Resistor B: 4.7k Ohms. Quantity per case: 1. Semiconductor material: silicon. FT: kHz. Function: Transistor with built-in bias resistor. Minimum hFE gain: 200. Collector current: 100mA. Note: screen printing/SMD code 33. Marking on the case: *33, P33, t33, w33. Number of terminals: 3. Pd (Power Dissipation, Max): 0.25W. RoHS: yes. Assembly/installation: surface-mounted component (SMD). Housing: SOT-23 ( TO-236 ). Housing (according to data sheet): SOT-23 ( TO236 ). Type of transistor: NPN. Operating temperature: -65...+150°C. Vcbo: 50V. Saturation voltage VCE(sat): 0.1V. Collector/emitter voltage Vceo: 50V. Vebo: 5V. Spec info: R1 typ=4.7k Ohms, R2 typ=NC (open). BE diode: no. CE diode: no