无码人妻久久一区二区三区app,国产熟人av一二三区,国产亚洲精久久久久久无码77777,国产欧美综合一区二区三区

Hello! Welcome to the website of Dongguan Youchen Electronic Technology Co., Ltd.

Youchen Technology

Chip Capacitor/Electrolytic Capacitor/Ceramic Capacitor Supplier
18929295505
admin@dgyouchen.com
Current Page: Home > News > Corporate news
News

How to determine short circuit and leakage of SMD capacitors?

2020-08-19
In our daily use Chip capacitorThe common problems are false soldering, short circuit, electric leakage, breakdown, etc. How do we judge whether the patch capacitor is short circuited and electric leakage? Let's take a look at the specific judgment methods below .

What are the phenomena of short circuit and leakage of SMD capacitors? Here is an answer for you.

When the chip capacitor is disconnected, the DC will form an open circuit, leading to abnormal operation of the DC circuit. In other words, when the chip capacitor fails, we can determine whether the capacitor is through or leakage by measuring the DC voltage of the Test point in the circuit. After capacitor breakdown, it will only affect the local circuit of the capacitor.

Because in other circuits, capacitors are still isolated from DC. According to this principle, the maintenance scope can be shortened.

Short circuit and leakage of patch capacitors occur in different circuits, such as coupling circuit short circuit. DC current will directly flow to the next stage, so there should be no current noise, and filter capacitor breakdown may cause fuse.

What is the measurement method for short circuit and leakage of SMD capacitors? There are several methods below.

Method 1: Generally, the resistance value of a small capacitor is infinite, and the abnormal resistance value is replaced. If the capacitance decreases and the multimeter cannot measure it, replace it directly.

Method 2: Use a multimeter to ground one pole to the other and measure both ends of the capacitor. The sound at both ends indicates a short circuit.

Method 3: If the capacitance of the patch is short circuited, a multimeter can be used to measure it online to determine. If it is an open circuit and the capacity is too small to measure a multimeter, you can use a pen to connect a 220V live wire and place the pin of the chip capacitor on the pen cap to see if the neon light bulb is emitting light and the emitting capacitance is good. Otherwise, the circuit will be cut off. 220V voltage, but do not experiment on the board.

Method 4: The resistance value is infinite, a zero resistance value is considered bad, and there should be some small changes in other values.


Summary of issues related to short circuit and leakage of SMD capacitors. During use, it is important to pay attention to the following reasons:


The decrease in surface insulation caused by surface dirt leads to leakage, and this leakage current is not very large, usually at the microampere level. Internal cracks, welding cracks, and MLCC cause severe self suppression cracks, and the leakage current caused by these cracks will continue to increase. In severe cases, it can cause local explosions and fires.

Previous Page:What precautions can be taken to avoid damage to chip capacitors

Next Page:Basic knowledge and main applications of chip capacitors
Youchen Technology
Dongguan Youchen Electronic Technology Co., Ltd
Tel: 0769-85328400 8533526885336465
Fax: 0769-85308615
Email: admin@dgyouchen.com
Website: yzx.net.cn
Address: Floor 3, No. 7 Xinfeng Road, Shangsha Fourth Industrial Zone, Chang'an Town, Dongguan City, Guangdong Province
Yue ICP Bei No. 13008404
All rights reserved:Dongguan Youchen Electronic Technology Co., Ltd
In-line aluminum electrolytic capacitor manufacturer, SMT aluminum electrolytic capacitor manufacturer, direct sales, brand selection, model selection, price
Follow us:

Do you need our help? Welcome to leave your email!
18929295505  
2324774509
admin@dgyouchen.com
亚洲欧美精品伊人久久| 一进一出一爽又粗又大| 国产在线观看免费观看| 伊人久久久大香线蕉综合直播 | .精品久久久麻豆国产精品| 黑人巨大精品欧美| 免费无码不卡视频在线观看| 亚洲欧美国产精品无码中文字| 欧美mv日韩mv国产网站| 超清纯白嫩大学生无码网站| 亚洲精品午夜国产va久久成人| 日本熟妇色xxxxx日本免费看| 妺妺窝人体色www看人体| 国产精品涩涩涩视频网站| 亚洲精品无码av中文字幕电影网站| 久久人与动人物a级毛片| 乱码丰满人妻一二三区| 欧美三级午夜理伦三级| 少妇精品无码一区二区三区| 人妻无码久久一区二区三区免费| 少妇无码av无码专区| 久久久久久久综合狠狠综合| 精品国产乱码久久久久久婷婷| 国产精品99久久久久久www| 国产精品自在线拍国产| 97久久婷婷五月综合色d啪蜜芽| 欧美成人精品三级网站| 精品国产一区av天美传媒| 天美麻花果冻视频大全英文版| 国产精品无码av无码| 久久精品夜色噜噜亚洲a∨| 国产麻无矿码直接观看| 超碰人人模人人爽人人喊手机版| 中文字幕精品一二三四五六七八| 亚欧洲精品在线视频免费观看| 非洲黑人性xxxx精品| 精品国产一区二区三区av片| 欧美激情综合五月色丁香 | 国产两女互慰高潮视频在线观看| 国产精品美女久久久网av| 国产97色在线 | 日韩|