BDX44 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 90 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 5 W
• DC Current Gain (h_fe): 1000
• Transition Frequency, min: 200 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 BDX44 is the BDX47.The BSP52 (SOT-223), BSP52T1 (SOT-223), BSP52T1G (SOT-223), BSP52T3 (SOT-223) and BSP52T3G (SOT-223) is the SMD version of the BDX44 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BDX44 with the 2SD1509, 2SD1692, 2SD1692-K, 2SD1692-L, 2SD1692-M, 2SD986, 2SD986-K, 2SD986-L, 2SD986-M, BD879, KSB986, KSB986-O, KSB986-R, KSB986-Y, KSD1692, KSD1692-G, KSD1692-O, KSD1692-Y, MJE270 or MJE270G.