ptc thermistor for time delay start of lighting and ballast mz11 series-在线欧洲杯买球

ptc thermistor brief introduction:

ptc thermistor for time delay start of lighting and ballast,which are applicable to various types of fluorescent lamp,electronic ballast,

electronic energy-saving lamp and digital multi-meters.it can change hard start of the ballast and electronic energy-saving lamp 

to pre-heated start and preheating time of the filament can come up to 0.4-2.0 seconds,which can greatly prolong service life of 

the fluorescent tube by over 4 times.

product application of ptc thermistor :

1. various types of fluorescent lamp,

2. electronic ballast,

3. electronic energy-saving lamp.

working principle of ptc thermistor:

when the high frequency shaking circuit loop is switched on, because ptc thermistor is in normal temperature state and rt is in a low state, 

its resistance value is far lower than c2 resistance, the light pressure is also smaller than that of starting it. then the current through c1, 

rt forms a return circuit to preheat the filament. meanwhile, ptc thermistor is heated to above the curie temperature, 

rt heating temperature exceeding the switch temperature tsw. after around 0.4-2 seconds,rt skips into high resistance state of far higher than 

c2 resistance.and the current goes through c1, c2 forming a return circuit and causing lc resonance and producing high voltage to light the 

fluorescent tube.

selection guide:

for a certain electronic ballast, energy-saving light, higher ptc thermistor resistance, smaller ptc ceramic body dimension, lower curie 

temperature, will lead to its lower power consumption, shorter preheating time, conversely, larger power consumption, longer preheating time.

generally speaking,we should select the ptc thermistor with lower resistance, higher  curie temperature(tc point) and bigger ceramic body 

dimension relatively to delay the preheating time.

advantages:

1. used in the frequent-switching,typical switching life can pass over 100,000 times;

2. high reliability, good performance of safety and stability;

3. wide operating temperature range;

    -25 ~ 125 celsius degree(when v=0v) 

    0~ 60 celsius degree(when v=vmax)

4. the withstanding voltage can reach to over 420-1000vac;

5. the resistance will not drift in normal temperature.

6. small dimension   

7. complete specifications 

8. stable delayed time 

9. rohs compliance

dimension(unit: mm):

marking of part number:

1.series:ptc thermistor for electronic ballast or energy-saving lamp starter                          

2.chip size: 05-5mm                                                                                                        

3.curie temperature: h-75℃       n-100℃     p-120℃       k-125℃                                                                                           

4.r25 resistance:501-500ω          222-2200ω              332-3300ω

5.resistance tolerance：k /-10%    m /-20%    h /-25%     n /-30%  

6.max voltage: 700-700v

7.wire shape: s-straight         a-axis formed         u-in-formed

specification&part no.: