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.