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Durable Lighting Switching PTC Thermistor / Chip Thermistor For Preheated Start
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Durable Lighting Switching PTC Thermistor / Chip Thermistor For Preheated Start

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Durable Lighting Switching PTC Thermistor / Chip Thermistor For Preheated Start

 

Quick Details

 

• Reliable lamp starting, due to well defined inrush-current generated time delay
• Accurate resistance for ease of circuit design
• Small size and durable
• Available bulk-packed or taped-on-reel
• Long life: More than 20 000 starts for a 20 W CFL lamp
• Compliant to RoHS directive 2002/95/EC and in accordance to WEEE 2002/96/EC

 

 

Description

 

 

Lighting Switching PTC Thermistor are used when a load in series with the PTC thermistor has to be switched off after a time delay and when switching occurs frequently.
A typical application of switching PTC thermistor is the preheating of electrode in energy-saving lamps or fluorescent lamps. Switching PTC can also be used as a power resistor for loading a capacitor, for example in power supplies or in control units of production equipment.
 
 

Application

 
It's applicable to various types of fluorescent lamp, electronic ballast and electronic energy-saving lamp. The PTC can be connected across the lamp resonator without changing the circuits. It can change hard start of the ballast and electronic energy-saving lamp to preheated start and the preheating time of the filament can come up to 0.4-2 seconds, which will extend the service life of the fluorescent tube by over 4 times.
 
 

Specification

 

 

Switching PTC thermistors Operating Principle

Lighting Switching PTC thermistor Application Circuit

The application of the PTC thermistor to achieve preheated start is as follows: Immediately after power is switched on, Rt is in normal temperature state and its resistance is far lower than the C2 resistance. The current through C1 and Rt forms a return circuit to preheat the filament. After about 0.4-2 seconds, Rt joule heat temperature exceeds Curie point Tsc and skips into high resistance state of far higher than C2 resistance. The current passes through C1 and C2 to form a return circuit, which causes L resonance and produces high voltage to light the fluorescent tube.


PTC thermistors lighting time delay switch off characteristics
PTC Thermistors Delay operation of relay
Circuit of PTC Thermistors Delay operation of relay

 

Lighting Switching PTC Thermistors Dimensional Drawings

Lighting Switching PTC thermistors Dimensional DrawingsPart

Dimension (mm)

Dmax

Tmax

Fd

F

MZ31-03 series

4.5mm

5.0mm

0.5mm

5.0mm

MZ31-05 series

6.5mm

5.0mm

0.6mm

5.0mm

MZ31-07 series

8.0mm

5.0mm

0.6mm

5.0mm
PTC Thermistor for Lighting Time Delay and Switching Starting Application Data Sheet

Part No.

Switching
Temperature

(Centigrade)

Resistance

at +25

(ohm)
R25

Max. Voltage

(vAC)

MZ31-03 series

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Mr. James
Tel: 86-769-86183707
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Dongguan Uchi Electronics Co.,Ltd.
Samsung Industrial Park,Yucai Road, Dongguan, Guangdong, China (Mainland)
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