Therm-O-Disc 66TM Circuit Breakers of Storage Tank Water Heaters

The 66TM circuit breaker from Therm-O-Disc is designed for residential electrical storage water heater. The 66TM function is to provide full power disconnect (through both power conductors) in the event of an overheat condition. 

The 66TM is a manual reset DPST – The switch opens two sets of normally closed contacts on temperature rise to provide full power disconnect of both conductors. The contacts will reset to the closed position when the reset button is depressed after the control has cooled to 90°F. Once opened, until the reset button is pressed, the contacts will not automatically reset at control temperatures above 32°F (0°C).

Max / Min available calibrations:

235°F ( 113°) maximum calibration

160°F ( 71°C) minimum calibration

Agency Ratings

UL /CSA-----277 VAC / 40 A/ 6,000 cycles

66TM 4600 301694  L85C Spec：40A 120-277VAC,25A 480VAC, T-O-D M2 RESET，125VAC PT. DTY,120-480VAC；

66TM 4600 301610  L190F Spec：40A 120-277VAC,25A 480VAC, T-O-D M2 RESET，125VAC PT. DTY,120-480VAC；

66TM 4639 301639 L220F  Spec：40A 120-277VAC,25A 480VAC, T-O-D M2 RESET，125VAC PT. DTY,120-480VAC；

66TM 4640 301672  L90C  Spec：40A 120-277VAC,25A 480VAC,T-O-D M2 RESET，125VAC PT .DTY,120-480VAC；

66TM 4660 301673  L200F  Spec：40A 120-277VAC,25A 480VAC,T-O-D M2 RESET，125VAC PT .DTY,120-480VAC；

66TM 4661 301666  L85C  Spec：40A 120-277VAC,25A 480VAC,T-O-D M2 RESET，125VAC PT.DTY,120-480VAC；

66TM 4667 301690  L95C   Spec：40A 120-277VAC,25A 480VAC,T-O-D M2 RESET，125VAC PT. DTY,120-480VAC；

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