soldering leads ptc thermistor for degaussing of colour tv,colour monitor chromoscope,mz 71 series-九游会下载

article no.：mz71-7r/9r/12r/14r/18r/27r

rated zero power resistor: 7ω/9ω/12ω/14ω/18ω/27ω

type: welded lead type

function: color tv degaussing

brief introduction of ptc thermistor for degaussing:

the mz71 series degaussing ptc thermistor is mainly used in color tv sets, displays, and other crt demagnetization circuits, 

which can effectively eliminate image distortion, abnormal colors, or irregular color spots caused by scattered magnetic fields.

make the color picture more vivid and clearer. it has the advantages of low residual current and good reliability. 

at present, the development trend of automatic degaussing ptc thermistors is small size, low resistance, low residual current, high impact resistance and high reliability.

dimension(unit: mm):

product application of ptc thermistor for degaussing:

colour tv's,colour monitors and other crt degaussing loop

working principle of ptc thermistor for degaussing:

degaussing ptc thermistor is using its current-time characteristics of the work. string of degaussing circuits, 

because very small initial resistance of ptc thermistor, 

big initial current through the degaussing coil that produce a powerful alternating magnetic field in the coil. 

ptc thermistor resistance then rise due to its own fever, the current in the circuit will be attenuation gradually, 

and make the coil alternating magnetic field also weakens to achieve degaussing purpose.

in order to eliminate image distortion,abnormal colour or irregular colour plaques caused by the stray magnetic field,

automatic degaussing loop is designed for colour tvs and colour monitors,

which is combined with ptc thermistors and degaussing coil. its principle is incentiving energy when turning on each time, 

and then removed energy gradually after normal operation, 

which can effect electron beam by partial coil, and do not suffer influence of any outside stray magnetic field.

ptc thermistor is in low resistance state when connecting to power, large current is formed in the degaussing coil, 

more than 350 at magnetic line of force, can eliminate the influence of stray magnetic field effectively. 

with the ptc thermistors into high resistance state under the influence of high current, the loop current to be attenuation automatically, 

residual current is very small that like open circuit approximately, reduced to 0.03 at magnetic line of force,to the acceptable limits under normal operation.

advantages of ptc thermistor for degaussing:

1.large inrush current;

2.low residual current;

3.high withstand voltage;

4.high resistance to impact;

5.excellent long-term reliability;

6.stable performance range;

7.low power consumption;

8.small size suits for pcb;

9.no junction or noise,long using life;.

10.can control current well without other controller

11.rohs-compatible 

marking of part number of ptc thermistor for degaussing:

1.series:ptc thermistor for crt's degaussing loop of colour tv,colour monitor-mz7 series

2.type:

   1-soldering leads type of ptc thermistor for degaussing:

   2-encased type(single-element) of ptc thermistor for degaussing:

   3-encased type(double-element) of ptc thermistor for degaussing:

3.rated zero power resistance:18r-18ω, 9r-9ω

4.tolerance of resistance:m- /-20%, v- /-25%,  x- 30%/-20%

5.max. operating voltage:270-270vac      140-140vac   

6.special code: r-compliance with rohs(e.g. pb free).