描述

可控硅全稱“可控硅整流元件”（Silicon Controlled Rectifier），簡寫為SCR，別名晶體閘流管（Thyristor），是一種具有三個PN結(jié)、四層結(jié)構(gòu)的大功率半導體器件?？煽毓梵w積小、結(jié)構(gòu)簡單、功能強，可起到變頻、整流、逆變、無觸點開關(guān)等多種作用，因此現(xiàn)已被應用于各種電子產(chǎn)品中，如調(diào)光燈、攝像機、無線電遙控、組合音響等?？煽毓柰耆珜ê螅鬟^A、K兩極的電流即為通態(tài)電流IT（On-State Current），實際應用時，VAK通常是交流電壓（如220VAC），因此常將此參數(shù)標記為通態(tài)平均電流IT（RMS），指可控硅元件可以連續(xù)通過的工頻正弦半波電流（在一個周期內(nèi)）的平均值，而此時流過G、K兩極的電流即為門極電流IG（Gate Current），這個門極控制電流不應超過門極大峰值電流IGM（Forward Peak Gate Voltage）當VAK是交流電源的負半周時，可控硅因為A、K兩極加反向電壓而阻斷，此時允許施加的大電壓稱為反向重復峰值電壓VRRM（Peak Repetitive Reverse Blocking Voltage），由于可控硅阻斷時的電阻不是無窮大，此時的電流稱之為反向重復峰值電流IRRM（Peak Repetitive Reverse Blocking Current）。這兩個值與之前介紹的IDRM、VDRM是一樣的，只不過IDRM、VDRM是在控制G極斷開、可控硅阻斷狀態(tài)下測量的，而IRRM、VRRM是在可控硅A、K極接反向電壓下測量的。如果在可控硅陽極A與陰極K間加上反向電壓時，開始可控硅處于反向阻斷狀態(tài)，只有很小的反向漏電流流過。當反向電壓增大到某一數(shù)值時，反向漏電流急劇增大，這時，所對應的電壓稱為反向不重復峰值電壓VRSM（Peak Non-Repetitive Surge Voltage）。

The full name of thyristor is “Silicon Controlled Rectifier”, abbreviated as SCR, also known as Thyristor. It is a high-power semiconductor device with three PN junctions and four layer structure. Silicon controlled rectifier has small size, simple structure, and strong functions, which can play various roles such as frequency conversion, rectification, inverter, contactless switch, etc. Therefore, it has been applied in various electronic products, such as dimmers, cameras, radio remote control, combination audio, etc. After the thyristor is fully conductive, the current flowing through the A and K poles is called the on state current IT (On State Current). In practical applications, VAK is usually an AC voltage (such as 220VAC), so this parameter is often marked as the on state average current IT (RMS), which refers to the average power frequency sine half wave current (within a cycle) that the thyristor component can continuously pass through. At this time, the current flowing through the G and K poles is called the gate current IG (Gate Current), The gate control current should not exceed the maximum gate peak current IGM (Forward Peak Gate Voltage). When VAK is the negative half cycle of the AC power supply, the thyristor is blocked due to the reverse voltage applied to the A and K poles. At this time, the allowed large voltage is called the Peak Repetitive Reverse Blocking Voltage VRRM (Peak Repetitive Reverse Blocking Voltage). Since the resistance when the thyristor is blocked is not infinite, The current at this time is called the Peak Repetitive Reverse Blocking Current (IRRM). These two values are the same as the previously introduced IDRM and VDRM, except that IDRM and VDRM are measured under the control of G pole disconnection and thyristor blocking state, while IRRM and VRRM are measured under the reverse voltage of thyristor A and K pole connection. If a reverse voltage is applied between the anode A and cathode K of the thyristor, the thyristor begins to be in a reverse blocking state, with only a small reverse leakage current flowing through. When the reverse voltage increases to a certain value, the reverse leakage current sharply increases, and the corresponding voltage is called the Peak Non Repetitive Surge Voltage (VRSM).

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Chengdu Sunshine Xihe Co., Ltd. specializes in one-stop procurement consulting for imported industrial spare parts, offering original equipment and professional discontinued parts services. We are committed to providing efficient and reliable automation solutions for our customers. Customer support fast responseThe network of partners spans all continentsGlobal partner networkAlways achieve more delivery, be it parts, service or speed



始終實現(xiàn)更多的交付，無論是零件、服務還是速度