KSP2222A NPN Transistor
KSP2222A is an NPN transistor hence the collector and emitter will be left open (Reverse biased) when the base pin is held at the ground and will be closed (Forward biased) when a signal is provided to the base pin. The gain value of the KSP2222A is 100 to 300, which controls the transistor's amplification capacity. Because the maximum amount of current that can flow through the Collector pin is 600mA, we can't use this transistor to connect loads that need more than 600mA. We must feed current to the base pin of a transistor to bias it, and this current (IB) should be limited to 5mA.
More details: https://www.utmel.com/componen....ts/ksp2222a-npn-tran