描述

5SHX2645L0002 可控硅分單向可控硅和雙向可控硅兩種

可控硅分單向可控硅和雙向可控硅兩種，都是三個電極。單向可控硅有陰極（K）、陽極（A）、控制極（G）。雙向可控硅等效于兩只單項可控硅反向并聯(lián)而成。即其中一只單向硅陽極與另一只陰極相邊連，其引出端稱T2極，其中一只單向硅陰極與另一只陽極相連，其引出端稱T2極，剩下則為控制極（G）。

1、單、雙向可控硅的判別：先任測兩個極，若正、反測指針均不動（R×1擋），可能是A、K或G、A極（對單向可控硅）也可能是T2、T1或T2、G極（對雙向可控硅）。若其中有一次測量指示為幾十至幾百歐，則必為單向可控硅。且紅筆所接為K極，黑筆接的為G極，剩下即為A極。若正、反向測批示均為幾十至幾百歐，則必為雙向可控硅。再將旋鈕撥至R×1或R×10擋復(fù)測，其中必有一次阻值稍大，則稍大的一次紅筆接的為G極，黑筆所接為T1極，余下是T2極。

可控硅都有哪些種類呢？

相信大家對于雙向可控硅的概念都比較了解了，那么雙向可控硅到底有哪些種類呢？其實按照不同的分類方法進(jìn)行區(qū)分就會有很多不一樣的種類。

①依照電流容量進(jìn)行劃分：大功率可控硅、中功率可控硅以及小功率可控硅。一般情況下大功率可控硅應(yīng)用的是金屬殼封裝，中、小功率可控硅通常使用塑封以及陶瓷來進(jìn)行封裝。

②依照關(guān)斷速度進(jìn)行劃分：普通可控硅與高頻可控硅兩大類。

③依照封裝方式進(jìn)行劃分：金屬封裝可控硅、塑封可控硅以及陶瓷封裝可控硅。金屬封裝可控硅還可以分成螺栓形、平板形以及圓殼形三個種類，塑封可控硅又包含帶散熱片型與不帶散熱片型兩類。

④依照關(guān)斷、導(dǎo)通和控制方法進(jìn)行劃分：逆導(dǎo)可控硅、雙向可控硅、普通可控硅、門極關(guān)斷可控硅、BTG可控硅、溫控可控硅以及光控可控硅等等。

⑤依照引腳與極性進(jìn)行劃分：二極可控硅、三極可控硅與四極可控硅。

 

5SHX2645L0002 可控硅分單向可控硅和雙向可控硅兩種

Thyristors are divided into unidirectional thyristors and bidirectional thyristors, which are three electrodes. A unidirectional thyristor has a cathode (K), an anode (A) and a control pole (G). Bidirectional thyristors are equivalent to two single thyristors in reverse parallel. That is, one of the unidirectional silicon anode is connected with another cathode, the leading end is called T2 pole, one of the unidirectional silicon cathode is connected with the other anode, the leading end is called T2 pole, and the remaining is the control pole (G).

1, single, bidirectional thyristor discrimination: first test two poles, if the positive and negative test pointer are not moving (R×1 stop), it may be A, K or G, A pole (for unidirectional thyristor) may also be T2, T1 or T2, G pole (for bidirectional thyristor). If one of the measurements indicates tens to hundreds of euros, it must be a unidirectional thyristor. And the red pen is connected to the K pole, the black pen is connected to the G pole, and the rest is the A pole. If the positive and reverse test instructions are tens to hundreds of euros, it must be bidirectional thyristor. Then turn the knob to R×1 or R×10 stop retest, one of which must have a slightly larger resistance value, then a slightly larger red pen is connected to the G pole, the black pen is connected to the T1 pole, and the rest is the T2 pole.

What kinds of thyristors are there?

I believe that we have a better understanding of the concept of bidirectional thyristor, so what kinds of bidirectional thyristor are there? In fact, according to different classification methods to distinguish, there will be many different types.

① Divided according to current capacity: high-power thyristor, medium-power thyristor and low-power thyristor. Under normal circumstances, high-power thyristors are used in metal shell packaging, and medium and small power thyristors are usually packaged using plastic sealing and ceramics.

② According to the turn-off speed, it is divided into two categories: ordinary thyristor and high-frequency thyristor.

(3) According to the packaging method, it is divided into metal packaging thyristor, plastic packaging thyristor and ceramic packaging thyristor. Metal-encapsulated thyristors can also be divided into three types: bolt-shaped, flat-shaped and round shell, and plastic-sealed thyristors include two types with and without heat sinks.

④ According to the turn-off, turn-on and control method, it is divided into: reverse conduction thyristor, bidirectional thyristor, ordinary thyristor, gate turn-off thyristor, BTG thyristor, temperature controlled thyristor and optical controlled thyristor, etc.

⑤ According to the pin and polarity, it is divided: two pole thyristor, three pole thyristor and four pole thyristor.

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