2N4922 NPN General Purpose Transistor

The 2N4922 is an NPN silicon power transistor in the TO-126 plastic package, designed for driver circuits, switching, and amplifier applications where moderate current and voltage handling are needed. It’s rated for 60V VCEO/VCBO with 1A of continuous collector current and a 30W dissipation figure, giving it enough headroom for small motor and lamp drivers, audio driver stages, and general power switching.

Its low saturation voltage — 0.6V max at 1A — helps keep switching losses down compared to older power-transistor designs, and its hFE, while modest by small-signal standards (10–150 depending on current), is typical for this power class.

1. Low saturation voltage — VCE(sat) = 0.6V max at 1A
2. 60V collector-emitter and collector-base voltage
3. 1A continuous collector current
4. 30W power dissipation, TO-126 package
5. Suited to driver circuits, switching, and amplifier applications
6. hFE of 40 at 50mA, down to 10 at 1A