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2BM Bimetal Thermal Overload Protector

2BM bimetal thermal overload protector has a very fast tripping action to prevent the motor temperature from being too high and a manual reset protector for automatic circuit disconnection when the motor overloads for a long time.

Product Details:

2BM bimetal thermal overload protector has a very fast tripping action to prevent the motor temperature from being too high and a manual reset protector for automatic circuit disconnection when the motor overloads for a long time, the rotor is blocked, the voltage is too low, the temperature is too high and the air is not ventilated, It is mainly used in air motor, motor pump, commercial and industrial machinery motor, food waste disposer , fuel oil motor, power tool, vacuum cleaner, etc.


Special Features

* Fully enclosed, compact size, long life span;

* High reliability and fast trip off;
* Manual reset with dual control of current and temperature;
* Very fast trip time to prevent motor temperatures from being too high;
* Specific specifications and wires can be flexibly customized according to customers’ specific requirements.

Technical Specification

Rated Voltage 125/250V AC
Control Current Range 3A~50A
Short Circuit Current 1000A
Hi-pot Test 1500V AC/Min
Temperature Range 90℃~150℃±5℃
Trip off Time 4~9 seconds or as required


* Garbage Process

* Food Waste Disposer

* Air Motor

* Motor Pump

* Commercial and Industrial Machinery Motors

* Fuel Stove Motor

* Power Tool

* Vacuum Cleaner

Dimensional Drawing

2BM Bimetal Thermal Overload Protector

2BM Bimetal Thermal Overload Protector


Contact Information

Company Name: Yangzhou Wuyue Electric Co.,Ltd

Address:Building D, Software Information Industrial Park, No.2 Huaijiang Avenue, Baoying County, Jiangsu Province, China

Contact: Lorena Qiao

Mobile: +86 153 6641 6606 / 189 2191 2633

Tel: +86 514 88986588

Fax:+86 514 8898 6599





1. What’s the shipping term of bimetal thermal switch?

A: Since all our bimetal thermal switches have small size, the shipping term should be based on the order quantity. If the order is above 50,000 pcs per shipment, the most economical shipping term is by sea. If the order quantity of thermal switch is less than 10,000 pcs per shipment, shipping by express would be the only choice because the weight of 10,000 pcs would be less than 50Kg, MOQ of shipping by air. For the quantity between 10,000 and 50,000 pcs, express or shipping by air is optional, depending on the weight of different thermal switches.

2. What’s the price difference between delivery term Ex works and FOB?

A: The cost difference between delivery term Ex Works and FOB for our thermal switch is around USD 270 per shipment. Therefore, if we quote the price under Ex works, and you want us to offer FOB price, we will add USD 180 to each shipment.

3. What’s the advantage of using automatic equipment to produce thermal switches?

Comparing to traditional manual equipment, automatic equipment is more precision, consistent, reliable, faster, and safer in producing thermal switch. When conducting temperature calibration, the auto equipment can control the strength and movement of calibration pin precisely, and avoid operator’s occasional mistakes. During the process of bimetal temperature selection and temperature testing, it is much faster and can save 90% human power. For bimetal and contacts welding processes, the automatic equipment is obviously more reliable.

Because of the above reasons, we are using automatic equipment to produce most of our thermal switch and thermal protectors. Of course, it also has some short comings. It would be difficult for auto facilities to produce customized and small orders. To solve this problem, we remain a complete set of manual operation equipment. It is intended for trial orders or customized products.

4. What would happen if the working current exceeds the rated value of a thermal switch?

When the end users operate the appliances, the working current might exceed the rated value. If so, what would happen to the bimetallic thermal switch? There are some possible results:

a. The thermal switch would trip off earlier than the rated temperature. The reason is that the bigger current would generate more heat, and the bimetal would sense higher temperature than the rated value. So, it would trip off earlier.

b. The life endurance would be shorter. Bigger current would hurt both bimetal and contacts. There would be flashover between two contacts. If the current is too big, for example, 3 or 4 times of rated value, the two contacts would be stuck and could not open. That would make thermal switch malfunction, or even cause fire.

c. The thermal switch failed to action in few seconds and even burned the insulation sleeving

Therefore, it is very important for the user to operate the thermal switch correctly and try to avoid overloading the thermal switch.