MJE521 Bipolar Transistor

Characteristics of MJE521 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 (hfe): 40
  • Operating and Storage Junction Temperature Range: -65 to +150 °C
  • Package: TO-126

Pinout of MJE521

Here is an image showing the pin diagram of this transistor.

Complementary PNP transistor

The complementary PNP transistor to the MJE521 is the MJE371.

SMD Version of MJE521 transistor

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 MJE521 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.

Replacement and Equivalent for MJE521 transistor

You can replace the MJE521 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, MJE521G, MJE800, MJE800G, MJE801, MJE801G, MJE802, MJE802G, MJE803 or MJE803G.

Lead-free Version

The MJE521G transistor is the lead-free version of the MJE521.
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