The 4AM4042-4TN00-0EA0 is a 160 VA single‑phase safety isolating transformer from the SITAS range, delivering an outstanding 89 % efficiency at rated load. This means less heat inside the control cabinet and lower energy consumption over the lifetime of the machine. It provides a clean, galvanically isolated 24 V supply for contactors, relays, and PLC inputs, with primary taps (218 V / 230 V / 242 V) that adjust to local mains conditions without affecting the secondary output.

High Efficiency and Lower Operating Costs

• 89 % efficiency: reduces heat loss to approximately 18 W at full load, easing the burden on cabinet cooling and extending the service life of nearby components.
• Class B insulation (130 °C): combined with an 80 K temperature-rise limit, the transformer operates well within safe thermal margins even in tightly packed enclosures.

Standardised Supply and Installation

• Adjustable primary taps: 218 V, 230 V, and 242 V connections compensate for supply voltage variations common in industrial areas.
• Single 24 V output (6.67 A): supplies a standard control voltage from a single secondary winding, simplifying wiring and distribution.
• Robust EI 84/40 core: screw‑fixed design, IP00, 3.0 kg. Dimensions 72 × 85 × 97 mm.

Technical Specifications