Bimetallic Motor Thermal Overload Switch , Electric Motor Thermal Protection Sensors
Price:
0.19 / pieces
MOQ:
1000PCS
Delivery Time:
7 days
Brand:
HENGHAO
Product Description
Bimetallic Motor Thermal Overload Switch
Electric Motor Thermal Protection Sensors
BW9700 Series Bimetallic Thermal Sensors and Protectors for Motors
Operating Principle and Structure
The BW series thermal protector utilizes a specifically engineered bimetallic strip that requires no auxiliary mechanisms. The bimetallic element directly senses heating current and rapidly changes state to automatically open or close electrical contacts, providing reliable overheat and overload protection.
Applications
Widely used in electric motors and electrical equipment including:
- Electric blanket and hot wall systems
- Washer motors and soybean milk machine motors
- Fan motors and air conditioning motors
- Fractional motors and DC motors
- AC brushless motors and water pumps
- Transformers and rectifiers
- Lighting systems and rechargeable batteries
- Various electric heating appliances
Technical Specifications
- Contact Type: Normally closed and Normally open
- Electrical Rating: 10A/AC120V; 8A/AC250V; 10A/AC250V; 16A/AC250V
- Circuit Resistance: ≤50mΩ (Initial value)
- Insulation Resistance: ≥100mΩ
- Action Temperature Range: 40~150℃
- Case Options: Metal case and plastic case
- Life Expectancy: ≥10,000 cycles
Dimensions and Models
| Model | L(mm) | W(mm) | H(mm) | Electrical Rating | Lead Wire (mm) |
|---|---|---|---|---|---|
| BW metal | 20 | 7.5 | 3.8 | 5A/250V;10A/250V | AWG#22,AWG#18 high temperature silicone wire L1=L2=70mm, or custom requirements |
| BW metal | 20 | 8.0 | 4.1 | 16A/250V | AWG#22,AWG#18 high temperature silicone wire L1=L2=70mm, or custom requirements |
| BW plastic | 20 | 8.0 | 4.0 | 5A/250V;10A/250V | AWG#22,AWG#18 high temperature silicone wire L1=L2=70mm, or custom requirements |
Temperature Specifications
| Code | Open Temp. | Reset Temp. | Code | Open Temp. | Reset Temp. |
|---|---|---|---|---|---|
| 40 | 40℃±5℃ | ≥30℃ | 100 | 100℃±5℃ | 70±10℃ |
| 45 | 45℃±5℃ | ≥30℃ | 105 | 105℃±5℃ | 70±12℃ |
| 50 | 50℃±5℃ | ≥30℃ | 110 | 110℃±5℃ | 75±12℃ |
| 55 | 55℃±5℃ | ≥30℃ | 115 | 115℃±5℃ | 80±12℃ |
| 60 | 60℃±5℃ | 40±10℃ | 120 | 120℃±5℃ | 85±12℃ |
| 65 | 65℃±5℃ | 45±10℃ | 125 | 125℃±5℃ | 90±12℃ |
| 70 | 70℃±5℃ | 50±10℃ | 130 | 130℃±5℃ | 95±12℃ |
| 75 | 75℃±5℃ | 55±10℃ | 135 | 135℃±5℃ | 100±12℃ |
| 80 | 80℃±5℃ | 60±10℃ | 140 | 140℃±5℃ | 105±12℃ |
| 85 | 85℃±5℃ | 65±10℃ | 145 | 145℃±5℃ | 110±12℃ |
| 90 | 90℃±5℃ | 70±10℃ | 150 | 150℃±5℃ | 115±12℃ |
| 95 | 95℃±5℃ | 75±10℃ |
Competitive Advantages
- Compact size for easy installation
- Fast-acting bimetallic strip with quick response
- Extended life expectancy exceeding 10,000 cycles
- Prevents vacuum impregnation process leaks
- Direct replacement for SENSATA 17AM, 7AM and SEKI ST-22 models
Technical Drawings
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Dongguan Heng Hao Electric Co., Ltd
Location
No.9, five lane, Shangchegang, Shangtang road, Gekeng, Hengli Town, Dongguan City, Guangdong, China
Contact Person
Cherry Lee