View src1211e datasheet:

SRC1211ENPN Silicon TransistorPIN Connection Descriptions Switching application OUT Interface circuit and driver circuit application Features IN R1OUT With built-in bias resistor IN Simplify circuit design COMMON Reduce a quantity of parts and R1 = 10K manufacturing process High packing density COMMON Ordering Information Type NO. Marking Package Code RD SRC1211E SOT-523 Device Code Year&Week Code Absolute Maximum Ratings (Ta=25C) Characteristic Symbol Rating UnitOutput voltage VO 50 VInput voltage VI 30, -5 VOutput current IO 100 mAPower dissipation PD 150 mWJunction temperature TJ 150 C Storage temperature range Tstg -55 ~ 150 C Electrical Characteristics (Ta=25C) Characteristic Symbol Test Condition Min. Typ. Max. UnitOutput cut-off current IO(OFF) VO=50V

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