277v Relay w/ Built In 24V Transformer Zoom

277v Relay w/ Built In 24V Transformer


Brand: Honeywell Aube

Honeywell Aube
Qty Price
/ each
In Stock! Ships in 24-48 Hours
(14 Available)




Description for Honeywell Aube RC840T-277


  • Direct replacement for any brand name relay
  • Built-in 24 V transformer for easy installation
  • Compatible with 24 V thermostats with 2-wire connections (R, W) or 3-wire connections (R, W, C)
  • Immediate relay activation provides improved temperature control and comfort
  • Epoxy-soundproofed relay ensures quiet operation
  • Low current consumption means multiple relays can be controlled by a single thermostat

277v Relay w/ Built In 24V Transformer


by PowerReviews
Honeywell Aube277v Relay w/ Built In 24V Transformer

(based on 1 review)

Ratings Distribution

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  • 1 Stars



Reviewed by 1 customer

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Only game in town

By Wolfman

from Northern Michigan

Verified Buyer

Comments about 277v Relay w/ Built In 24V Transformer:

This Honeywell product is the only 277v relay with a built in 24v transformer that I have found. I bought these to replace the same product which was only a few years old that were destroyed by a power surge. Could they have designed it better so that they wouldn't have literally exploded due to the power surge? Fortunately the circuit breakers tripped or I would have had a fire. Other than that, the other 9 of these that I have are working flawlessly. It would be helpful if the product materials better described how to hook them up in parallel circuits using the same thermostat. By the way I am not an HVAC professional.

  • Was this a gift?:
  • No

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