The Siemens SITAS 4AM4642-5AT10-0FB1 is a compact 400 VA single-phase control transformer that steps down 400 V primary to 230 V secondary for small industrial control circuits. Unlike screw-mount variants, this model features DIN rail mounting for snap-on installation — no drilling, no tools, no mounting plate required. Cage-clamp terminals further speed up wiring, making it the fastest-to-install option in the 4AM series.

Key Features

• DIN rail mountable — snap-on installation without drilling or mounting plates, ideal for standardized control panels
• Cage-clamp terminals enable fast, tool-free wiring — reducing panel assembly time
• Adjustable primary voltage taps at 380/400/420 V (±5%) compensate for supply voltage variations
• Low inrush current design simplifies primary-side protection coordination
• Compact EI 120/52 core construction: 122 × 121 × 114 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 DIN rail transformer is designed for supplying control circuits in standardized industrial control panels, machine control systems, and building automation where rapid DIN rail installation and modular panel design are priorities. The snap-on mounting eliminates drilling and reduces panel assembly time, while the compact EI-core footprint maximizes available DIN rail space. The ±5% adjustable primary taps provide adaptability for installations with fluctuating mains voltage.