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Thyristors

A thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. They act exclusively as bistable switches, conducting when their gate receives a current trigger, and continue to conduct while they are forward biased (that is, while the voltage across the device is not reversed). A three-lead thyristor is designed to control the larger current of its two leads by combining that current with the smaller current or voltage of its other lead - known as its control lead. In contrast, a two-lead thyristor is designed to 'switch on' if the potential difference between its leads is sufficiently large - a value representing its breakdown voltage. Some sources define silicon-controlled rectifiers and thyristors as synonymous. Other sources define thyristors as a larger set of devices with at least four layers of alternating N and P-type material. The first thyristor devices were released commercially in 1956. Because thyristors can control a relatively large amount of power and voltage with a small device, they find wide application in control of electric power, ranging from light dimmers and electric motor speed control to high-voltage direct current power transmission. Thyristors may be used in power-switching circuits, relay-replacement circuits, inverter circuits, oscillator circuits, level-detector circuits, chopper circuits, light-dimming circuits, low-cost timer circuits, logic circuits, speed-control circuits, phase-control circuits, etc. Originally thyristors relied only on current reversal to turn them off, making them difficult to apply for direct current; newer device types can be turned on and off through the control gate signal. A thyristor is not a proportional device like a transistor. In other words, a thyristor can only be fully on or off, while a transistor can lie in between on and off states. This makes a thyristor unsuitable as an analog amplifier, but useful as a switch.

Transistor > Thyristors > Rectifiers

型号	DS	厂牌	批号	数量	地区	采购
STPS340U		STM	-	20000	香港	要求报价
STPS340U		STM	-	2160	法国	要求报价
STPS340U		STM	-	2600	法国	要求报价
STPS340U		STM	2006+	6897	法国	要求报价
STPS340U		STM	2004+	3850	英国	要求报价
STPS340U		STM	2008+	3368	英国	要求报价
STPS340U		STM	2023+	2500	加拿大	要求报价
STPS340U		STM	-	7500	台湾	要求报价
STPS340U		STM	2018	4000	香港	要求报价
STPS340U		STM	-	2369540	日本	要求报价
STPS340U		STM	-	10000	中国	要求报价
STPS340U		STM	-	2758	德国	要求报价
STPS340U		STM	200610	1459	德国	要求报价
STPS340U		STM	200613	752	德国	要求报价
STPS340U		STM	200618	1917	德国	要求报价
STPS340U		STM	200622	1615	德国	要求报价
STPS340U		STM	200720	436	德国	要求报价
STPS340U		STM	200735	801	德国	要求报价
STPS340U		STM	200748	2300	德国	要求报价
STPS340U		STM	200827	7	德国	要求报价
STPS340U		STM	200843	2502	德国	要求报价
STPS340U		STM	200844	5094	德国	要求报价
STPS340U		STM	200942	100	德国	要求报价
STPS340U		STM	201137	2075	德国	要求报价
STPS340U		STM	201248	309	德国	要求报价

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