USED ALLEN-BRADLEY 837-A3

The Allen-Bradley 837-A3 is a Bulletin 837 Series electromechanical temperature control switch featuring Style A remote bulb and capillary sensing. It is designed for heavy-duty industrial applications where temperature must be maintained within preset limits, using vapor pressure technology for reliable snap-action switching. The 837-A3 is supplied in open type (without enclosure) configuration with a copper alloy bulb and capillary, and carries an adjustable operating range of 25 to 125°F.
Specification
Value
Brand
Allen-Bradley
Model / Part Number
837-A3
Bulletin / Series
Bulletin 837
Device Style
Style A — Remote Bulb and Capillary
Temperature Range (Adjustable)
25 to 125°F (-3.9 to 51.7°C)
Enclosure Type
Open Type (without enclosure)
Bulb and Capillary Material
Copper Alloy
Sensing Technology
Vapor Pressure (Capillary Tube)
Contact Configuration
SPDT (Single-Pole, Double-Throw), Snap-Action
Contact Material
Silver
Non-Inductive Rating (Voltage)
240V AC / 600V AC
Non-Inductive Rating (Current)
5A @ 240V AC; 3A @ 600V AC
Control Circuit Rating (AC)
125 VA, 24–600V AC
Control Circuit Rating (DC)
57.5 VA, 115–230V DC
Standard Capillary Length
6 ft (non-standard lengths available)
Adjustable Differential
Independently adjustable
Certifications
UL, CSA, CE
Product Status
Discontinued by Manufacturer
Weight (approx.)
0.76 lbs
We warranty all items for 30 days from date of purchase.