Auto Reset Thermal Fuse Bimetallic Thermostat with Normally Closed or Normally Open Contacts and Small Internal Resistance for Noiseless Operation
Price:
USD 0.1~0.5PCS
MOQ:
1000PCS
Delivery Time:
10~15WORKDAYS
Brand:
HENGHAO
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 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 |
| Size | L15mm W7.1mm H3.8mm |
| Lead wire | #22 3266, end half tripping, length is 70mm, or according to customer's require |
| UL File no | E487478 |
| CQC certificate no | CQC16002142880 |
| TUV certificate no | B160592241002 |
BH Series Thermal Protector Dimensions
| Model | Case | Length(mm) | Width(mm) | Height(mm) | Voltage & Current | Lead Wire |
|---|---|---|---|---|---|---|
| H20 | Plastic | 18.5 | 8 | 4 | DC-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 |
| H21 | Metal | 18.5 | 7.3 | 3.8 | ||
| H21 | Metal | 20 | 8 | 4 | AC250V 20A | #16 3135 |
| BH-A1D | Metal | 15 | 6.6 | 3.2 | DC-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-B2D | Plastic | 15 | 7.1 | 3.8 | ||
| BH-TB02B-B8D | Plastic | 15 | 5.2 | 2.4 | DC-12V max 4A; DC-24V max 3A; AC-125V max 3A; AC-250V max 2A | 3266-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
| Code | Temperature | Code | Temperature |
|---|---|---|---|
| 30 | 30℃ | 100 | 100℃ |
| 35 | 35℃ | 105 | 105℃ |
| 40 | 40℃ | 110 | 110℃ |
| 45 | 45℃ | 115 | 115℃ |
| 50 | 50℃ | 120 | 120℃ |
| 55 | 55℃ | 125 | 125℃ |
| 60 | 60℃ | 130 | 130℃ |
| 70 | 70℃ | 135 | 135℃ |
| 75 | 75℃ | 140 | 140℃ |
| 80 | 80℃ | 145 | 145℃ |
| 85 | 85℃ | 150 | 150℃ |
| 90 | 90℃ |
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 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 |
H20, H21 Series Thermal Protector Dimensions
| Model | Case | Length(mm) | Width(mm) | Height(mm) | Voltage & Current | Lead Wire |
|---|---|---|---|---|---|---|
| H20 | Plastic | 18.5 | 8 | 4 | DC-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 |
| H21 | Metal | 18.5 | 7.3 | 3.8 | ||
| H21 | Metal | 20 | 8 | 4 | AC250V 20A | #16 3135 |
| BH-A1D | Metal | 15 | 6.6 | 3.2 | DC-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-B2D | Plastic | 15 | 7.1 | 3.8 | ||
| BH-TB02B-B8D | Plastic | 15 | 5.2 | 2.4 | DC-12V max 4A; DC-24V max 3A; AC-125V max 3A; AC-250V max 2A | 3266-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.
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Company
Dongguan Heng Hao Electric Co., Ltd
Location
No.9, five lane, Shangchegang, Shangtang road, Gekeng, Hengli Town, Dongguan City, Guangdong, China
Contact Person
Cherry Lee