3MPE 6APE Snap Action Both Temperature And Current Protector
Bimetal Thermal Protector
Technical Parameters
1. Operating temperature range:50~180℃;
2. The tolerance: ±5℃;±7℃ and ±10℃ optional;
3. Trip Off current: 1~40A;
4. Trip off time: 4~10s( or customized)
5. The product portfolio should be able to withstand the 3.0Kg
pulling force without loose; terminal and riveting line portions
have to withstand 3.0Kg pull force with loose.
Construction
1. Appearance: The overall size conforms to the specifications and
drawings.
2. Connection Type:Snap connector or riveting wire.
3. Case: Plated Ni and Zn on the mid steel material surface.
4. Sleeving material:Polyester insulation material
Special Features
1. Both temperature and current sensitive;
2. Small size, long life and high reliability;
3. High level bimetal ensures that it can withstand the current of
normal circuit;
4. The combination of bimetal and heater can action snappily;
5. Increase the PTC heating element of thermal protector, so it has
the characteristics of single shot trip, with self holding and time
-delay
protection;
6. Terminals are in same direction or opposite direction optional,
or customized;
7. Each parts are strict implementation of the European ROHS and
REACH environmental standards.
Scope of Application
●Vacuum cleaners, grinders, mixers, lawn mowers
●Electric tools, snow blowers
●Washing machines, household appliances, heating elements, hand
dryers
Electrical Specifications
| ●45A/ 12V DC |
| ●20A/ 24V DC |
| ●18A/ 250V AC |
| ●28A/ 125V AC |
| ●R/T25℃ Electricity test standard: 4-10S . |
Temperature Range and Tolerance
| Operating temperature |
| 50~180°C |
| Operating temperature tolerance |
| +5°C, +7°C |
The Design and Working Principle of Thermal Protector
1. Both temperature and current sensitive function:
1.1 Current overload protection principle:
The current flows the case terminal, bimetal strip or auxiliary
heating wire(which is connected with stationary contact of the
bottom board), then the bottom board terminals is connecting to
application(such as motor and transformer etc.) in circuit, when
the application causes the over-current or locked-rotor current to
exceed the prescribed value, the thermal protector cut the power
off within the set time, so that the application are protected.
1.2 Temperature protection principle:
The current flows the case terminal and bimetal strip, then the
bottom board terminals is connecting to application(such as motor
and
transformer etc.) in circuit, when the application works
abnormally, which causes the ambient temperature to exceed the
setting value, the thermal protector cut the power off ,when the
ambient temperature will decrease and then the protector will close
again.
2. Power cutting and time delay protection
Added the PTC heating element
2.1 Work-operating
The protector is connected to PTC in parallel, then connected to
application in series.When the application is working normally, the
current will flow through protector.PTC will not work.
2.2 Time delay protection
•When the application works abnormally, which causes the ambient
temperature to exceed the prescribed value, the protector will
open. Then, the current flows through PTC. Since PTC has a very
high resistance, the current assigned to the application will be
too flow to start it.Meanwhile, the heat generated by PTC will
remain the protector open until the power is unplugged.
•After the power is unplugged, the ambient temperature will
decrease and then, the protector will close again.
