Consultation：Cherry Lee Add：Shangchegang Industrial,Hengli Twon, Dongguan City,Guangdong Province, China
BH-B2D Plastic case thermal protector
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 / Miniature thermal protector / Rechargeable battery thermostat
1. 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.
2. BH series thermostat’s Specification
2.1. Electrical Rating:
a. DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V max 16A for BH series
b. DC-12V max 4A; DC-24V max 3A; AC-125V max 3A; AC-250V max 2A for BH-TB02 series
2.2. Open temperature: (30~150)±5°C; 5°C a step.
2.3. Reset temperature: 2/3 of the action temperature with tolerance of ±15°C. Reset temperature can also be provided according to customers' requirement.
2.4. Dimension
| Model | Length (mm) | Width(mm) | High(mm) | Lead wire |
| BH-TB02B-B8D | 13.5 | 5.4 | 2.4 | 3266-AWG24#, 3135-AWG24# or nickel strip normally, length is 70 mm or according to customer’s require |
| BH-A1D | 15 | 6.6 | 3.2 | |
| BH-B2D | 15 | 7.3 | 3.9 | |
| BH-B3D | 18 | 8 | 4 |
| 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 |
3. 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℃ |
BH-B2D thermal protector's A-C drawing
BH-B2D thermal protector have got the UL CUL CQC TUV and ROHS certificate
UL:E487478
TUV:B160592241002 Rev.01
CQC16002142880
CQC16002142881
