The SITAS 4AM5742-5AT10-0FA1 is a 1,000VA single-phase control transformer converting 400V to 230V at 4.35A with cage-clamp spring-loaded terminals. Electrically identical to the 5AT10-0FA0, the 0FA1 variant replaces screw terminals with tool-free cage-clamp connections for faster, vibration-resistant wiring.

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 380/400/420V. Full galvanic isolation via II0 vector group. 50/60Hz operation.

Mechanical Design

Substantial 152x144x132mm IP00 open-frame design. The cage-clamp terminals enable push-in tool-free wiring — reducing panel assembly time and providing vibration-resistant connections that do not loosen over time. Class B (130 C) insulation. Weighs approximately 15 kg.

Application

Preferred for high-volume panel builders where reduced wiring time directly impacts cost. The cage-clamp connections also suit applications subject to vibration — such as machine tools, compressors, and heavy material handling equipment — where screw terminals might loosen over time.

Decision Parameters