Version MS:
Bobbins with mounting rails for snap-on transformer claps.
Available sizes version MS:
EI 60 - EI 150N / catalog page 41
Version MS-UL:
Bobbins with mounting rails for snap-on transformer claps. Version MS-UL with greater creepage + clearance distances as version MS.
Available sizes version MS-UL:
EI 60 - EI 192 / catalog pages 42 - 43
UI 39 - UI 150 / catalog page 109