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Johnson Controls A28AA-4C

Johnson Controls A28 Line Voltage Mechanical Thermostat, 30 - 110 deg F, 3.5 deg F Differential, Open/Close On Rise
SKU: 20038
Manufacturer part number: A28AA-4C
Manufacturer:

Johnson Controls


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Johnson Controls A28 Mechanical Thermostat, Line Voltage, 30 - 110 deg F, 3.5 deg F Differential, Open/Close On Rise, SPDT Switch, 2 Switches, Coil Sensor, 1-3/8 Inch Dia x 2-1/4 Inch L Sensing Bulb, 2 Stage, 24/277 VAC, 16 A, 2 Relay Inputs, 2 Relay Outputs, Flat Surface Mount, Galvanized Steel, Gray, 5-3/4 Inch L x 2-1/8 Inch W x 4-3/8 Inch H
  • Wide temperature ranges available
  • Constant differential throughout the entire range
  • Unaffected by changes in barometric pressure
  • Unaffected by cross ambient conditions
  • Compact enclosure
  • Variety of sensing element styles

Standard/Approvals: CSA Certified, UL Listed


Products specifications
Attribute nameAttribute value
ColorGray
Control Range30 - 110 deg F
Differential3.5 deg F
Dimensions5-3/4 Inch L x 2-1/8 Inch W x 4-3/8 Inch H
Enclosure TypeGalvanized Steel
Full Load Current16 A
ManufacturerJohnson Controls
Mounting TypeFlat Surface
Number of Relay Inputs2
Number of Relay Outputs2
Number of Stages2
Number of Switches2
Sensing Bulb Size1-3/8 Inch Dia x 2-1/4 Inch L
Sensor TypeCoil
SeriesA28
Switch ActionOpen/Close On Rise
Switch TypeSPDT
TypeLine Voltage
Voltage Rating24/277 VAC