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The 59T and 66T series temperature controls from Sensience (Formerly Therm-O-Disc, Sub of Emerson Electric Co.) are designed to meet the high electrical capacity requirements of electric water heaters. Both use a temperature sensitive bimetal disc to deliver snap-action to the contacts. The speed and force of contact separation provides long-dependable control life at high electrical loads. Therm-O-Disc 59T66T thermostat combines thermostat temperature controlling and temperature limiting.

Temperature Controlling: THERM-O-DISC 59T Automatic Reset Thermostat
Features:
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.
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)
Agency Ratings:  
UL /CSA-----250VAC / 30 amps / 100,000 cycles,277VAC / 25 amps / 100,000 cycles
VDE----- 250VAC / 30 amps / 30,000 cycles

Type：

59T 4000 300529 L80C 

59T 4000 300400 L170F 

59T 4062 300490 L93C

59T 4090 300500 L150F

59T 4190 300700 L150F

59T 4196 300711 L82C

59T 4196 300709 L82C

59T 4200 300887 L82C

59T 4200 300888 L82C

59T 4235 300842 L90C

59T 4300 301000 L180F

59T 300484 L70C

59T 300800 L180F

59T 300801 L95C

59T 300825 L80F

59T 300826 L85C

59T 300842 L75C

59T 300846 L95C

59T 300851 L90C

59T 301006 L95C

59T 301011 L180F

Temperature Limiting：66T Manual Reset Bimetal Limiter

Features:
Manual reset ,double pole, single throw (“M2 Trip Free” construction)
10-32 tin plated terminal screws for electrical connections
66T standard mounting plate designed to interface with our 59T adjustable temperature control
Temperature Calibration:
Max / Min available calibrations:
235°F ( 113°) maximum calibration
160°F ( 71°C) minimum calibration

Agency Ratings: 

UL /CSA -----277 VAC / 40 amps/ 6,000 cycles
VDE----- 400VAC / 30 amps / 30 cycles
               250VAC / 40 amps / 30 cycles
               480VAC / 16 amps / 100 cycles
               250VAC / 30 amps / 100 cycles

Type:

66T 4400 301273  L86C 

66T 4401 301202  L200F

66T 4425 301235 L85C

66T 4435 301247  L98C 

66T 4444 301266  L93C

66T 4490 301300  L170F

66T 301204  L103C 

66T 301236  L97C 

66T 301243  L100C

66T 301246  L100C 

66T 301254  L200F