The surface-mount profile suits automated pick-and-place and reflow assembly.
Lifecycle and compliance
It is fully ROHS3 compliant, meeting the current EU restriction requirements for lead and other hazardous substances.