BC537 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 40 to 400
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BC537 is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, base, and collector leads.
Here is an image showing the pin diagram of this transistor.The BC537 transistor can have a current gain of 40 to 400. The gain of the BC537-10 will be in the range from 63 to 160, for the BC537-16 it will be in the range from 100 to 250, for the BC537-25 it will be in the range from 160 to 400, for the BC537-6 it will be in the range from 40 to 100.The complementary PNP transistor to the BC537 is the BC527.You can replace the BC537 with the BC538.