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DC Motor Protector SN-25


The SN-25 Series is a high current DC motor protector which delivers the benefit of locked rotor and overload protection in a robust integrated package. A broad range of design and mounting options enable this device to be custom engineered to meet your needs.


dc motor protector sn-25

Applications
- Over current and temperature protection in DC Motors.
- Refrigerator Compressors
- DC blowers
- Engine Cooling fan motors
- Pump Motor

Features
- Tin plated steel base and tab.
- Available in covered and uncovered versions
- Designed to trip time or temperature specifications.
- Multiple bimetallic resistivities available.

Specifications
Nominal Operating Voltage 12-48 Volts DC
Typical voltage drop at operating current 200 mV max
Cut-off temperature range 60ºC to 166ºC
Operating Trip Current Range 10-125 Amps

The SN-25 Series has been designed to offer protection for a wide range of 12 volt to 48 volt applications in a minimum package size. The SN-25 Series is suitable for both intermittent and continuous rated motors. The SN-25 is also designed for manual switching operations. The SN-25 is physically small and has unique 'snap action' bimetal disc, ensuring a positive make and break switching action for enhanced contact life.

Selection Code Chart
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Line Diagram
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Sectional view
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Graph
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The Current VS Trip Time graph shows that whenever there is a locked rotor condition and the current exceeds 2.5 times the rated current the circuit is opened by SN-25 within 4-7sec without harming the motor.




  • Special Purpose Switches
  • Heaters
  • And more..


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