Berker 387603 Rotary Switch Insert Off/Two-Way for S.1930/Glass/R.classic, 10 A 250 V AC

For hallways, staircases, or large rooms where lighting needs to be controlled from two separate points, the Berker 387603 rotary switch insert delivers a robust off/two-way (changeover) function that pairs with a second switch for convenient two-location control. Unlike standard one-way switches, this insert offers three defined positions—off, position 1, and position 2—giving clear tactile feedback with every turn. It is built to integrate seamlessly into the Berker S.1930, Glass, and R.classic series, allowing you to match the switch insert with your preferred frame and rotary knob (sold separately) for a consistent interior look.

Highlights

• Off/two-way rotary switch function for two-point lighting control
• Rated 10 A at 250 V AC for reliable switching of lighting and general loads
• Screw terminal connection accepts conductors from 1.5 to 2.5 mm²
• Compatible with Berker S.1930, Glass, and R.classic frames
• Halogen-free thermoplastic construction for enhanced safety
• VDE certified for quality and electrical safety

In daily use

The rotary knob provides distinct tactile feedback, so you can quickly see or feel whether the circuit is on or off. Installation is straightforward for a flush-mounted switch insert, and the screw terminals ensure a secure, maintenance-free connection. With an IP20 rating, this insert is intended for indoor use in dry rooms only. Pair it with a matching Berker frame and rotary knob to complete your switch assembly and achieve a cohesive design across your electrical installation.

Full specifications

• Product type: Rotary switch insert
• Switch function: 1-pole off/two-way (changeover)
• Number of poles: 1
• Number of switching positions: 3 (off, position 1, position 2)
• Rated current: 10 A
• Rated voltage: 250 V AC
• Mounting type: Flush-mounted
• Connection type: Screw terminals
• Terminal capacity: 1.5 - 2.5 mm²
• Material: Thermoplastic
• Halogen-free: Yes
• Protection class: IP20
• Operating temperature range: 0 to +40 °C
• Storage temperature range: -20 to +50 °C
• Relative humidity: 5 to 95% (non-condensing)
• Certification: VDE
• Colour (insert base): White/Grey
• Compatibility: Requires Berker S.1930/R.classic/Glass frame and rotary knob (sold separately)

Final note

With its precise rotary action and compatibility across three popular Berker design lines, the 387603 is a versatile choice for electricians and homeowners seeking dependable two-way switching without compromising on aesthetics.