OA-50 SELCO, OA-50 Datasheet - Page 57

• Manufacturer Part Number: OA-50
• Description: Disc Thermostat; 1/2 in; opens 50 degF; auto reset 32 degF; surface mt, sol tabs
• Manufacturer: SELCO

Specifications of OA-50

• Body Style: Disc
• Brand/series: OA
• Current Rating: 15⁄10 A
• Dielectric Rating: 1500 VAC per 1 Minute
• Dimensions: 1.18 in. L × 0.570 in. W × 0.395 in. H
• Function: Thermostat
• Mounting Style: Surface Mount
• Output: NC
• Primary Type: Thermostat
• Resistance, Insulation: 100 Megohms
• Standards: UL & cUL Listed, CSA Certified, VDE Approved
• Technology: Thermal Conductive
• Termination: Solder
• Thermostat Type: Disc
• Voltage, Supply: 250 VAC

Glossary of Terms
Air mount: Designed to sense the air temperature
Ambient temperature: The surrounding temperature or environmental temperature
Automatic reset: A type of thermostat that will reset itself at a specific temperature (set point - differential = reset temperature)
Bimetal: Two different metals that bond together to form the disc that actuates the thermostat when reaching a specified temperature
Close on-rise: Normally open contacts; when the temperature rises to the specified temperature the contacts close
Contact resistance: The resistance measured in ohms from across the circuit
Dielectric strength: The voltage that an insulating material can withstand before breakdown occurs
Differential: The difference between opening and closing temperatures - also known as the hysteresis
Electrical contact rating: The maximum volts and amps that the device has been tested to withstand
Exposure temperature: Thermal environment a device will see during application operation
Epoxy seal: A seal to protect against dust and moisture
Insulation resistance: Measures the resistance of the insulating member of the device to a direct voltage
FLA (Full load amps): The amount of current a motor will pull in a locked condition
Life cycles: The endurance rating of a device expressed in number of operations with stated electrical load applied
LRA (Locked rotor amps): The amount of current a motor will pull in a locked condition
Manual reset: The thermostat will remain open until it resets manually - also known as a high limit
Open on-rise: Normally closed contacts; when the temperature rises to the specified temperature the contacts open
PBT: Polybutylene Terphtalate
Phenolic: An insulating thermo-set plastic used for the body of specific thermostats
Set point: Operating temperature; temperature at which the disc changes its curvature (snaps) to open or close electrical contacts
SPST (Single pole, single throw): One set of terminals to activate or deactivate a circuit
SPDT (Single pole, double throw): An electrical switch capable of controlling two different circuits
Snap-action: Fast sudden change in temperature that will cause the bimetal to snap
Surface mount: Designed to sense temperature of the surface as opposed to the air temperature
Tolerance: An additional range above or below the nominal set point
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