1) Low VCE(sat) = 0.15V(Typ.) (lC / lB = 500mA / 50mA) 2) Compliments 2SB1132 / 2SB1237 Structure Epitaxial planar type NPN silicon transistor Dimensions (Unit : mm) 2SD1664 4.5+−00..12 1.6 +− 0.1.