TRANSISTOR, NPN, TO-126; Transistor Polarity:NPN; Collector Emitter Voltage V(br)ceo:45V; Transition Frequency Typ ft:3MHz; Power Dissipation Pd:36W; DC Collector Current:4A; DC Current Gain hFE:140; Transistor Case Style:TO-126; No. of Pins:3; SVHC:No SVHC (20-Jun-2011); Collector Emitter Voltage Vces:600mV; Continuous Collector Current Ic Max:4A; Current Ic Continuous a Max:4A; Current Ic hFE:2A; Device Marking:BD437; Full Power Rating Temperature:25°C; Gain Bandwidth ft Min:3MHz; Gain Bandwidth ft Typ:3MHz; Hfe Min:40; No. of Transistors:1; Package / Case:TO-126; Power Dissipation Pd:36W; Power Dissipation Ptot Max:36W; Termination Type:Through Hole; Voltage Vcbo:45V