BC321B Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -45 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.15 A
• Collector Dissipation: 0.31 W
• DC Current Gain (h_fe): 200 to 450
• Noise Figure, max: 10 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BC321B 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 BC321B transistor can have a current gain of 200 to 450. The gain of the BC321 will be in the range from 110 to 800, for the BC321A it will be in the range from 110 to 220, for the BC321C it will be in the range from 420 to 800.The complementary NPN transistor to the BC321B is the BC318B.You can replace the BC321B with the BC317, BC317B, BC318, BC318B, BC320, BC320B, BCX79, HS733, KSA733, KSP55, KTC9015, KTC9015C, MPS4354, MPS6535, MPS6652, MPS6652G, MPS750, MPS750G, MPS751, MPS751G, MPSA55, MPSA55G, MPSW51, MPSW51A, MPSW51AG, MPSW51G, MPSW55, MPSW55G, NTE193, PN200 or PN4354.