The SITAS 4AM4642-4TT10-0FA0 is a 400VA single-phase isolation transformer with a 1:1 voltage ratio — 230V in, 230V out — providing full galvanic separation between mains and control circuits. The II0 vector group blocks common-mode noise, ground loops, and DC components that can disrupt sensitive electronics.

Electrical Performance

Rated at 400VA continuous with a short-time power rating of 1,440VA (S6 duty). The EI 120/52 core achieves approximately 91 percent efficiency at full load. Primary taps at 218/230/242V allow adjustment for site voltage conditions. Full galvanic isolation with no electrical connection between primary and secondary.

Mechanical Design

Compact 122x121x114mm IP00 open-frame design with screw terminals and screw mounting. Class B (130 C) insulation system. Weighs approximately 5.5 kg.

Application

Used in control panels where isolation is required without voltage conversion — protecting PLCs, drives, and sensitive instrumentation from mains-borne noise. Also serves as a line reactor substitute for smaller loads where galvanic separation is the priority.

Decision Parameters