China KSD Bimetal Thermostat manufacturer
Dongguan Heng Hao Electric Co., Ltd
Bimetallic thermostat, thermal protector, thermal switch manufacturer
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Auto Reset Thermal Fuse Bimetallic Thermostat with Normally Closed or Normally Open Contacts and Small Internal Resistance for Noiseless Operation

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Dongguan Heng Hao Electric Co., Ltd

City: dongguan

Province/State:guangdong

Country/Region:china

Tel:86-13431163393

Contact Person:
Miss.Cherry Lee
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Auto Reset Thermal Fuse Bimetallic Thermostat with Normally Closed or Normally Open Contacts and Small Internal Resistance for Noiseless Operation

Brand Name HENGHAO
Model Number bw-abs
Certification UL TUV CQC
Place of Origin CHINA
Minimum Order Quantity 1000PCS
Price USD 0.1~0.5PCS
Payment Terms T/T
Supply Ability 10000000PCS PER MONTH
Delivery Time 10~15WORKDAYS
Packaging Details 2000PCS /CARTON
Life Cycle 100000 cycles
Voltage & Current 250V 16A
Contact type normally closed or normally open
Switch type auto reset or manual reset
temperature range 0-250℃
Case Bakelite
Detailed Product Description
9700K Thermal Fuse KSD9700 Auto Reset Thermal Fuse BW9700 Bimetallic Thermostat
BW & BH series thermal protectors provide reliable protection against over-current and over-temperature conditions. These devices are firmly sealed, feature small internal resistance, operate silently, and reset automatically. When current flows through the temperature-sensitive bimetallic element, abnormal conditions cause the bimetal to change state, either opening or closing the circuit as required.
BH series protectors offer enhanced safety compared to standard protectors, as they eliminate temperature effect lag during sudden high-current conditions.
BH Series Thermostat Specifications
Electrical Ratings
Electrical RatingDC-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 temperature2/3 of the action temperature with tolerance of ±15°C. Reset temperature can also be provided according to customers' requirement.
Life times10000 times
SizeL15mm W7.1mm H3.8mm
Lead wire#22 3266, end half tripping, length is 70mm, or according to customer's require
UL File noE487478
CQC certificate noCQC16002142880
TUV certificate noB160592241002
BH Series Thermal Protector Dimensions
ModelCaseLength(mm)Width(mm)Height(mm)Voltage & CurrentLead Wire
H20Plastic18.584DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V max 10A#20 3135, end 5mm half tripping, length is 70mm, or according to customer's require
H21Metal18.57.33.8
H21Metal2084AC250V 20A#16 3135
BH-A1DMetal156.63.2DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V#20 3135, #22 3266,#22 3135, end 5mm half tripping, length is 70mm, or according to customer's require
BH-B2DPlastic157.13.8
BH-TB02B-B8DPlastic155.22.4DC-12V max 4A; DC-24V max 3A; AC-125V max 3A; AC-250V max 2A3266-AWG24#, 3135-AWG24# or nickel strip normally, length is 70 mm or according to customer's require
BH Series Thermostat Applications and Instructions
BH series thermal protectors are effective, reliable security protector and alarm devices, widely used in various applications including:
  • 1.5 horsepower motors
  • Lighting devices
  • Inverter welding machines
  • Switch power supplies
  • Rechargeable battery packs
  • Fluorescent lamp ballasts
  • Portable power tools
  • Electric appliances and other electrical equipment
These protectors prevent damage caused by over-current and over-heating resulting from abnormal operating conditions. Enforced types capable of withstanding pressures up to 3.5MPa are suitable for built-in installation in plastic coated motors.
Temperature Codes
CodeTemperatureCodeTemperature
3030℃100100℃
3535℃105105℃
4040℃110110℃
4545℃115115℃
5050℃120120℃
5555℃125125℃
6060℃130130℃
7070℃135135℃
7575℃140140℃
8080℃145145℃
8585℃150150℃
9090℃
BW Series Thermostat / KSD9700 Thermal Protector / BW9700 Temperature Protector
H20, H21 Series Thermostat Principle and Structure
H20 and H21 series universal and enhanced protectors feature large metal casings and are composed of thermal conductive metal casing, bimetallic parts welded with silver alloy contact points, conductive brackets, insulation fixation stands, fixed contact strips, and heat resistance cables.
During abnormal operation, when environmental temperature increases to the set value, the bimetallic components perform quick action, opening the contact points and disconnecting the circuit. When the device cools to safe operating temperature, the contact points automatically close and normal operation resumes.
H20, H21 Series Thermal Protector Specifications
Electrical RatingDC-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 temperature2/3 of the action temperature with tolerance of ±15°C. Reset temperature can also be provided according to customers' requirement.
Life times10000 times
Contact Closure resistance≤50mΩ
Insulation resistance≥100mΩ
Electric strengthAC1500V/1min free from phenomena of break down and flashover
UL File noE487478
CQC certificate noCQC16002142880
TUV certificate noB160592241002
H20, H21 Series Thermal Protector Dimensions
ModelCaseLength(mm)Width(mm)Height(mm)Voltage & CurrentLead Wire
H20Plastic18.584DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V max 10A#20 3135, end 5mm half tripping, length is 70mm, or according to customer's require
H21Metal18.57.33.8
H21Metal2084AC250V 20A#16 3135
BH-A1DMetal156.63.2DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V#20 3135, #22 3266,#22 3135, end 5mm half tripping, length is 70mm, or according to customer's require
BH-B2DPlastic157.13.8
BH-TB02B-B8DPlastic155.22.4DC-12V max 4A; DC-24V max 3A; AC-125V max 3A; AC-250V max 2A3266-AWG24#, 3135-AWG24# or nickel strip normally, length is 70 mm or according to customer's require
H20, H21 Series Temperature Protector Applications
H20 and H21 series protectors are suitable for use in:
  • Chargeable batteries
  • Ballasts
  • Massagers
  • Micro motors
  • Transformers
  • Electric tools
  • Heat electric appliances and instruments
Product certifications: UL, CQC, TUV and RoHS certification approval.
Product Tags: 9700K auto reset thermal fuse   bimetallic thermostat overload protector   KSD9700 thermal fuse switch  
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