| BW-ABJ | BW-ABS |
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| BW-CBJ | BW-CBS |
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| BW-CKJ | BW-CKS |
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TOPRO BW9700 series Thermal Protectors and Thermal Switches adopt bimetal discs that bend when the temperature changes as the temperature sensing element. Without other auxiliary structures, only by the temperature sensing ability of the bimetal disc itself and the electrical heat effect, when the ambient temperature rises to the preset operating temperature, the bimetal disc snaps quickly to break the circuit automatically. When the electrical appliance is cooled down to the reset temperature, the bimetal disc bends back to connect the circuit, thus protecting the electrical appliance from overheat and overload.
TOPRO BW9700 series thermal protector and Thermal Switches are featured by advanced bimetal disc structure, miniature size, snap action, large contact capacity, and long service life. They are widely used for overheat and overcurrent protection in various electric motors, electromagnetic oven, vacuum cleaner, air conditioner motor, solenoid, transformer, electrical heater, electrical heating appliances, fluorescent ballasts, automobile motors, integrated circuits and common electrical appliances.
Descriptions
Why you should be using TOPRO KW Series Thermal Protectors in your product:
* Miniature size, easy to install.
* Individually temperature calibrated and checked.
* Positive make and break with TOPRO snap action bimetal disc.
* Repeatable temperature performance over life.
* Available in metallic shell and plastic shell.
* Temperature sensitivity for maximum design flexibility.
* Wide selection of leads and imported Mylar insulating sleeves.
* Strict RoHS environmental standard implemented for each component.
* Cadmium free silver-nickel alloy contacts
* Wide selection of trip off temperatures
* Low internal resistance: Below 50 milliohm
* Optional Normally Close type and Normally Open type
* High temperature resistant lead wire, customizable as per customer requirements
Specifications:
* Electric Parameter: AC250V 10A, AC115V 8A, DC 12V 10A
* Contact Life Cycles: No less than 10,000 cycles
* Trip off Temperatures: 50 ~ 150 degrees centigrade. Special specifications are available for customization.
* Temperature Tolerance: +/-5 degrees centigrade
* Reset Temperature: 10 ~ 45 degrees centigrade below the trip off temperatures.
Certifications
All our products of BW9700 series are certified with UL, cUL, VDE, CQC, and RoHS and REACH environmental protection decrees are strictly implemented. Larger and clear reports are available upon request when appropriate.
Please contact us to request for clear copies of the certificates and test reports of the certifications when necessary.
Dimensions
BW-ABS PBT shell: 20.0x8.0x4.2mm
BW-ABJ metal shell: 20.0x7.4x3.8mm
BW-CBS PBT shell: 15.0x7.2x3.8mm
BW-CBJ metal shell: 15.0x6.7x3.2mm
BW-CKS PBT shell: 15.0x7.2x3.8mm
BW-CKJ metal shell: 15.0x6.7x3.2mm
Working Principle
TOPRO BW9700 series thermal protectors adopt bimetal discs that bend when the temperature changes as the temperature sensing element. Without other auxiliary structures, only by the temperature sensing ability of the bimetal disc itself and the electrical heat effect, when the ambient temperature rises to the preset operating temperature, the bimetal disc snaps quickly to break the circuit automatically. When the electrical appliance is cooled down to the reset temperature, the bimetal disc bends back to connect the circuit, thus protecting the electrical appliance from overheat and overload.
Temperature Code
|
Action Temperature (°C) |
Reset Temperature (°C) |
Action Temperature (°C) |
Reset Temperature (°C) |
Action Temperature (°C) |
Reset Temperature (°C) |
||||||
| 50±5 | 30±8 | 90±5 | 60±15 | 130±5 | 90±15 | ||||||
| 55±5 | 35±10 | 95±5 | 65±15 | 135±5 | 95±15 | ||||||
| 60±5 | 40±10 | 100±5 | 65±15 | 140±5 | 100±15 | ||||||
| 65±5 | 45±10 | 105±5 | 70±15 | 145±5 | 105±15 | ||||||
| 70±5 | 45±15 | 110±5 | 75±15 | 150±5 | 110±15 | ||||||
| 75±5 | 50±15 | 115±5 | 75±15 | Special specs are customizable as per customer requirements | |||||||
| 80±5 | 55±15 | 120±5 | 80±15 | ||||||||
| 85±5 | 55±15 | 125±5 | 85±15 | ||||||||
Differential of terms: thermal protector, thermal switch, thermal protection switch, temperature switch, Thermal Cut-out, temperature controller, thermostat
The terms thermal protector, thermal switch, temperature switch, temperature controller and thermostat all refer to a mechanical device that contains a bimetallic strip sensitive to temperature and is therefore used to trigger a snap action when the temperature rises to a preset point. The snap action can cut off or put through power supply to control the protected device.
Thermal protector is the most standard term. As in most cases a thermal protector is used to protect the motor of a machine, such as vacuum cleaner, power tools, mower, washing machine, compressor, the thermal protector is often referred to as a motor thermal protector or a thermal motor protector. As the thermal protector can make or break the circuit like a usual switch, it is also called a thermal switch or temperature switch. Since they are made with the key component, a bimetallic strip, they are also called bimetal thermal switches. A thermostat or temperature controller is used to control the temperature within a certain range. Unlike the motor thermal protector, the thermostat and temperature is often used in a heating device. Literally, thermal protection switches are the same as thermal protectors or thermal switches.
TOPRO 17AM1 Motor Thermal Protectors are the same in quality and structure as 17AM thermal protectors made by Klixon, but much lower in price.
