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Touch Plate Low Voltage CPS2 Transformer 277V

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Touch-Plate CPS-8004B transformers are specifically intended for use in pre-wired CPS relay panels, which were installed between 1985 and 2008. This CPS-8004 is to be used in panels with more than 6 relays. Panels with less than 6 relays will want to use the CPS-8002 transformer.

This transformer is used with the 3000-PL relays, never with the 2500-B or 3000 relays. Homes with 3000 relays or the discontinued 2500-B relays need to use the TPS-0120 transformer.


  • 120/277 VAC power supply
  • 20 VAC @ 2500ma, 2.50A
  • 6.3 VAC @ 4500ma, 4.50A
  • Dual Primary and Dual Secondary
  • works with CPS relay panels
  • NOT compatible with 2-wire relays 1550A, 1550B, 2500-4, 4000, and 3000
  • made in USA

Browse the Kyle Switch Plates online store for a wide range of Touch-Plate Switches & Wall Covers.

Q & A

Can I replace my CPS-8002 transformer with this CPS-8004B?
Yes. The CPS-8004B is a larger transformer, but both this one and the CPS-8002 and the CPS-8004 have the same operating voltages. Please note that the mounting bracket is slightly different on this new transformer and may require some adjustment to install. Touch-Plate CPS-8002 transverters were used only in CPS, RCP & MCP relay panels, which were sold from the 80's-late 90's. The CPS-8002 was the smaller version of the CPS8004 transformer and was discontinued several years ago.

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