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| Part Number | BC557 | BC557A | BC559 | BC557B | BC558 | BC557C | BC550 | BC556 |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | onsemi | Fairchild Semiconductor | Fairchild Semiconductor | NTE Electronics, Inc | Diotec Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor |
| Product Status | Obsolete | Active | Obsolete | Obsolete | Active | Active | Obsolete | Obsolete |
| Transistor Type | PNP | PNP | PNP | PNP | PNP | - | NPN | PNP |
| Current - Collector (Ic) (Max) | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA | - | 100 mA | 100 mA |
| Voltage - Collector Emitter Breakdown (Max) | 45 V | 45 V | 30 V | 45 V | 30 V | 45 V | 45 V | 65 V |
| Vce Saturation (Max) @ Ib, Ic | 650mV @ 5mA, 100mA | 650mV @ 5mA, 100mA | 650mV @ 5mA, 100mA | 650mV @ 5mA, 100mA | 650mV @ 5mA, 100mA | - | 600mV @ 5mA, 100mA | 650mV @ 5mA, 100mA |
| Current - Collector Cutoff (Max) | 15nA (ICBO) | 15nA | 15nA (ICBO) | 100nA | 15nA (ICBO) | - | 15nA (ICBO) | 15nA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 110 @ 2mA, 5V | 110 @ 2mA, 5V | 110 @ 2mA, 5V | 180 @ 2mA, 5V | 110 @ 2mA, 5V | - | 110 @ 2mA, 5V | 110 @ 2mA, 5V |
| Power - Max | 500 mW | 500 mW | 500 mW | 625 mW | 500 mW | - | 500 mW | 500 mW |
| Frequency - Transition | 150MHz | 150MHz | 150MHz | 320MHz | 150MHz | 100MHz | 300MHz | 150MHz |
| Operating Temperature | 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) | 150°C (TJ) |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole | - | Through Hole | Through Hole |
| Package / Case | TO-226-3, TO-92-3 (TO-226AA) | TO-226-3, TO-92-3 (TO-226AA) | TO-226-3, TO-92-3 (TO-226AA) | TO-226-3, TO-92-3 (TO-226AA) Formed Leads | TO-226-3, TO-92-3 (TO-226AA) | TO-226-3, TO-92-3 (TO-226AA) | TO-226-3, TO-92-3 (TO-226AA) | TO-226-3, TO-92-3 (TO-226AA) |
| Supplier Device Package | TO-92-3 | TO-92 | TO-92-3 | TO-92 (TO-226) | TO-92-3 | - | TO-92-3 | TO-92-3 |
