The SITAS 4AM5742-4TT10-0FA0 is a 1,000VA single-phase isolation transformer with a 1:1 voltage ratio — 230V in, 230V out — providing full galvanic separation for the largest single-phase control circuits. The II0 vector group blocks common-mode noise and eliminates ground loops.

Electrical Performance

Rated at 1,000VA continuous with a short-time power rating of 5,000VA (S6 duty). The EI 150/90 core achieves approximately 93 percent efficiency. Primary taps at 218/230/242V. Full galvanic isolation — no electrical connection between primary and secondary windings.

Mechanical Design

Substantial 152x144x132mm IP00 open-frame design with screw terminals and screw mounting. Class B (130 C) insulation. Weighs approximately 15 kg.

Application

Deployed in large control panels to isolate entire PLC, drive, and instrumentation subsystems from mains-borne interference. The 1:1 ratio provides clean, isolated 230V without voltage conversion — acting as a power quality barrier for sensitive automation equipment.

Decision Parameters