MJE521G Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 40 V
• Emitter-Base Voltage, max: 4 V
• Collector Current − Continuous, max: 2 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 40
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-126
• The MJE521G is the lead-free version of the MJE521 transistor

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the MJE521G is the MJE371G.The 2SC2873 (SOT-89), 2SC2873-O (SOT-89), 2SC2873-Y (SOT-89), BCP54 (SOT-223), BCP54-10 (SOT-223), BCP54-16 (SOT-223), BCX54 (SOT-89), BCX54-10 (SOT-89), BCX54-16 (SOT-89), FMMT491A (SOT-23) and FMMT619 (SOT-23) is the SMD version of the MJE521G transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the MJE521G with the 2N6037, 2N6037G, 2N6038, 2N6038G, 2N6039, 2N6039G, 2SC2270, 2SC2270-A, 2SC2270-B, 2SC2270-C, 2SC2877, 2SC2877-O, 2SC2877-Y, 2SC3420, 2SC3420-BL, 2SC3420-GL, 2SC3420-Y, 2SC3422, 2SC3422-O, 2SC3422-Y, 2SC3785, 2SC3786, 2SC3808, 2SD1348, 2SD1348-R, 2SD1348-S, 2SD1348-T, 2SD1348-U, 2SD1509, 2SD1682, 2SD1682-R, 2SD1682-S, 2SD1682-T, 2SD1682-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, 2SD794, 2SD794-O, 2SD794-R, 2SD794-Y, 2SD794A, 2SD794A-O, 2SD794A-R, 2SD794A-Y, BD175, BD175-10, BD175-16, BD175-6, BD177, BD177-10, BD177-6, BD179, BD179-10, BD179-6, BD179G, BD187, BD189, BD233, BD233G, BD235, BD235G, BD237, BD237G, BD375, BD375-10, BD375-16, BD375-25, BD375-6, BD377, BD377-10, BD377-16, BD377-25, BD377-6, BD379, BD379-10, BD379-16, BD379-25, BD379-6, 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, KSD794, KSD794-O, KSD794-R, KSD794-Y, KSD794A, KSD794A-O, KSD794A-R, KSD794A-Y, KSE180, KSE181, KSE182, KSE800, KSE801, KSE802, KSE803, KTC2814, KTC2814-O, KTC2814-Y, MJE180, MJE180G, MJE181, MJE181G, MJE182, MJE182G, MJE220, MJE221, MJE223, MJE224, MJE240, MJE241, MJE521, MJE800, MJE800G, MJE801, MJE801G, MJE802, MJE802G, MJE803 or MJE803G.