Description:
PTC Thermistor features:1) Utilizing the characteristic of PTC material
2) Small size
3) High voltage resistance
MZ12 ptcthermistor heaters
MZ12Athermistor is mainly applied in abnormal current and thermalprotection of electronic ballast(energy-saving lamp, electronictransformer, multimeter, intellectualized ammeter etc.).It can bein series of the load circuitry right and clamp the excessivecurrent or interdict the current automatically in exceptionalconditions, and come back the primary state automatically after thetrouble eliminat:
·No-touch-point circuit and elements protection
·Clamping the excessivecurrent automatically
·Coming back auto.aftertrouble eliminating
·No noise or sparkle inoperating
·Security working, operatingeasliy
Principal:
MZ12Athermistor in series of the power supply loop, the current passingthrough PTC will be less than the ratedcurnt, PTC will be normal,its resistance will be very litle and the normal work of protectedcircuitries of electronic ballast(energy-saving lamp, transformer,multimeter etc.)will not be influenced when circuitry is in normalstate.And PTC will heat suddenly, its resistance will rise up tothe high-resistance state suddenly accordingly so as to clamp orinterdict the current auto matically to protect the circuitry fromdamage when the current is far over the rated value.After thecurrent come back the normal state, PTC will also come backlow-resistance state automatically and the circuitry will worknormally again.
In the field of Surge current protection of electronicballast(energy-saving lamp, transformer, multimeter etc.).NanjingShiheng has taken the lead in making out MZ12A product of whichhigh voltage resistance is thefeature.
Specification:
Product series:MZ12Aover l/t protection of PTC thermistor series
Sorts of switch temp:75-75°C 105-105°C120-120°C
Chip diameter:S-Φ3 A-Φ5 B-Φ7 LB-Φ8 M-Φ10 SL-Φ13LL-Φ19
Rated R:82R-82Ω 4R7-4.7Ω 151-150Ω
R.precision:N-±30% M-±20% k-±10% J-±5%
Max.non-operating current:060-60mA 300-300mA
PTC, which is used as over currentprotection, is ought to selected to fit for the Max, non-operatingcurrent and Maximum voltage.Formal Dimension of elements, Rated zero powerresistance and the range of application temperature should be alsoconsidered.Usually, 1.2-1.5 times of the maximum working current isselected as the Max.Ptc non-operating current when the circuitworks normally.The voltage befell on PTC in normal or abnormalstates of the circuitry shouldn''t Non-operating Current exceed theMaximum working voltage
