Silicon Unidirectional Switch SUS Similar to 4-Layer Diodes, but has gate electrode that permits synchronization. Vg Volts oo Nom | Pack D T $ acKage evice Type LA Max. mA Max. Min. Max, Plastic MUS4987 6.0 10 500 1.5 Case 29-02 Mus4988 7.5 9.0 150 0.5 (TO-92) Unijunction Transistors UJT Highly stable devices for general-purpose trigger applications and as pulse generators (oscillators) and timing circuits. Useful at frequencies ranging (generally) from 1 Hz to 1 MHz. Available in low-cost plastic package (TO-92) and in hermetically sealed metal package (Case 22A). \ . {p {B20 fy Pack Device Type E Vv ackage vice Typ LA Max. BA Max. mA Min. Min, Max. S/S Plastic 2N4870 0.56 0.75 5.0 1.0 2.0 Case 29-02 2N4871 0.70 0.85 5.0 1.0 4.0 (TO-92) Metal 2N2646 0.56 0.75 5.0 12 4.0 Case 22A-01 2N2647 0.68 0.82 2.0 0.2 8.0 2N4851 0.56 0.75 2.0 0.1 2.0 2N4852 0.70 0.85 2.0 0.1 4.0 2N4853 0.70 0.85 0.4 0.05 6.0 J) ne 10-8