The D20 dimmer module contains two independent 20A (or 2.4kW at 120V) dimmers in a single, high-density plug-in assembly. It is constructed with a durable die-cast aluminum chassis and incorporates fully magnetic circuit breakers to prevent nuisance tripping. The module uses high-quality toroidal filters (350µS risetime for the standard D20) to ensure smooth dimming and reduce electrical noise. It is suitable for dimming various loads including incandescent, low voltage, quartz, neon, and cold-cathode lighting, as well as 2- and 4-wire fluorescent ballasts.