Dimmer module Harry Potter ARMPMV 400 W ST150, 400 W phase-cut control for mains lighting

Harry Potter ARMPMV 400 W ST150 is a compact dimmer module for mains lighting that supports phase-cut control with a rated load of 400 W. The unit is intended for installation in lighting circuits to allow smooth dimming of compatible incandescent, halogen and dimmable LED lamps. Its design makes it suitable for integration into residential or light-commercial electrical installations where precise adjustment of light output is required.

Advantages

The dimmer provides phase-cut dimming that is compatible with a wide range of resistive and some electronic loads, delivering smooth brightness transitions and reducing flicker with suitable lamps. Its 400 W rated capacity supports multiple luminaires on a single circuit and the compact module format simplifies installation into existing switch boxes or distribution assemblies. The device is intended to maintain stable performance under normal mains conditions and to enable straightforward manual or remote control when combined with appropriate switching systems.

Suitable for

• Dimming incandescent and halogen lamps within the rated power.
• Dimmable LED lamps that explicitly support phase-cut control.
• Residential rooms such as living rooms, bedrooms and dining areas.
• Small commercial spaces, meeting rooms and hospitality areas with compatible fixtures.

When it may not be suitable

This module may not be suitable for use with non-dimmable LED lamps, electronic ballasts for fluorescent fixtures, or other load types that do not support phase-cut dimming. For lamp combinations or fixtures with low minimum load or non-standard electronics, the dimmer may produce flicker, limited dimming range, or unreliable operation.

Key specifications

• Control method: leading or trailing edge phase-cut dimming (as provided by the model).
• Rated load capacity: 400 watts for resistive and compatible electronic loads.
• Intended supply: mains voltage operation (single-phase household/commercial mains).
• Compatibility: incandescent, halogen and compatible dimmable LED lamps.
• Form factor: compact module suitable for installation in switch boxes or distribution assemblies.

How to use

Install the dimmer module in-line within the lighting circuit following local electrical regulations and safety standards. Connect the mains live and switched live conductors according to the wiring diagram supplied by the installer or product documentation, and ensure a secure neutral connection where required by the installation type. Verify lamp compatibility before applying power and perform an initial lamp test at various dimmer positions to confirm stable dimming. For retrofits, replace the existing switch or module with the ARMPMV unit and secure the module inside the mounting box or panel.

What to consider before purchase

• Confirm lamp compatibility: only use with incandescent, halogen or dimmable LEDs rated for phase-cut dimming.
• Calculate total connected load to ensure it does not exceed 400 W.
• Check the type of phase-cut control required by the lamps (leading vs trailing edge) and whether the module matches that requirement.
• Verify space available in the mounting box for the module and wiring connections.

Usage recommendations

For reliable performance, pair the dimmer with lamps explicitly specified as dimmable and tested for phase-cut control. Avoid mixing large numbers of different lamp types on the same circuit. If you observe flicker or limited dimming range, test with alternative dimmable LEDs or consult an electrician to confirm correct wiring and load characteristics.