Features / Technical Specifications:

• Package Type: TO-92
• Transistor Type: PNP
• Max Collector Current(I_C): -100mA
• Max Collector-Emitter Voltage (V_CE): -45V
• Max Collector-Base Voltage (V_CB): -50V
• Max Emitter-Base Voltage (VBE): -5V
• Max Collector Dissipation (Pc): 500 Milliwatt
• Max Transition Frequency (fT): 100 MHz
• Minimum & Maximum DC Current Gain (h_FE): 125 to 800
• Max Storage & Operating temperature Should be: -65 to +150Centigrade

NPN Complementary:

NPN Complementary of BC557 is BC547

Replacement and Equivalent:

Alternative transistors for BC557 are 2N3906, 2N4403, BC556, BC327 output pins of some equivalents are different please see pinout details of the equivalent transistor before replacing in the circuit.