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Site Updated February 16, 2018

* * * Sensata > Products > Klixon Brand > Thermostats > HVAC/R + Industrial >

Klixon® 20425 Series High Current Defrost Thermostats
Snap-Action Automatic Reset

Resists shock and vibration regardless of mounting position: Klixon snap–action bimetal disc assures positive make/break action
Low–cost sealed thermostat
Sealed enclosure: sealed against dirt and moisture
Easy to mount: available with bottom, thru-wall, or tube mounting
Relative small size is ideal where space is limited
High capacity: up to 25 amps at 120 and 240 VAC resistive
UL recognized for 100,000 cycles (SA995)
Tamper–proof: temperatures are factory set
Automatic reset: recycles automatically

Klixon 20420 and 20425 thermostats are fixed-setting, low–cost snap–acting temperature controls.

These thermostats are available in single–pole, single-throw (SPST) or single–pole, double-throw (SPDT) automatic reset construction. All operating parts and lead connections are contained within a metal cup which is filled with an epoxy resin compound to completely seal out moisture, dust, or other contamination.

Temperature actuation is achieved by the Klixon snap–action bimetallic disc. The inherent snap–action of the disc provides clean, heavy-duty switching. The disc is located at the bottom of the cup where temperature change at the mounting point is quickly transmitted to give a high degree of thermal sensitivity.

A variety of mountings are available to provide a dependable and economical means of assembly.


Air conditioning
Heat pumps
Other purposes within their temperature range of operation where sealed construction is desirable
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Download Data Sheet

Download Datasheet 20425 Series (PDF file)
4 Pages
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