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Changzhou Ainuo Electronic Technology Co., Ltd.
TEL:0519-85975897 69880288 69880588
Q Q:381031500
ADD:No. 80-2, Zhenxing Road, Anjia, Chunjiang Town, Xinbei District, Changzhou City
3MP motor protector


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products Details

Product reviews
Flexible installation
 provide locked-rotor state of maximum protection
 low-cost transformer protection solutions
The main advantage
As a leading manufacturer in the temperature control industry, Ainuo Technology has developed 3MP for 120V AC and 250V AC, which can operate over a wider range of temperatures and currents than existing protection solutions. The product has stable working characteristics and good reliability, and the insulating sleeve is sealed with two ports, which can meet the motor immersion process.
Range of application
It is widely used in transformers, washing machines, dishwashers, clothes dryers, vacuum cleaners and motors for various industrial applications with operating voltages of 120 and 250V AC.
Design principle
The 3MP metal shell and terminal are formed in one piece, which can accommodate the pre-calibrated Aino jump bimetal disc bottom plate. For the s-shaped or helical resistance heating elements with different resistance values of the motor current, the sensitivity to current can be increased. Advanced contact system with one contact on the bimetal disc and one on the bottom plate, working together with the disc to ensure longer service life and higher reliability. The connection terminal configuration can be customized according to user requirements. Aino Technology offers a range of standard wire configurations that users can customize on demand. Type code and sleeve color Lead color can be selected and customized according to user needs.
3MP works simply and efficiently. The current passing through the protector and the temperature condition of the surrounding parts enable the protector to operate. The circuit is disconnected when the disc reaches a preset temperature or the current reaches a set value. When the device temperature drops to a safe value, the contact automatically resets. Bimetallic discs provide excellent thermal and current sensitivity under overload conditions. The combination of resistance wires and bimetal discs provides extremely accurate trip time for maximum protection in case of stalling. The 3MP feature allows motor protectors to be mounted outside the windings, providing greater manufacturing flexibility for motor manufacturers. As a thermal circuit breaker with superior current sensitivity, 3MP is an advanced low cost transformer protection scheme.
Safety certification
UL&CUL: E258861 (UL2111 standard)
CQC: 16002141391 (GB14536.3-2008 standard; Gb14536.1-2008 standard) motor thermal protector
TUV: 50380206 (EN60730-1, EN60730-2-9)
CB: CN36751 (IEC60730-2-2)
Technical characteristics
Service temperature range: 40~180℃, can be provided according to customer requirements within the range of any temperature;
Temperature tolerance: ±3℃, ±5℃, ±8℃, three kinds of tolerance for customers to choose, generally ±5℃, or customized according to customer requirements.

External structural dimension



Characteristic curve

These curves are used only to provide guidance when selecting protectors for a particular application. Other factors should be considered when selecting a protector, such as the distance from the heat source and the method of installation. Final trip time depends on terminal configuration and installation conditions.

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No. 80-2, Zhenxing Road, Anjia, Chunjiang Town, Xinbei District, Changzhou City
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