Home > PRODUCTS > PTC Thermistors > Soldering leads PTC thermistor for degaussing of color TV, color monitor chromoscope-MZ 71 series

  • Functional characteristics
  • Details of PTC thermistor MZ 71 series:
    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 primarily used in color TV sets, displays, and other CRT demagnetization circuits to effectively eliminate image distortion, abnormal colors, or irregular color spots caused by scattered magnetic fields. These thermistors enhance color picture vividness and clarity with advantages such as low residual current and excellent reliability. Currently, the trend in automatic degaussing PTC thermistors is towards smaller size, lower resistance, low residual current, high impact resistance and high reliability.

    Dimension (Unit: mm)

    Technical drawing of MZ71 series PTC thermistor dimensions for color TV degaussing

    Dimensions of MZ71 series PTC thermistor for color TV degaussing applications, including detail measurements and part identification.

    Product Application
    Our PTC thermistors are ideal for degaussing loops in color TVs, color monitors, and other CRT applications.

    Working Principle
    A degaussing PTC thermistor operates using its current-time characteristics. When included in degaussing circuits, the PTC thermistor’s initial low resistance allows a large initial current to pass through the degaussing coil, generating a powerful alternating magnetic field. As the PTC thermistor heats up, its resistance increases, reducing the current in the circuit and weakening the magnetic field of the coil to achieve degaussing. This process effectively eliminates image distortion and abnormal colors caused by stray magnetic fields.

    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 impact resistance
    5.Excellent long-term reliability
    6.Stable performance range
    7.Low power consumption
    8.Small size suitable for PCB
    9.No junction or noise, long lifespan
    10.Effective current control without additional controllers
    11.RoHS-compliant

    Marking of Part Number
    Refer to Figure 2 for the part number marking of the MZ71 series PTC thermistors.

    Part number breakdown for MZ71 series PTC thermistor

    Detailed breakdown of the part number components for MZ71 series PTC thermistors, showing how each segment of the part number is defined.


    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).
    [table id=6 /]
    Note:
    1. R 25 resistance tolerance can be selected per customer’s requirement.
    2. Encapsulation mode can be made per customer’s requirement.
    3. Wire shape kinked form can be selected.

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Soldering leads PTC thermistor for degaussing of color TV, color monitor chromoscope-MZ 71 series Soldering leads PTC thermistor for degaussing of color TV, color monitor chromoscope-MZ 71 series Soldering leads PTC thermistor for degaussing of color TV, color monitor chromoscope-MZ 71 series Soldering leads PTC thermistor for degaussing of color TV, color monitor chromoscope-MZ 71 series Soldering leads PTC thermistor for degaussing of color TV, color monitor chromoscope-MZ 71 series

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