Honeywell T451, T651 Catalog Page

Line Volt Thermostats

40

50

60

70

80

90

40 50 60 70 80 90

COOL HEAT COM

F

M6130A

2-13/16 (70)

4-17/32

(114)

1-1/8

(22)

1-13/16

(48)

15/16

(24)

1-3/4

(45)

1-1/8

(37)

17/32

(14)

3-9/32

(83)

1-15/32

(35)

9/16
(14)

T451; T651 Light and Medium Duty Line Voltage Thermostat

Light and Medium Duty Line Voltage Thermostats control line
voltage valves, motors, contractors, electric heat, elements, duct
furnaces, and fan coil units in heating/cooling systems.

• Automatic cooling and heating anticipation

• Mount on standard vertical or horizontal outlet box

Dimensions in inches (millimeters) Application: T451-Heating; T651-Heating and cooling

Dimensions, Approximate: 4 1/2 in. high x 2 15/16 in. wide x 1 1/2 in. deep

(switches and wiring terminals protrude into outlet box 3/4 in.) (115 mm high x
75 mm wide x 39 mm deep (switches and wiring terminals protrude into
outlet box 19 mm))

Electrical Ratings:

22 A @ 120 - 240 Vac Resistive
19 A @ 277 Vac Resistive

9.8 FLA / 58.8 ALR @ 120 Vac

5.6 FLA / 33.6 ALR @ 208 Vac

4.9 FLA / 29.4 ALR @240 Vac

4.2 FLA / 25.2 ALR @277 Vac

Electrical Connections: Flylead
Volt ag e: 120 Vac - 227 Vac
Frequency: 50 Hz; 60 Hz
Sensor Element: Vapor filled dual diaphragm
Color: Champagne gold face-plate with beige cover
Approvals
Canadian Standards Association: CSA Certified, File No. LR1322
Underwriters Laboratories, Inc: Listed: File No. E4436, Guide No. XAPX

Accessories:

TG511A1000-Medium Universal Thermostat Guard with clear cover and

base, and opaque wallplate Fits T822, T834, T8034, T841, T874 with
Q674, WR1F46, and others

TG511D1004-Medium Universal Thermostat Guard with Beige painted

steel cover, opaque ring base and wallplate Fits T822, T834, T8034,
T841, T874 with Q674, and others

Setting
Temperature
Range

Product Number

T451A3005/U 44 F to

86 F

T451B3004/U 50 F to

• T651A3018/U 44 F to

86 F

86 F

T651A3026/U —7 C to

* TRADELINE models • SUPER TRADELINE models

Differential
Tem pe rature

Switch
Position

Switching Action Includes(F) (C) (F) (C) System

— 2 F — — SPST- breaks on

temperature rise

— 2 F — — SPST- breaks on

— 2 F — heating and

cooling

temperature rise; with
positive off

SPDT - breaks heating
and makes cooling on
temperature rise

— 1 C heating and

28 C

cooling

SPDT - breaks heating
and makes cooling on
temperature rise

Vertical scaleplate with thermometer, range stops
and locking cover screws, wall plate,
high accuracy Dual Diaphragm sensor

Vertical scaleplate with thermometer and
high accuracy Dual Diaphragm sensor

Vertical scaleplate with thermometer,
horizontal scaleplate with no thermometer,
range stops and locking screws, wall plate,
and high accuracy Dual Diaphragm sensor

Vertical scaleplate with thermometer, range stops
and locking screws, wall plate, high accuracy
Dual Diaphragm sensor

494 customer.honeywell.com 70-6910