S8550 Popular Low-Voltage, High-Current PNP Bipolar Junction Transistor
S8550 PNP bipolar transistor, 25V, 700 mA, TO-92
A PNP bipolar junction transistor rated at 25V collector-emitter and 700 mA collector current, used for high side switching and as the PNP complement to the S8050 in push-pull and driver stages. As a PNP device it conducts when its base is pulled low, which suits high side switching from a positive rail. Always fit a base resistor when driving it from a microcontroller pin - connecting a base directly to a logic output will damage both. A common starting value is 1K for switching applications. 25V and 700 mA rating suits moderate loads; TO-92 through-hole package fits breadboards; Very low cost and widely documented; Standard pinout for the S8550 family
Highlights
S8550 PNP bipolar transistor, 25V, 700 mA, TO-92
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