2SD2241 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 100 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 25 W
• DC Current Gain (h_fe): 1000
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.Sometimes the "2S" prefix is not marked on the package - the 2SD2241 might only be marked "D2241".You can replace the 2SD2241 with the 2N6045, 2N6045G, 2N6532, 2SD1195, 2SD1196, 2SD1415, 2SD1415A, 2SD1829, 2SD1830, 2SD1892, 2SD1892-P, 2SD1892-Q, 2SD2495, 2SD2495-O, 2SD2495-P, 2SD2495-Y, 2SD560, 2SD560-KB, 2SD560-LB, 2SD560-MB, 2SD633, BDT63B, BDT63C, BDT65B, BDT65C, BDW42, BDW42G, BDW43, KSB601, KSB601-O, KSB601-R, KSB601-Y, KSD560, KSD560-O, KSD560-R, KSD560-Y, MJF122, MJF122G, MJF6388, MJF6388G, TIP102, TIP102G, TIP122, TIP122G, TIP132, TIP132G, TIP142T or TTD1415B.