16A 20A thermal protector H21 metal case temperature switch large current thermostat BW9700

1. H20,H21 series thermostat’s Principle and structure

H20,H21serial universal and enhanced protectors with large metal casing are composed of the thermal conductive metal casing, bimetallic parts welded with silver alloy contact point, conductive bracket, insulation fixation stand, fixed contact strip and heat resistance cable. In case of abnormal operation, along with the increase of the environment temperature to the set value, the bimetallic parts perform quick action, open the contact point, and disconnect the circuit. When the device is cooled to the temperature for safe operation, the contact point will automatically closes and recover normal operation.

2. H20,H21series thermal protector’s Specification

   1. Electrical Rating	DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V max 16A
      Open temperature	(30~150)±5°C; 5°C a step
      Reset temperature	2/3 of the action temperature with tolerance of ±15°C. Reset temperature can also be provided according to customers' requirement.
      Life times	10000 times
      Contact Closure resistance:	≤50mΩ
      Insulation resistance:	≥100mΩ
      Electric strength:	AC1500V/1min free from phenomena of break down and flashover.
      UL File no	E487478
      CQC certificate no	CQC16002142880
      TUV certificate no	B160592241002

3. H20,H21series thermal protector’s Dimension

4. H20,H21series temperature protector’s Application

H20,H21series is applicable to chargeable battery, ballast, massager, micro motor, transformer, electric tools, heat electric appliance and instrument etc.

The product UL,CQC,TUV and RoHS certification approval.

Dong Heng Hao Electric Co., Ltd is located in Dongguan City, Guangdong Province with very convenient transportation and favorable Geographic location.

We are specialized in developing and producing temperature controllers, thermostat, thermal protectors , temperature switch, temperature protector bimetal thermostat and other related products, our company has more than 10 senior technicians who are very familiar with this industry. Our product have been certified by CQC,TUV,UL CUL and ROHS environmental certification. Our company is always adhering to ISO 9001:2000 Quality Management System and the product quality is automatically inspected and controlled by the computer. Our annual output can reach 50,000,000 pieces and our products are widely exported to Europe, America and South Asia.