147 ?2010 littelfuse, inc revised: may 10, 2010 09:33 pm teccor ? brand thyristors speci?cations are subject to change without notice. please refer to http://www.littelfuse.com for current information. teccor ? brand thyristors qxx40xx series 40 amp alternistor (high commutation) triacs 40 a triacs qxx40xx series description 40 amp bi-directional solid state switch series is designed for ac switching and phase control applications such as motor speed and temperature modulation controls, lighting controls, and static switching relays. alternistor type devices only operate in quadrants i, ii, & iii and are used in circuits requiring high dv/dt capability. main features symbol value unit i t(rms) 40 a v drm /v rrm 400 to 1000 v i gt (q1) 50 to 100 ma features & bene?ts t 3 p ) 4 $ p n q m j b o u t ( m b t t o q b t t j w b u f e junctions t 7 p m u b h f d b q b c j m j u z v q u p 1000v t 4 v s h f d b q b c j m j u z v q u p 400a t & |