onsemi Transistor Polarity Onsemi MJD243G.

The MJD243G is an NPN silicon power transistor in a DPAK-3 surface-mount package, designed for low-voltage, low-power, high-gain audio amplifier applications. It has a continuous collector current rating of 4.0 A, a collector-emitter voltage of 100 V, and a total device dissipation of 1.4 W at 25°C ambient temperature. The device features a minimum DC current gain (hFE) of 40 at 200 mA collector current and a current-gain-bandwidth product of 40 MHz. It meets UL 94 V-0 flammability standards, is RoHS compliant, and is Pb-free and halogen-free. The thermal resistance from junction to case is 10°C/W, and junction temperature operates from -65°C to +150°C.