The Siemens SENTRON 4AC3763-0 is the highest-power safety transformer in the SENTRON 4AC37 series at 63 VA continuous duty — the go-to choice when a single transformer must power a large bank of control relays, contactors, or building automation devices. Its dual 2×12 V secondary windings can be wired in series for 24 V at 2.62 A or in parallel for 12 V at 5.25 A — providing the current headroom needed for installations with numerous simultaneously energized relays. The 5-module (90 mm) DIN rail housing and 1.3 kg weight reflect the larger core and winding capacity. Insulation class F ensures reliable performance under continuous full-load conditions.

Key Features

• 63 VA continuous-duty — the most powerful SENTRON safety transformer available
• Dual 2×12 V windings — series for 24 V at 2.62 A or parallel for 12 V at 5.25 A
• Insulation class F — maximum thermal endurance in the series
• Built-in PTC auto-reset protection — short-circuit proof without fuses
• Safety class II, 4 kV isolation, EN 61558-2-6 certified
• 5-module (90 mm) DIN rail housing — full-size for full power

Technical Data

Applications

Large-scale building automation: multi-zone heating control panels, hotel-wide lighting contactor systems, commercial access control with numerous electric door strikes, and industrial building management systems. The 63 VA capacity handles installations with 15–20+ simultaneously energized relays or contactors from a single SELV power source.