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Honeywell 450035M8838 Energy Saver Thermostat Module

The Honeywell 4500 thermostat module is designed to work with Honeywell security systems featuring the 4286 phone module, enabling remote control of heating and cooling. Users can adjust the thermostat settings from any touch-tone phone, whether at home or away. A key benefit is the energy-saving 'set-back' feature, which automatically lowers the temperature when the security system is armed, reducing energy consumption during periods of vacancy. The system allows for remote adjustments to the set-back temperature. It is compatible with a range of VISTA control panels and supports optional Honeywell Audio 746 speaker.

Authorized Distributors
Source:Newark
Part No:450035M8838
Stock:11
Inv Date:06-01-2026
Price: Unit price: $66
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Source:DigiKey
Part No:450035M8838
Stock:11
Inv Date:06-01-2026
Price: Unit price: $44.64
Buy/RFQ:
Part No:450035M8838
Stock:0
Inv Date:06-02-2026
Price: N/A
Buy/RFQ:
Part No:450035M8838
Stock:7
Inv Date:06-01-2026
Price: Unit price: $44.65
Buy/RFQ:

Honeywell 450035M8838 Energy Saver Thermostat Module Specifications:

  • Operating Range: 32° to 122° F, 0° to 50° C
  • Temperature Setting Range: 45° to 99° F, 7° to 37° C
  • Air Conditioner Compressor Off Cycle: 5 minutes minimum
  • Physical Dimensions: 6-3/16" by 2-7/8" by 1-1/4"
  • Contact Rating: 800mA @ 24VAC, 400mA @ 24VDC
  • Operating Voltage: - 11 - 14Vdc
  • Operating Current: 50mA
  • Dimensions: 6-7/16" W x 1-1/4" D x 4-1/4" H
  • Vocabulary: Large vocabulary for voice description of zones
  • Voice Output Messages: Identifies open zones
  • Actions: Prompts actions
  • Phone Operation: On-site or remote phone operation
  • System Control: Checks status, arms and disarms system
  • Appliance Control: Operates lights, appliances and air conditioning
  • Speaker Support: Supports optional Honeywell Audio 746 Speaker
  • Compatible Systems: VISTA-10P VISTA-15P VISTA-20P VISTA-32FB VISTA-128B VISTA-128BP VISTA-128FB VISTA-128FBP VISTA-128FB-24 VISTA-250BP VISTA-250FBP VISTA-250FBP-24 VISTA-40 VISTA-50P VISTA-50PUL VISTA-100
  • Console Connection: Controls remote console connection points
  • DC Power: 12VDC, 220mA

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Frequently Asked Questions

Where can I buy Honeywell 450035M8838?

You can click on the BUY or RFQ button to purchase 450035M8838 from an authorized Honeywell distributor.

How do I troubleshoot issues or seek technical support for part 450035M8838?

You can download the 450035M8838 datasheet or visit the Honeywell website for support.

Who is the manufacturer of 450035M8838?

Honeywell

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