The Siemens SITAS 4AM5242-5AV00-0EA0 is a 630 VA single-phase safety isolating transformer that steps down 400 V primary to 42 V secondary for low-voltage control circuits. Delivering 15 A continuous with 2350 VA short-term capacity, it reliably powers 42 V safety relays, signal lamps, solenoid valves, and actuators requiring SELV-level safety isolation in industrial automation panels and machinery.

Key Features

• 42 V secondary at 15 A supplies moderate-current safety low-voltage circuits with galvanic isolation from 400 V mains
• Adjustable primary taps at 380/400/420 V (±5%) accommodate supply voltage variations
• 2350 VA short-term capacity (3.7× nominal) handles inrush from solenoid valves and actuator loads
• Safety isolating transformer per EN 61558-2-6 — suitable for SELV circuits up to 50 V AC
• Low inrush current design simplifies primary-side protection coordination
• Compact EI 150/48 core: 152 × 144 × 110 mm footprint
• 50/60 Hz dual-frequency operation for global industrial power compatibility
• IP00 open-type construction for enclosed panel or cabinet mounting

Technical Data

Applications

This safety transformer is designed for supplying 42 V control circuits in industrial machinery and automation panels — a common safety extra-low voltage used in Europe for control signaling, safety relay circuits, and actuator power where 24 V is insufficient but full mains isolation is still required. The 15 A rating supports multiple 42 V loads simultaneously, while the ±5% primary taps ensure stable output voltage under fluctuating mains conditions typical in industrial environments.