2N4403 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -40 V
• Collector-Base Voltage, max: -40 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.6 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 100 to 300
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2N4403 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 complementary NPN transistor to the 2N4403 is the 2N4401.The 2SA1518 (SOT-23), 2SA1519 (SOT-23), 2SA1520 (SOT-23), 2SA1521 (SOT-23), BC807 (SOT-23), BC807W (SOT-323), BCX17 (SOT-23), KST4403 (SOT-23), MMBT4403 (SOT-23), MMST4403 (SOT-323), PMBT4403 (SOT-23) and PMST4403 (SOT-323) is the SMD version of the 2N4403 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2N4403 with the 2SA708, BC527, BC528, KN2907, KN2907A, KSA708, KSP2907A, KTN2907, KTN2907A, MPS2907, MPS2907A, MPS2907AG, MPS2907G, MPS4354, MPS4355, MPS750, MPS750G, MPS751, MPS751G, MPSW51A, MPSW51AG, P2N2907A, P2N2907AG, PN2905, PN2905A, PN2907, PN2907A, ZTX550 or ZTX951.