Honeywell T651A3018/U Line Voltage ThermostatHoneywell T651A3018/U Line Voltage Thermostat
Honeywell T651A3018/U Line Voltage Thermostat
HoneywellSKU: 328999

Honeywell T651A3018/U Line Voltage Thermostat

$200.51
In stock (8)

The Honeywell T651A3018/U delivers reliable temperature management across diverse HVAC applications. This line voltage thermostat operates at 120/277V AC and handles valves, motors, contactors, electric heating elements, duct furnaces, and fan coil units with precision. Its vapor-filled dual diaphragm sensor maintains a 2°F differential across a 44–86°F control range, ensuring stable performance in both heating and cooling modes. The compact design (2-15/16" W × 1-1/2" D × 4-1/2" H) fits standard mounting positions—horizontal or vertical—making installation straightforward in tight spaces. Built for light to medium-duty commercial and residential systems, this thermostat combines durability with straightforward operation.

Note, this item is now discontinued by the manufacturer.

Shipping policy

Orders placed by 2:00pm EST will ship same day, except on holidays.

More Details

Product overview

Note, this item is now discontinued by the manufacturer.

  • Automatic cooling and heating anticipation
  • Mount on standard vertical or horizontal outlet box
  • Flylead
  • 50/60 Hz frequency
  • Industrial grade Micro Switch™ mechanism rated 1/2 hp inductive, 5 kW resistive
  • Vertical mounting on 2 x 4 in NEMA standard single gang outlet box
  • High-sensitivity, vapor filled stainless steel dual diaphragm sensing element
  • Engineering plastic base to isolate sensor from switch heat and minimize droop
  • Altitude compensation
  • 44 deg F "frost protection" setting for heating application, independent of calibration or altitude
  • Color-coded leadwire connection
  • Range stops or locking cover security features for public areas
  • Champagne gold face-plate
Specifications
Manufacturer Part Number T651A3018/U
UPC 85267824347
Overall Dimensions 4-5/32 in L x 4-11/32 in W x 2-1/2 in H
Material n/a
Domestic or Import Import
End Style n/a
Type n/a
ADA Compliance n/a
Warning n/a
Standards and Approvals Guide No. XAPX | UL E4436
Resources
Delivery & Returns

Orders will ship same day if received by 2pm EST.

Upcoming holiday closures: July 3, 2026

All returns are inspected on receipt; credit is issued after condition is confirmed. Credit is issued only for items returned in original, saleable condition after inspection.

FINAL SALE ITEMS ARE NOT ELIGIBLE FOR RETURNS OR EXCHANGES.

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