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Amwei Thermistor Co., Ltd.

 
 
PTC thermistor for over-current overload protection lightning switching and motor start 

  Category : Electronic and electrical->Electronic Parts->PTC Thermistor

     
PTC thermistor for over-current overload protection lightning switching and motor start
 
 
       

  Product Specification
 
  Country  0
  Brand  AMWEI
  Materials  Ceramic material
  Payment Term  TT in advance, or LC

 

    Product Detail
  PTC Thermistor for Overload and Overcurrent Protection.
Ceramic PTC (positive temperature coefficient) thermistors are used instead of conventional fuses to protect load, such as motors, transformers, or electronic circuit, against overcurrent for circuit protection. PTC thermistor protector not only respond to inadmissibly high currents but also if a preset temperature limit is exceeded. PTC thermistor over-current protector limits the power dissipation of the whole circuit by increasing their resistance and thus reducing the current to a harmless residual value. In contrast to conventional fuses, PTC thermistor resettable fuses do not have to be replaced after elimination of the fault but resume their protective function immediately after a short cooling-down time.
Applied in transformers, switches, switch power, adaptor, power charger, battery charger, meter,apparatus, electronic coils, control panels, home electric appliance, automotive electron, air conditioner, etc.
Resistance at 25C (R25) :0.5-5000 ohm
Maximum Operating Voltage(Vmax):12-650 V
Non-trip Current(Int): 5-7000mA
Diameter: 3-22mm

PTC Thermistor for Overcurrent Protection in Telecom Equipment
PTC thermistors help provide protection against power cross, power induction surges and lighting surge defined in ITU, Telcordia, UL. Available in chip, radial-leaded coated and non-coated, SMD, twin vertical surface mount configuration. PTC thermistor overcurrent protector provides reversible, self-resetting protection against over-currents of telecommunication line protector units, improve the reliability of custom premises and network equipment.
Ceramic PTC thermistors can be found providing re-settable line protection at the exchange, monitoring hot spots and protecting ringers, battery feeds, transformers and relay circuits. Also used extensively to protect the mobile phone's battery pack against overcharging in land-based and radio mobile communications.
Resistance at 25C (R25): 8-220 ohm
Maximum Operating Voltage(Vmax):110-650 V
Non-trip Current(Int): 40-180mA

PTC Thermistor for Switching, Time Delay of Lighting.
Specifically designed for time delay of fluorescent lamp, electronic ballast and electronic energy saving lamp, which will extend the service life of the fluorescent tube by over 4 times.
Resistance 25C (R25) : 50-5000 ohm
Maximum Voltage Withstanding: 420-1000 V
Switch Temperature: 60-120C

PTC Thermistor for Motor Starting (Motor-starter)
PTCR Motor start packages can be economical solid state torque assist for heat pumps, room air, commercial and residential air conditioning and refrigeration systems. PTC thermistors can be used to protect the auxiliary starter winding of induction motors or single phase motors. Compared to the alternative start capacitor and relay, PTCR Motor start devices save several wires, occupy less panel space, mount more easily, and cost less.
Resistance at 25C (R25): 5-100 ohm
Max. Current: 2.5-15 A
Max. Voltage:180-500V

PTC Thermistor for Degaussing Circuit (Degausser)
Form: 2 pins, 3 pins with PTC heater, silicon resin coated lead wire form.
Resistance at 25C: 1.5 ohm--36 ohm
Max. voltage: 140V, 270V

   


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