晶閘管又稱可控硅、閘流

晶體管，屬半控型功率器件，可用于可控整流、交流調(diào)壓、保護(hù)、無(wú)觸點(diǎn)電子開(kāi)關(guān)、

逆變及變頻領(lǐng)域等。作為基礎(chǔ)型功率半導(dǎo)體分立器件，晶閘管具有電壓和電流容量

相對(duì)較高，可靠性較高，價(jià)格低等優(yōu)勢(shì)，保證客戶在使用過(guò)程中提高終端產(chǎn)品的良

品率、減少維修費(fèi)用，具有突出的性價(jià)比優(yōu)勢(shì)，有其不可替代的存在意義。

在各廠商晶閘管的下游客戶看，歐

美廠商晶閘管終端應(yīng)用廣泛，但由于晶閘管技術(shù)成熟且門(mén)檻較低，英飛凌等國(guó)際大

廠如今逐漸將重心轉(zhuǎn)向新能源汽車、通信等毛利率較高的領(lǐng)域，不斷退出中低端市

場(chǎng)；而以捷捷微電為主的大陸廠商則集中在白色家電、小家電、光伏、低壓電器、

安防、照明、電表等中低端領(lǐng)域。國(guó)內(nèi)企業(yè)憑借高性價(jià)比，貼合大陸市場(chǎng)，服務(wù)到

位等競(jìng)爭(zhēng)優(yōu)勢(shì)，有望承接全球晶閘管產(chǎn)能轉(zhuǎn)移，市場(chǎng)份額有望不斷提升。

半導(dǎo)體防護(hù)器件是安裝于電路中，當(dāng)電路出現(xiàn)過(guò)電流、過(guò)電壓或過(guò)熱等過(guò)載情

況時(shí)，會(huì)自發(fā)引發(fā)相關(guān)功能部位的熔斷、電阻突變或其它物理變化，從而切斷電路

或抑制電流、電壓的突變，起到保護(hù)電路，保護(hù)電子電力設(shè)備作用的一類元器件，

理論上屬于二極管，種類繁多，主要有半導(dǎo)體放電管（TSS）、瞬態(tài)抑制二極管（TVS）、

靜電防護(hù)元件（ESD）、高壓觸發(fā)二極管（SIDAC）等，可應(yīng)用于汽車電子、手機(jī)、

戶外安防、電腦主機(jī)等各類需要防浪涌沖擊、防靜電的電子產(chǎn)品內(nèi)部，防護(hù)內(nèi)部昂

貴的電子電路。

21 世紀(jì)以前，電路保護(hù)元器件一直處于平穩(wěn)增長(zhǎng)的態(tài)勢(shì)，自 21 世紀(jì)以來(lái)，受

益于數(shù)字技術(shù)、通訊技術(shù)、新能源等多種新技術(shù)的發(fā)展，電路保護(hù)元器件迅速增長(zhǎng)。

在這個(gè)領(lǐng)域，我國(guó)一直是處于相對(duì)落后的位臵，競(jìng)爭(zhēng)力較弱，相比于歐美和日本來(lái)

說(shuō)，我國(guó)電路保護(hù)元器件一直依靠人力成本和產(chǎn)品的性價(jià)比等優(yōu)勢(shì)，在細(xì)分領(lǐng)域逐

漸建立起優(yōu)勢(shì)。

Thyristor, also known as thyristor, thyristor

Transistors are semi controlled power devices that can be used for controllable rectification, AC voltage regulation, protection, contactless electronic switches

Inverter and frequency conversion fields. As a basic power semiconductor discrete device, thyristor has voltage and current capacities

Relatively high reliability, low price and other advantages ensure that customers improve the quality of terminal products during use

Product rate and reduced maintenance costs have outstanding cost performance advantages and irreplaceable significance.

From the perspective of downstream customers of various manufacturers of thyristor

Thyristor terminals from American manufacturers are widely used, but due to mature thyristor technology and low threshold, international giants such as Infineon

The factory is gradually shifting its focus to areas with high gross profit margins such as new energy vehicles and communications, and is constantly exiting the mid to low end market

Field; While mainland manufacturers, mainly focusing on Jiejie Microelectronics, focus on white appliances, small appliances, photovoltaic, low-voltage appliances

Middle and low end fields such as security, lighting, electricity meters, etc. Domestic enterprises rely on high cost performance, fit the mainland market, and serve

With competitive advantages such as position, it is expected to undertake the transfer of global thyristor production capacity, and its market share is expected to continuously increase.

Semiconductor protective devices are installed in a circuit to prevent overloads such as overcurrent, overvoltage, or overheating

In this case, it will spontaneously cause fusing, sudden resistance changes, or other physical changes in the relevant functional areas, thereby cutting off the circuit

Or a class of components that inhibit sudden changes in current and voltage, and protect circuits and electronic and power equipment,

Theoretically, it belongs to a wide range of diodes, mainly including semiconductor discharge tubes (TSS), transient suppression diodes (TVS)

Electrostatic protection components (ESD), high-voltage trigger diodes (SIDAC), etc., can be applied to automotive electronics, mobile phones

Outdoor security, computer hosts, and other electronic products that need to be protected against surge impact and static electricity

Expensive electronic circuits.

Before the 21st century, circuit protection components have been in a steady growth trend. Since the 21st century

Benefiting from the development of various new technologies such as digital technology, communication technology, and new energy, circuit protection components have grown rapidly.

In this field, China has always been in a relatively backward position, with weak competitiveness. Compared to Europe, the United States, and Japan

Said that China's circuit protection components have always relied on advantages such as labor costs and product cost performance

Gradually establish advantages.