Auto Reset Thermal Fuse with 50-150℃ Temperature Range 10000 Life Cycle and Large Metal Casing
The H20 and H21 series universal and enhanced protectors feature large metal casings composed of thermal conductive metal casing, bimetallic parts welded with silver alloy contact points, conductive bracket, insulation fixation stand, fixed contact strip, and heat resistance cable. In case of abnormal operation, when the environment temperature increases to the set value, the bimetallic parts perform quick action to open the contact point and disconnect the circuit. When cooled to safe operating temperature, the contact point automatically closes to restore normal operation.
| 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. Custom reset temperatures available upon request. |
| Life Times | 10,000 cycles |
| 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
| 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 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 70mm (customizable) |
| 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, length 70mm (customizable) |
The H20/H21 series is suitable for:
- Chargeable batteries
- Ballasts
- Massagers
- Micro motors
- Transformers
- Electric tools
- Heat electric appliances
- Instruments
Temperature sensing components consist of bimetallic strip. When temperature reaches the action range, it quickly jumps to disconnect. When temperature declines to a fixed point, the contact point cannot reset until the circuit is reconnected by pushing the reset button.
- Manual reset thermostats can reset when temperature declines 20°C after snap action by pressing the reset button (4-6N force recommended).
- For normal function, maintain at least 20.4mm distance between reset button and close cover.
The product has UL, CQC, TUV and RoHS certification approval.
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