Berker 2873 Rotary Dimmer Insert for Low Voltage Halogen Lamps 20-500W with Soft Detent

Electricians and lighting designers often need a reliable dimming solution for low voltage halogen lighting in residential and commercial spaces. The Berker 2873 rotary dimmer insert is engineered for flush-mounted installation and handles loads from 20 to 500 W/VA, making it suitable for a wide range of halogen lamp configurations. Its universal phase control adapts to both electronic and conventional transformers, ensuring smooth dimming without flicker. The rotary knob features a soft detent for precise adjustment, and built-in protection against short circuits, overload, and overheating guarantees long-term safety.

Key specifications

• Product type: Rotary dimmer insert
• Application: Low voltage (NV) halogen lamps
• Compatible transformers: Electronic (capacitive) and conventional (inductive)
• Power range: 20 - 500 W/VA
• Operating voltage: 230 V AC, 50/60 Hz
• Mounting type: Flush-mounted (UP-Einsatz)
• Control principle: Universal phase control (leading/trailing edge adaptable)
• Operation: Rotary knob with soft detent (Softrastung)
• Protection: Short-circuit proof, overload protection, thermal protection
• Connection: Screw terminals
• Material: Thermoplastic (PC)
• Protection class: IP20
• Operating temperature: 0 to +35 °C
• Installation depth: Approx. 24 mm
• Series compatibility: Berker S.1, B.3, B.7, K.1, K.5, Q.1, Q.3, R.1, R.3 (requires suitable cover plate)
• Certifications: CE

Why choose it

This dimmer insert offers exceptional flexibility with its universal phase control, allowing it to work seamlessly with both electronic and conventional transformers. The soft detent rotary knob provides tactile feedback for precise light level adjustment, while the robust protection features ensure safe operation even under demanding conditions. Its compact design fits standard flush-mounted boxes and integrates with a wide range of Berker cover plates, making it a versatile choice for new installations or retrofits.

Ideal use cases

• Residential living rooms and bedrooms with low voltage halogen lighting
• Commercial spaces such as restaurants, hotels, and retail stores
• Retrofit projects where existing halogen dimmers need replacement
• Lighting scenes requiring smooth, flicker-free dimming

Good to know

The Berker 2873 is designed for use with low voltage halogen lamps only, not for LED or incandescent loads. It requires a suitable cover plate from the Berker S.1, B.3, B.7, K.1, K.5, Q.1, Q.3, R.1, or R.3 series. Installation should be performed by a qualified electrician in accordance with local regulations.