Dongguan Heng Hao Electric Co., Ltd
Bimetallic thermostat, thermal protector, thermal switch manufacturer
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2.2KW three phase motor thermal protector
BR series three-phase thermal protector designed for three-phase motor, small volume, good performance, cost-effective, easy installation, can effectively to three-phase motor overheating protection, BR series three-phase thermal protector have BR8A small current BR18A, large current and BR60A large current three kinds of specifications for choice
| BR8A low current | BR18A Mid-current | BR60A High current |
| Rated Voltage: 210V / 380V Size: 19.5x9.3x4.2mm (not include lead wire) | Rated Voltage: 210V / 380V Size: 22x11x5mm (not include lead wire) | Rated Voltage: 210V / 380V Size: 28x13x6.5mm (not include lead wire) |
Open temperature and reset temperature sheet
| Degree | Open temp. | Reset temp. | Degree | Open Temp. | Reset temp. |
| 50℃ | 50+-5℃ | 35+-18℃ | 105℃ | 105+-5℃ | 70+-15℃ |
| 55℃ | 55+-5℃ | 35+-10℃ | 110℃ | 110+-5℃ | 75+-15℃ |
| 60℃ | 60+-5℃ | 40+-10℃ | 115℃ | 115+-5℃ | 75+-15℃ |
| 65℃ | 65+-5℃ | 45+-12℃ | 120℃ | 120+-5℃ | 80+-15℃ |
| 70℃ | 70+-5℃ | 45+-15℃ | 125℃ | 125+-5℃ | 85+-15℃ |
| 75℃ | 75+-5℃ | 50+-15℃ | 130℃ | 130+-5℃ | 90+-15℃ |
| 80℃ | 80+-5℃ | 55+-15℃ | 135℃ | 135+-5℃ | 95+-15℃ |
| 85℃ | 85+-5℃ | 55+-15℃ | 140℃ | 140+-5℃ | 100+-15℃ |
| 90℃ | 90+-5℃ | 60+-15℃ | 145℃ | 145+-5℃ | 105+-15℃ |
| 95℃ | 95+-5℃ | 65+-15℃ | 150℃ | 150+-5℃ | 110+-15℃ |
| 100℃ | 100+-5℃ | 65+-15℃ | 155℃ | 155+-5℃ | 115+-15℃ |
BH series thermostat / Miniature thermal protector / Rechargeable battery thermostat
BH series thermostat’s Principle and structure
BW & BH series that can protect against over-current and over-temperature are sealed firmly, small internal resistance, no noise and reset automatically. When current through bimetal that are sensitive to temperature and current, the status of the bimetal will be changed by over-temperature or over-current to cut off circuit or switch on circuit. BH series are safer than normal protectors, as there is no temperature effect lag under condition of sudden big current.
BH series thermostat’s Specification
Electrical Rating:
| 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’s Dimension
| Model | Case | Length(mm) | width(mm) | High(mm) | Vol.&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’s Application and Instruction
BH series thermal protectors ,effective reliable security protector and alarm devices, are widely used in various types 1.5 horsepower motors, lighting device, inverter welding machine, switch power, rechargeable battery pack, fluorescent lamp ballasts, portable power tools, electric appliances and other electric equipment to prevent from over-current & over-heating caused by abnormal work status. Enforced types that can withstand pressure of 3.5MPa are fit for build-in-installation of plastic coated motor.
| 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℃ |