2SB1284 188Kb / 2P Collector-Emitter Sustaining Voltage-: VCEO(SUS)= -100V(Min.) BU120 190Kb / 2P Collector-Emitter Sustaining Voltage-:VCEO(SUS) = 200V(Min) 2SA1444 121Kb / 2P Collector-Emitter Sustaining Voltage-: VCEO(SUS)= -60V(Min) BUY70A 195Kb / 2P Collector-Emitter Su...