Thermal Fuse Auto Reset Thermal Fuse Thermal Switch Temperature Switch
BW & BH series protectors offer reliable over-current and over-temperature protection with firm sealing, small internal resistance, no noise, and automatic reset functionality. The bimetal components respond to temperature and current changes, altering their state to either cut off or complete the circuit as needed.
BH Series Thermostat Specifications
| Specification |
Details |
| 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 (customizable) |
| Life times |
10000 times |
| Size |
L15mm W7.1mm H3.8mm |
| Lead wire |
#22 3266, end half tripping, length is 70mm (customizable) |
| Certifications |
UL File no: E487478
CQC certificate no: CQC16002142880
TUV certificate no: B160592241002 |
KSD9700 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 (customizable) |
| 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 (customizable) |
BW-ABJ Thermal Fuse Specifications
These temperature controllers serve as effective, reliable security protectors and alarm devices, widely used in 1.5 horsepower motors, inverter welding machines, switch power supplies, fluorescent lamp ballasts, and other electrical equipment to prevent damage from abnormal operating conditions.
| 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 Features
1. Principle and Structure
BW series protectors feature large metal casings containing thermal conductive components, bimetallic parts with silver alloy contact points, conductive brackets, insulation stands, fixed contact strips, and heat-resistant cables. When temperature reaches the set value, the bimetallic components quickly open the circuit, automatically resetting when cooled to safe operating temperatures.
2. Specifications
- Switch type: Normally closed or normally opened
- Operating Voltage/Current: AC250V/5A; AC125V/8A
- Operating Temperature: 40~150℃ (5°C increments)
- Tolerance: ±3°C/±5°C/±7°C
- Reset temperature: 15-45°C below operating temperature
- Contact resistance: ≤50mΩ
- Insulation resistance: ≥100mΩ
- Electric strength: AC1500V/1min (no breakdown or flashover)
- Service life: 10000 cycles
3. Dimensions
| Model |
Length (mm) |
Width (mm) |
Height (mm) |
| BW9700 |
20 |
7.3 |
3.8 |
4. Applications
BW series protectors are suitable for rechargeable batteries, ballasts, massagers, motors, transformers, electric tools, heating appliances, and instruments.
Certifications: UL, CQC, VDE, and RoHS compliant
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