Catalog > Semiconductors > Discrete Semiconductors > Transistors TO126 NPN Transistor TO126 / NPN Transistor N 40V 3A 20/100 TO126 NPN Transistor Part No: 2N4921 2.70 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Lower current and voltage rating than the original TO-3 2N4921, suitable for smaller power circuits. Specifications Polarity : NPN Collector-Emitter Voltage (Vceo) : 40 V Collector-Base Voltage (Vcbo) : ~60 V Emitter-Base Voltage (Vebo) : 5–7 V Collector Current (Ic max) : 3 A Power Dissipation (Ptot) : ~40–50 W (with heatsink) Gain (hFE) : 20–100 Transition Frequency (ft) : ~20–100 MHz Package : TO-126 plastic Operating Temperature : Up to ~150 °C