MCI Transformer Corporation’s encapsulated design of the MCI 4-11/4-12 Series of PC mount transformer offers high reliability because of its mechanical strength, electrical insulation and moisture resistance. The internal construction consists of a split bobbin which isolates the primary and secondary, thereby eliminating any need for an electrostatic shield. The construction will pass requirements of T.U.V., V.D.E., C.E., and C.S.A. Adaptations of standard transformers are also available.