Degaussing 18 OHM Positive Temperature Coefficient PTC Thermistor MZ71-18RM

Degaussing 18 OHM Positive Temperature Coefficient PTC Thermistor MZ71-18RM

Product Details:

Place of Origin: China
Brand Name: Tian Rui
Certification: ROHS
Model Number: MZ71-18RM

Payment & Shipping Terms:

Minimum Order Quantity: 1000PCS
Price: USD0.04-0.05PCS
Packaging Details: 1000PCS/Bag
Delivery Time: 5-7 Days
Payment Terms: D/P, T/T,Paypal, Western Union
Supply Ability: 1000000PCS/Month
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Detail Information

Name: MZ71-18RM Thermistor Resistance: 18 OHM
Tolerance: 30% Voltage Rating: 220V Vrms
Max Voltage: 270V Vrms Min Degaussing Coil Resistance: 12 OHM
Curie Temperature: 60±7℃ Coating: Silicone
Color: Green
High Light:

MZ71-18RM PTC Thermistor

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18 OHM PTC Thermistor

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Degaussing Positive Temperature Coefficient Thermistor

Product Description

 

Degaussing 7.5MM 18 OHM Positive Coefficient Ceramic MZ71 MZ71-18RM PTC Thermistor

 

MZ7 PTC thermistor are used as automatic degaussing components in color TVs and color displays, and current-limiting components in AC circuits.

 

MZ71, 72, 73 series PTC thermistors and Degaussing PTC Thermistorare mainly used in degaussing circuits of color TVs, displays and other CRTs, which can effectively eliminate image distortion, abnormal colors or irregular images caused by stray magnetic fields, and make color The picture is 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.

 

In order to eliminate image distortion, abnormal colors or irregular images caused by stray magnetic fields, automatic degaussing circuits are designed in color TVs and color displays, which are composed of PTC thermistors & degaussing resistors and degaussing coils. The principle is to add energy every time when the machine is turned on, and gradually remove the energy after normal operation, so that the electron beam is affected by the deflection coil without being affected by any external stray magnetic field. When the machine is turned on, the PTC thermistor & degaussing resistor In a low resistance state, a large current is formed in the degaussing coil, and the magnetic field line is greater than 350At, which can effectively eliminate the influence of stray magnetic fields. Then the PTC thermistor & degaussing resistor enters a high resistance state under the influence of a large current, the loop current is automatically attenuated, the residual current is very small, and it is almost open, and the magnetic field line is reduced to below 0.03At, reaching the acceptable limit under normal operation.

 

Advantage

1. Has a large inrush current;
2. Low residual current;
3. Very high withstand voltage strength;
4. High impact resistance;
5. High reliability;
6. Reliable product quality;
7. Low power consumption;
8. Small size suitable for PCB;
9. No contact, no noise, long product life;
10. The product's own characteristics enable it to control the current without other controllers.
11. Comply with RoHS requirements.

 

Degaussing 18 OHM Positive Temperature Coefficient PTC Thermistor MZ71-18RM 0

Code Name Technical Requirements Lead shape
D Diameter 14.5max □Straight

□Axis bend

■Informing
T Thickness 6.0max
L Length 3-5MM
W Pitch 7.5±1.0
d Lead diameter 0.7±0.05

 

Coating 

Coating Material Color
■Coating
□No Coating
□Phenolic Resin■Silicone
□Epoxy resin □Other
■Green □Red □Yellow □Black □Blue

 

Marking 

Marking Example
■ Marked
□ Without Mark
MZ71-18RM AC270V


Lead Wire 

■Tinned Steel Wire □Tinned copper wire

 

 

Part Numbering


Degaussing 18 OHM Positive Temperature Coefficient PTC Thermistor MZ71-18RM 1

 

Electrical Performances

 

No. Item Spec Test Condition
4-1 Nominal resistance 18Ω±30% Put it at 25±2℃ for more than 2 hours,
Test at voltage below 1.5VDC.
4-2 R-T characteristic See Fig. 2 R-T characteristic special tester.
4-3 Rated Voltage 220 Vrms Operating temperature range: -10℃~+60℃
4-4 Max Voltage 270 Vrms
4-5 Min degaussing coil resistance 12Ω  
4-6 Current decay characteristics:
Break into
After 3 sec
After 30 sec


>20 Ap-p
<180 mAp-p
<10 mArms
Temperature: 25±2℃,
Test in still air,
Test circuit: as shown in Fig. 1
Test voltage: 220Vrms (50-60Hz)
4-7 Curie temperature 60±7℃  

 

Degaussing 18 OHM Positive Temperature Coefficient PTC Thermistor MZ71-18RM 2

Degaussing 18 OHM Positive Temperature Coefficient PTC Thermistor MZ71-18RM 3

 

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