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10 Best 24v 40va thermostat ands of 2026

Explore top picks
  • Best Choice

    1

    24V 40VA Plug-in AUTO-Resetting AC Transformers, Doorbell AC Power Supply Adapter with PTC Fuse - Ring Doorbell and Thermostat, Compatible with Nest, Sensi, Honeywell - (by CENTROPOWER)
    CENTROPOWER

    24V 40VA Plug-in AUTO-Resetting AC Transformers, Doorbell AC Power Supply Adapter with PTC Fuse - Ring Doorbell and Thermostat, Compatible with Nest, Sensi, Honeywell - (by CENTROPOWER)

    9.7
    Exceptional
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  • Value for Money

    2

    BOJACK 24V 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell
    BOJACK

    BOJACK 24V 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell

    9.6
    Exceptional
    Our Rating

  • 3

    Doorbell Transformer 24V 40VA AC Power Supply Thermostat Power Adapter Hardwired Door Chime Transformer
    GIVEUBED

    Doorbell Transformer 24V 40VA AC Power Supply Thermostat Power Adapter Hardwired Door Chime Transformer

    9.5
    Excellent

  • 4

    BOJACK 24V 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell
    BOJACK

    BOJACK 24V 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell

    9.4
    Excellent
    Our Rating

  • 5

    24V 40VA Plug-in AUTO-Resetting AC Transformers, Doorbell AC Power Supply Adapter with PTC Fuse - Ring Doorbell and Thermostat, Compatible with Nest, Sensi, Honeywell - (by CENTROPOWER)
    CENTROPOWER

    24V 40VA Plug-in AUTO-Resetting AC Transformers, Doorbell AC Power Supply Adapter with PTC Fuse - Ring Doorbell and Thermostat, Compatible with Nest, Sensi, Honeywell - (by CENTROPOWER)

    9.1
    Excellent
  • See Today’s Deals & Prices

  • 6

    24V AC 40VA Transformer for Wired Doorbells & Thermostats - Hardwired Power Supply Compatible with Ring Video Doorbell Pro/2/3/4, Nest, Ecobee, Honeywell - Easy Install with 40VA Output
    VIIVRIA

    24V AC 40VA Transformer for Wired Doorbells & Thermostats - Hardwired Power Supply Compatible with Ring Video Doorbell Pro/2/3/4, Nest, Ecobee, Honeywell - Easy Install with 40VA Output

    • Power Rating:40VA
    • Usage:Residential, commercial, industrial
    • Input Voltage:120V AC 60 Hz
    • Compatibility:Ring, Nest, Ecobee, Honeywell
    • Mounting Type:Screw, thread, clamp
    8.8
    Very Good

  • 7

    VIIVRIA 24-Volt AC 40VA Plug-in Doorbell Transformer, Compatible with Ring Wired Video Doorbell, Nest, Ecobee, Sensi, and Honeywell Thermostats, Power Supply for Multiple Smart Doorbells
    VIIVRIA

    VIIVRIA 24-Volt AC 40VA Plug-in Doorbell Transformer, Compatible with Ring Wired Video Doorbell, Nest, Ecobee, Sensi, and Honeywell Thermostats, Power Supply for Multiple Smart Doorbells

    8.6
    Very Good

  • 8

    EPLZON 24V 40VA Thermostat and Doorbell Transformer, All Versions of Ring Doorbell
    EPLZON

    EPLZON 24V 40VA Thermostat and Doorbell Transformer, All Versions of Ring Doorbell

    • Power Rating:40 VA
    • Usage:Thermostats and doorbells
    • Input Voltage:120 VAC, 60 Hz
    • Compatibility:Honeywell, Sensi, Ring, Nest
    • Mounting Type:Screw down and thread clamps
    8.5
    Good

  • 9

    EPLZON 24V 40VA Thermostat and Doorbell Transformer, All Versions of Ring Doorbell
    EPLZON

    EPLZON 24V 40VA Thermostat and Doorbell Transformer, All Versions of Ring Doorbell

    • Power Rating:40 VA
    • Usage:Thermostats and doorbells
    • Input Voltage:120 VAC, 60 Hz
    • Compatibility:Honeywell, Sensi, Ring, Nest
    • Mounting Type:Screw down and thread clamps
    8.4
    Good

  • 10

    24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell，Nest, Ecobee, Sensi and Honeywell Thermostat
    WUYELIN

    24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell，Nest, Ecobee, Sensi and Honeywell Thermostat

    8.2
    Good