供应***灯用*启动型PTC热敏电阻器

*灯、电子镇流器*“*型”PTC热敏电阻

一、  概述

热敏电阻（PTCR）应用在电子镇流器、*灯作为预热软启动，能大大*灯管的开关次数和使用寿命。我司致力于预热软启动PTC热敏电阻的研究、生产十余年，积累了丰富的经验，以“诚信立本，*为先”的经营理念，为客户提供质量稳定，品质*的产品，*广大客户的信赖。*著名电光源企业Philips、GE（中国）、IKEA、Megaman、Osram（中国）、TCL等都使用本公司生产的热敏电阻，年产销量*亿只，在国内、外同行业中市场占有量名列前茅，产品数量*、*，*业界*潮流：

1          能延长灯管寿命10*。

2          耐电压能力*800或1100VAC以上。

3          PTC开关通电100000次以上，常温电阻值不漂移。

二、  主要用途

如果*灯灯丝未经预热突加高压启动将导致灯丝材料严重溅射，使灯管提前发黑报废！使用MZ3型PTC热敏电阻，在启动时先预热灯丝1s左右，然后再加高压点亮灯管，能*地*灯管两端发黑，同时能*三级管等灯具线路元件受启动*大电流及高反压冲击，使灯具寿命延长10*。

三、  工作原理

如图所示，接通电源*，Rt处于常温状态，其阻值远低于C阻*，电流通过Rt形成回路预热灯丝，经过1S左右，Rt阶跃到达高阻状态，近似开路，电流通过C形成回路导致LC谐振产生高压使灯管点亮。

四、  规格参数

五、 使用指南

1、     线路参数不同，使用环境温度不同，*时间也不同。在*环境使用的灯具，如用作冰柜照明等由于环境温度较低建议作环境模拟试验。出口不同地区的灯具，要考虑该地区冬天时的环境温度，如出口到北欧地区的灯具，选用PTCR时延迟时间不可太长。

2、     电阻值范围的选择以需要的延迟时间确定，为*延迟时间一致性，一般为±25％左右为宜。

3、     若需延长*时间，建议对PTCR:(1)选阻值小一些；（2）选体积大一些；（3）选Tc高一些。反之亦然。

4、     大功率灯具冲击电流较大不宜选用小体积PTCR。

5、     启动线路为单电容启动的灯具，PTCR耐压要求较高，*好选800VAC以上。

6、     推荐选用PTCR规格（下表为我公司长期试验的结果，用于一般灯具线路，由于各厂家线路有异，选用PTCR时以*1秒左右为佳）：

Delay-Time PTC Thermistors for Lamps and Lanterns

   Features of Products:

With the development of global energy conservation, PTC Thermistors for electronic ballast softly starting has attracted more and more public attention. The traditional ballast starting, added high-pressure filament material suddenly without preheating, will take serious sputter and loss, and make the light turn black and scrap ahead of time. However, the electronic ballasts we have researched and developed, have been through preheating and high pressure. Lighting the tube, the filament material can only produce slight sputter, and can extend the light life span greatly. Tests by some authority organizations have indicated: Using PTC Thermistor to delay starting, can change the hard starting to pre-heating starting of the electronic ballasts and electronic power-saving lamps. The pre-heating time of wires can reach to 0.4-2.0 seconds. Such electronic ballasts can make the lamp service prolonged to more than 5 times.

Working Theories:

When the high frequency shaking return circuit has been put through, and because PTC is in a cold state and Rt is in a low state of resistance, its resistance value is far lower than that of C2, and the light pressure is smaller than that of starting it. Then current through C1, RT forms the return circuit-preheating filament. Meanwhile, PTC Thermistor is heated to above the Curie temperature, Rt heating temperature exceeding the switch temperature TSW and leaping to the state of high resistance too. Its resistance value is far higher than that of C2, and the current goes through C1, C2, forming the return circuit and causing LC resonance and producing high pressure and lighting the tube. Generally speaking, to delay the preheating time, we should select the relatively lower resistance, taller Tc point and bigger PTC Thermistor.

Main Applications

  Products are mainly applied in fluorescence lamp electronic ballasts, electronic power-saving lamps, and triggers.