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The Thomas Research Products SD3-120 Step-Dimming Series, specifically the SD3-25-120 model, is a tri-level dimming control module for use with 0-10V dimmable LED drivers. This module allows for quick switching between three levels of light output (25%, 50%, and 100%) using two standard wall switches, eliminating the need for an expensive dimmer unit. It is compatible with occupancy sensors and provides a Class 2 control output.
Key electrical specifications include an input voltage range of 100-132 Vac at 50/60 Hz, a maximum pass current of 1.0A at 120Vac input, and a maximum LED driver power of 100W. The insertion loss is less than 1.5W at 100W LED driver power. The control output is 0-10V, operating in current sinking mode with a maximum of 50mA.
Environmental specifications include a storage temperature range of -40°C to +85°C, a maximum case temperature of 75°C, and a minimum operating temperature of -40°C. The module is designed for a humidity range of 5% to 95% and has a lifetime of 1,000,000 switching cycles. UL requires that these modules be installed within the luminaire enclosure. Compatibility with non-Thomas Research Products 0-10V dimmable drivers cannot be assured.
100-132 Vac.
47-63 Hz.
100W.
0-10V Class 2 control output (current sinking only, 50mA max).
1,000,000 switching cycles.
-40°C to +85°C.
25%, 50%, and 100%.
