Merten 627819 Changeover Switch Insert, 10 A, 250 V, Flush-Mounted, Grey

Electricians and installers often need a reliable switch mechanism that fits seamlessly into Merten's modular system. The Merten 627819 is a changeover switch insert (SPDT) rated for 10 A and 250 V AC, designed for flush-mounted installation in standard wall boxes. It works with Merten System M, System Design, and System Fläche frames, and requires a separate rocker or toggle cover (not included) to complete the installation. The insert features screw terminals for secure wiring and a compact grey/black thermoplastic body that is halogen-free.

Key specifications

• Switch function: Changeover (SPDT)
• Rated current: 10 A
• Rated voltage: 250 V AC
• Mounting type: Flush-mounted (Unterputz)
• Connection: Screw terminals
• Number of poles: 1
• Terminal capacity: 1.5 - 2.5 mm² (rigid and flexible)
• Material: Thermoplastic, halogen-free
• Protection class: IP20 (when installed)
• Operating temperature: -5 °C to +40 °C
• Storage temperature: -25 °C to +55 °C
• Compatibility: Merten System M, System Design, System Fläche
• Number of terminals: 3
• Actuation: Rocker/toggle (separate cover required)
• Colour of insert: Grey/Black

Why choose it

This insert is built for durability and safety, with a robust thermoplastic housing that is halogen-free, reducing toxic emissions in case of fire. The screw terminals accept both rigid and flexible conductors from 1.5 to 2.5 mm², making wiring straightforward. Its changeover function allows for versatile switching applications, such as controlling a light from two locations when used with appropriate rockers. Compatibility with multiple Merten ranges ensures design flexibility across projects.

Ideal use cases

• Residential electrical installations requiring a reliable changeover switch
• Commercial buildings using Merten System M or System Design faceplates
• Retrofitting existing flush-mounted boxes with a modern switch insert
• Applications where halogen-free materials are mandated

Good to know

The Merten 627819 is supplied as an insert only; the rocker or toggle cover and frame must be ordered separately according to the desired design. It is rated IP20 for indoor use when properly installed with a compatible cover. The operating temperature range of -5 °C to +40 °C makes it suitable for most indoor environments. Always ensure installation is performed by a qualified electrician in accordance with local regulations.