Therm-O-Disc > Products > Bimetal Controls & Limits

59T Adjustable Bimetal Control

The 59T series of adjustable, automatic reset thermostats is designed to meet the high electrical capacity requirements of electric water heaters.  It’s design  uses a snap action,  temperature sensitive bimetal disc to provide long dependable control life at electric loads up to 30 amps at 250VAC.  The 59T can be supplied in combination with our 66T manual reset limit as an industry standard electric water heater temperature control/limit.

  • Single pole, single throw or single pole, double throw, open on temperature rise construction
  • 59T mounting tabs snap into industry standard mounting brackets to mount to surface of water heater tank.
  • Welded construction used on all internal current carrying components for greater electrical integrity
  • 10-32 tin plated terminal screws for electrical connections
Temperature Calibration
  • The 59T is adjustable over a range of 60°F.  The lowest available calibration is 90°F (32°C) and the highest is 200°F (93°C)
  • Standard temperature differentials available :
    • Single pole, single throw = 5-15°F ( 3-8°C)
    • Single pole, double throw = 17 - 27°F ( 9-15°C)
  • See data sheet (Product Download Tab) for detailed temperature calibration information
  • Water Heater
Agency Ratings
  • UL /CSA
    • 250VAC / 30 amps / 100,000 cycles
    • 277VAC / 25 amps / 100,000 cycles
  • See data sheet (Product Download Tab) for detailed ratings information including maximum calibration temperatures for Agency electrical ratings.