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| Part Number | BC550B | BC556B | BC557B | BC558B | BC550BU | BC550C | BC550 |
|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | Fairchild Semiconductor | Fairchild Semiconductor | Fairchild Semiconductor | onsemi | onsemi | Fairchild Semiconductor |
| Product Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
| Transistor Type | NPN | PNP | PNP | PNP | NPN | NPN | NPN |
| 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 | 65 V | 45 V | 30 V | 45 V | 45 V | 45 V |
| Vce Saturation (Max) @ Ib, Ic | 600mV @ 5mA, 100mA | 650mV @ 5mA, 100mA | 650mV @ 5mA, 100mA | 650mV @ 5mA, 100mA | 600mV @ 5mA, 100mA | 600mV @ 5mA, 100mA | 600mV @ 5mA, 100mA |
| Current - Collector Cutoff (Max) | 15nA (ICBO) | 100nA | 100nA | 15nA (ICBO) | 15nA (ICBO) | 15nA (ICBO) | 15nA (ICBO) |
| DC Current Gain (hFE) (Min) @ Ic, Vce | 200 @ 2mA, 5V | 180 @ 2mA, 5V | 180 @ 2mA, 5V | 200 @ 2mA, 5V | 110 @ 2mA, 5V | 420 @ 2mA, 5V | 110 @ 2mA, 5V |
| Power - Max | 500 mW | 625 mW | 625 mW | 500 mW | 500 mW | 625 mW | 500 mW |
| Frequency - Transition | 300MHz | 280MHz | 320MHz | 150MHz | 300MHz | 250MHz | 300MHz |
| Operating Temperature | 150°C (TJ) | -55°C ~ 150°C (TJ) | -55°C ~ 150°C (TJ) | 150°C (TJ) | 150°C (TJ) | -55°C ~ 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) Formed Leads | 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 Long Body | TO-226-3, TO-92-3 (TO-226AA) |
| Supplier Device Package | TO-92-3 | TO-92 (TO-226) | TO-92 (TO-226) | TO-92-3 | TO-92-3 | TO-92 (TO-226) | TO-92-3 |
