Lighting Controls

TR Series

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TR Series


Retrofit Lighting Relay


The TR Series Retrofit Lighting Relays are magnetically latching type devices with a built-in transformer for low voltage control of lighting circuits. Designed to mount in existing junction or pull boxes, these units can be connected to provide master sweep-off and sweep-on control of lighting while existing line voltage switches and wiring remain in place for local on/off and override functions. Low voltage inputs require momentary contact closures (SPDT for on/off control, SPST for off control only) and may be combined up to 40 per phase within Class 2 wiring limits. Relay contacts are 20A normally open and can switch up to a 1 hp motor load. This unique technology, which allows a single coil to serve as both a transformer secondary and a relay operator, results in a compact and economical package for both retrofit and new installations.


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QtyModelDescriptionIn StockList PriceInternet Price
  • 20A single throw latching relay output
  • Momentary contact inputs: one on, one off
  • Low voltage inputs (Class 2 for up to 40 per phase)
  • Existing line voltage switches used for override and local on/off control
  • Easy installation, transformer and relay in one package

Power supply:120 VAC or 277 VAC, 60 HZ, 3 VA max

Contact inputs:SPDT momentary only (one ON, one OFF). 15 VAC open circuit, 200 mA max switched current per relay 

Relay output:SPST, magnetically latching (fails to ON whenever power is applied to line lead). 20A tungsten, 120 VAC, 60 HZ 20A ballast, 120-277 VAC, 60 HZ 1 hp, 120-277 VAC, 60 HZ


  • 6'' #14 AWG leads for line (black) and load (blue):

  • 6'' #18 AWG lead for neutral (white or gray):

  • 6'' #20 AWG leads for ON (red), OFF (black), and common (yellow):

Approvals:UL and ULC Listed

Enclosure:Designed to be mounted within standard depth 4'' square outlet or junction box 

Dimensions:2.5'' x 2.5'' x 1.0625'' (6.4 x 6.4 x 2.7 cm) 4 cubic inches displacement (66 cubic cm)

Weight:0.3 lb. (0.14 kg)


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