Overload protection PTC thermistors
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In Category: Electronic Components & Supplies > Electronic Products & Components Processing
Main Products: PTC Thermistor, NTC Thermistor, Thermal resistor, Temperature Sensor
MZ 31 series of PTC thermistor is a million- time safety device of automatic protection,recoverability, using repeatedly, and no trigger, noise or protective components that could protect and restore from abnormal temperature and current automatically,which called "auto restore fuse" and "ten-thousand-time fuse".Recoverability, using repeatedly, and no trigger, noise or sparks.
PTC of PR2 series is a million- time safety device of automatic protection, recoverability, using repeatedly, and no trigger ,noise or sparks.-------When PTC is in the normal state, the resistance is too low to affect the regular work of the protected circuit such as the voltage transformer’s primary and secondary loops.------When the circuit is in disorder, the PTC will generate heat suddenly, and the resistance value will go up to the high state,. which can make the circuit in the state of relatively “breaking up” to protect the circuit.
the current through PTC is lower than the rated current and PTC is in the normal state with small resistance value,which will not affect the normal operation of the protected circuit such as primary and secondary loops of the voltage transformer.In case of some trouble in the circuit and the current is bigger than the rated current,the PTC will become hot quickly and present high resistor value, which sets the circuit relatively “off” to protect the circuit from damage.After the trouble is removed,PTC will automatically restore its low resistance state and the circuit will resume normal operation.
In selecting PTC thermistor as overload protection component,firstly,make sure of the maximum operating current in the circuit(non-trip current of PTC thermistor) and maximum operating voltage,rated zero power resistance,and also the outlook and dimension should be also taken into consideration.
PTC thermistor Sensor Protection temperature range: 60～130℃- quick action time- good stability- small size and convenient installment- no setting again after over-heat protection- applied in: transformers, power parts, and all types of electricity machinery that work continuously, such as: switching power ...
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Starting-circuit with PTC Thermistor has more advantages than the previous heavy-hammer starting-circuit.-. No trigger or noise, free Switching, and Long Operating Life-. It can control the current without other controller. The small size can be connected directly to compressors for use-. Support most of ...
High reliability, good performance of safety and stability, and Used in the frequent-switching. The withstanding voltage can reach to over 600-1000VAC.Switching current can pass over 100,000 times: the resistance will not float.Applied in: energy-saving lamps, fluorescent electronic ballasts, and digital ...
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NTC thermistor is a negative temperature coefficient thermistor. It is to use a single high-purity material, with close to theoretical density structure of high-performance ceramics. Thus, in the realization of miniaturization, it is also a resistance value, temperature characteristics of fluctuation is ...