20490-20493 Series Fixed Temperature Thermostats

Motor Protectors

The 20490 series is a double pole single throw (DPST) fixed temperature thermostat especially designed for electric heat, laundry, and other major appliance applications. The high capacity thermostats eliminate the need for costly backup contacts and low capacity limit controls in electric heat applications. The 20490 and 20491 are automatic reset devices. The 20492 and 20493 are manual reset and are designed for trip free operation.

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Features

Double pole single throw (DPST)
Automatic reset or manual reset/trip free
Heavy duty capacity - up to 48 amperes per pole on 20493
Snap action resists shock and vibration regardless of mounting position
UL recognized for USA and Canada (20490 only)
Tamperproof – temperatures are factory set to customer requirements
Molded phenolic case – UL V-0 rated material which seals out lint, dust, and other contamination
High Reliability

Downloads

20490-20493 Datasheet

Specifications

General Electrical

Contact Operations	Automatic reset (100K cycles) or manual reset/trip free (6K cycles)
Operating Temperature	0-300°F (automatic reset) and 100-300°F (manual reset)
Terminal Configurations	0.250” X 0.032” flat, 45°, 90° male quick connect 0.187” X 0.032” 90° male quick connect #8-32NC flat and 45° screw terminals #10-24 45° screw terminals (20493 only)

Reset Type	Auto Reset (100,000 Cycles/Pole)		Manual Reset (6,000 Cycles/Pole)
Series	20490	20491	20492	20493
Resistive	25 amperes at 240 VAC	25 amperes at 600 VAC	25 amperes at 600 VAC	48 amperes at 600 VAC
Motor Load	10 FLA-60 LRA at 120 VAC 5 FLA-30 LRA at 240 VAC	4 FLA-8 LRA at 480 VAC	10 FLA-60 LRA at 120 VAC 5 FLA-30 LRA at 240 VAC	16 FLA-96 LRA at 120 VAC 8 FLA-48 LRA at 240 VAC
Pilot Duty	125 volt-amperes at 120 VAC	690 volt-amperes at 240 VAC to 480 VAC	690 volt-amperes at 240/600 VAC 480 volt-amperes at 120 VAC	690 volt-amperes at 240/600 VAC 480 volt-amperes at 120 VAC