Thermal Protector, BR-A1D Series
BR-A1D series thermal protector shares the same property and internal structure with BR-B2D series. The only and biggest difference between the 2 products is that BR-B2D is designed with insulated plastic casing and BR-A1D employs casing made from stainless steel (used in conjunction with insulating sleeve).
The primary application of this overcurrent protection device is to protect single-phase AC motor (50Hz, 220V) from overload, stalling, or other abnormal conditions. Basing on the bimetal’s temperature sensing and the current thermal effect, the state of the bimetal component changes rapidly, leading to the automatic separation of the contacts and thus an open circuit. BR-A1D thermostat features small volume and high sensitivity. It can bear 30MPa of pressure with its reinforced enclosure.
Protector drawings:
- Enforced metal case with minimum 0.5mm wall thickness for impregnation process
- Standard metal case
Features
1. The reinforced stainless steel enclosure allows the thermal protector to be able to bear 30MPa of pressure. Its wall thickness is no less than 0.5mm. For application in plastic motor, the protector should be mounted inner the motor
2. The max capacity of contacts: AC250V/8A (6000 times of service); AC125V/12A (6000 times of service)
3. Opening temperature: 50-150℃, in increment of 5℃; tolerance of opening temperature: ±5℃
4. Standard wires: UL3135 #20, red, 70mm; wire length and length of stripping is customizable
5. Contact resistance: 50 mΩ (under room temperature)
| Model | Opening temperature | Closing temperature | Model | Opening temperature | Closing temperature |
| BR-A1D 50℃ | 50±5℃ | 35±10℃ | BR-A1D 105℃ | 105±5℃ | 70±15℃ |
| BR-A1D 55℃ | 55±5℃ | 35±10℃ | BR-A1D 110℃ | 110±5℃ | 75±15℃ |
| BR-A1D 60℃ | 60±5℃ | 40±10℃ | BR-A1D 115℃ | 115±5℃ | 75±15℃ |
| BR-A1D 65℃ | 65±5℃ | 45±12℃ | BR-A1D 120℃ | 120±5℃ | 80±15℃ |
| BR-A1D 70℃ | 70±5℃ | 45±15℃ | BR-A1D 125℃ | 125±5℃ | 85±15℃ |
| BR-A1D 75℃ | 75±5℃ | 50±15℃ | BR-A1D 130℃ | 130±5℃ | 85±15℃ |
| BR-A1D 80℃ | 80±5℃ | 55±15℃ | BR-A1D 135℃ | 130±5℃ | 85±15℃ |
| BR-A1D 85℃ | 85±5℃ | 55±15℃ | BR-A1D 140℃ | 130±5℃ | 85±15℃ |
| BR-A1D 90℃ | 90±5℃ | 60±15℃ | BR-A1D 145℃ | 130±5℃ | 85±15℃ |
| BR-A1D 95℃ | 95±5℃ | 65±15℃ | BR-A1D 150℃ | 130±5℃ | 85±15℃ |
| BR-A1D 100℃ | 100±5℃ | 65±15℃ |
