Project Description Punctuation Edit
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NPN pre-biased (bias resistor built-in) transistor, R1 = 10 kΩ series base resistor (B to internal base), R2 = 10 kΩ base-emitter resistor; 50 V VCEO, 100 mA IC, 200 mW, fT 250 MHz, hFE min 50. S-Mini (SC-59 / TO-236MOD / SOT-23-3), pins 1=B(input), 2=E, 3=C.