MJE242 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 15 W
• DC Current Gain (h_fe): 25
• Transition Frequency, min: 2 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the MJE242 is the MJE252.The BDP951 (SOT-223) is the SMD version of the MJE242 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the MJE242 with the 2N4923, 2N4923G, 2N6039, 2N6039G, 2SD1725, 2SD1725-Q, 2SD1725-R, 2SD1725-R, 2SD1725-S, BD441, BD441G, BD679, BD679A, BD679AG, BD679G, BD681, BD681G, BD779, BD789, BD791, KSE802, KSE803, MJE240, MJE241, MJE243, MJE243G, MJE244, MJE802, MJE802G, MJE803 or MJE803G.