The 4AM3442-4TV00-0EA0 is a 100 VA single‑phase safety isolating transformer from the SITAS range, certified to EN 61558-2-6. It provides safe galvanic isolation between the 230 V mains and the 24 V control circuit — a prerequisite for SELV and PELV circuits where personnel protection is mandatory. The single 24 V secondary winding delivers a clean, regulated voltage for contactors, relays, and sensors, with the primary side offering ±5 % taps (218 V / 230 V / 242 V) to compensate for supply voltage fluctuations without changing the transformer.

Safety and Adaptability

• Certified safety isolation: the EN 61558-2-6 certification guarantees that the 24 V side is safely separated from the mains, protecting operators from electrical shock even if a fault occurs on the primary side.
• Adjustable primary taps: 218 V, 230 V and 242 V connections allow fine adjustment of the output voltage when the supply network deviates from nominal — common in industrial areas with heavy motor loads.
• 24 V output at 4.17 A: sufficient for powering multiple contactors, relays, and small automation devices from a single transformer.

Built for Industrial Control

• 86 % efficiency: keeps heat loss low at approximately 14 W at rated load. Class B insulation (130 °C) with an 80 K temperature-rise limit ensures reliable operation within the thermal limits of a ventilated control cabinet.
• Robust EI 60/30 core: screw‑mounted iron core with a net weight of 2.2 kg, designed for stationary installation inside an enclosure (IP00).
• Operating temperature: -20 °C to +50 °C, covering factory floor and outdoor kiosk installations.

Technical Specifications