Merten System M 1-Pole Changeover Switch Insert, 10 A, Polar White 617119

In a modern apartment, an electrician is installing a lighting circuit that requires switching from two different locations—this Merten changeover switch insert fits flush into a standard wall box, ready to pair with a rocker and cover plate from the System M range. It is the core mechanism behind a reliable two-way switching setup, commonly used in hallways, bedrooms, or staircases.

Key specifications

• Switch type: changeover (SPDT), 1-pole
• Rated current: 10 A; rated voltage: 250 V AC
• Mounting: flush-mounted (for standard wall boxes)
• Connection: screw terminals, 1.5–2.5 mm² rigid conductors
• Material: halogen-free thermoplastic (polycarbonate)
• Protection rating: IP20; operating temperature -5 to +40 °C
• Certifications: VDE, CE
• Colour: polar white (insert only; cover plate and frame sold separately)

Why choose it

The Merten System M changeover switch insert is built for durability and safety, with a robust polycarbonate body and secure screw terminals. Its compact design fits all standard flush boxes, and the halogen-free material meets modern environmental expectations. The insert is the functional heart of a two-way switching circuit, ensuring smooth operation for years.

Ideal use cases

• Two-way lighting control in corridors, stairwells, and large rooms
• Replacement or upgrade of existing flush-mounted switches
• New electrical installations in residential and commercial buildings
• Projects requiring VDE-certified components with a clean, white aesthetic

Good to know

This is the insert only—you will need a compatible rocker and cover plate from the Merten System M range to complete the switch. The polar white colour blends seamlessly with standard white frames. Installation should be carried out by a qualified electrician in accordance with local regulations.