NPN general-purpose transistor is supplied in a small SOT23 surface-mounted plastic package. It supports a 45 V collector-emitter voltage and 500 mA continuous collector current, with 1 A peak collector current for short pulses. The BC817-40 gain selection provides 250 to 600 DC current gain at 100 mA and 1 V. The device is intended for general-purpose switching and amplification over a -65 °C to 150 °C ambient and storage temperature range.
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| Transistor polarity | NPN |
| Collector-emitter voltage | 45V |
| Collector-base voltage | 50V |
| Emitter-base voltage | 5V |
| Collector current | 500mA |
| Peak collector current | 1A |
| Peak base current | 200mA |
| DC current gain | 250 to 600 at VCE = 1 V, IC = 100 mA |
| DC current gain at high current | 40 minimum at VCE = 1 V, IC = 500 mA |
| Collector-emitter saturation voltage | 700 maximum at IC = 500 mA, IB = 50 mAmV |
| Base-emitter voltage | 1.2 maximum at VCE = 1 V, IC = 500 mAV |
| Transition frequency | 100 minimumMHz |
| Collector capacitance | 3 typicalpF |
| Total power dissipation | 250 maximum on standard footprintmW |
| Junction temperature | 150 maximum°C |
| Ambient temperature range | -65 to 150°C |
| Storage temperature range | -65 to 150°C |
| Thermal resistance junction to ambient | 500 maximum on standard footprintK/W |
| Pin count | 3 |
| Marking code | 6C% |
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