BD187 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 45 V
• Collector-Base Voltage, max: 55 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 40
• 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 BD187 is the BD188.The 2SD1623 (SOT-89), 2SD1623-R (SOT-89), 2SD1623-S (SOT-89), 2SD1623-T (SOT-89), 2SD1623-U (SOT-89), 2SD1624 (SOT-89), 2SD1624-R (SOT-89), 2SD1624-S (SOT-89), 2SD1624-T (SOT-89) and 2SD1624-U (SOT-89) is the SMD version of the BD187 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD187 with the 2N6038, 2N6038G, 2N6039, 2N6039G, 2SD1348, 2SD1348-R, 2SD1348-S, 2SD1348-T, 2SD1348-U, 2SD1683, 2SD1683-R, 2SD1683-S, 2SD1683-T, 2SD1683-U, 2SD1722, 2SD1722-Q, 2SD1722-R, 2SD1722-R, 2SD1722-S, 2SD1723, 2SD1723-Q, 2SD1723-R, 2SD1723-R, 2SD1723-S, BD189, BD439, BD439G, BD441, BD441G, BD675, BD675A, BD675AG, BD675G, BD677, BD677A, BD677AG, BD677G, BD679, BD679A, BD679AG, BD679G, BD775, BD777, BD779, BD785, BD787, BD787G, BD789, BDX35, BDX36, BDX37, KSE800, KSE801, KSE802, KSE803, MJE223, MJE224, MJE240, MJE241, MJE800, MJE800G, MJE801, MJE801G, MJE802, MJE802G, MJE803 or MJE803G.