Datasheet

Honeywell Sensing and Control 17
Figure 16. 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” Thermostats
The 2450R/2455R/2450RC/2455RC/2450HR/2450RCH
Series “One Shot” is a single pole, single throw, snap-
acting, non-adjustable thermostat designed as a high limit
device for applications where automatically resettable
thermostats are not desirable. A temperature-sensitive
bimetal disc, electrically and thermally isolated from the
switch, is used to actuate the normally-closed contacts.
Contacts open when surface or ambient temperatures
increase to the operating set point of the calibrated bimetal
disc. The entire switch is enclosed in a housing; the bimetal
disc is retained by a metal heat-conducting end cap. The
circuit remains open above the room ambient temperature
and will reset below -35 °C [-31 °F]. For increased
sensitivity, an exposed disc may be specified. A variety of
mounting brackets and terminals is available.
All versions are UL/CSA approved and European approved.
Potential applications include:
• Power supplies
• Appliances
• Medical equipment
• Water heaters
• Office automation
• Industrial equipment
• HVAC equipment
Table 22. 2450R/2455R/2450RC/2455RC/2450HR/2450RCH Series “One Shot” Standard Temperature Characteristics
Operating Temperature Range Tolerance °C [°F]
52 °C to 93 °C [125 °F to 200 °F] 5 [8]
94 °C to 121 °C [201 °F to 250°F] 6 [10]
122 °C to 149 °C [251 °F to 300 °F] 7 [12]
150 °C to 177 °C [301 °F to 350 °F] 8 [15]
177 °C to 204 °C [351 °F to 400 °F] 10 [18]
205 °C to 232 °C [401 °F to 450 °F] 11 [20]
232 °C to 260 °C [451 °F to 500 °F] 14 [25]