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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 > FET Transistors > MOSFET

型号	DS	厂牌	批号	数量	地区	采购
FDV304P		Fairchild	200923+	4938	中国	要求报价
FDV304P		Fairchild	201321	709	西班牙	要求报价
FDV304P		Fairchild	201206	1518	以色列	要求报价
FDV304P		Fairchild	2011+	4398	瑞典	要求报价
FDV304P		Fairchild	201525	540	美国	要求报价
FDV304P		Fairchild	2006	2732	美国	要求报价
FDV304P		Fairchild	2011+	63	以色列	要求报价
FDV304P		Fairchild	199924	5948	以色列	要求报价
FDV304P		Fairchild	200750	2268	西班牙	要求报价
FDV304P		Fairchild	201314	725	西班牙	要求报价
FDV304P		Fairchild	2000+	2665	台湾	要求报价
FDV304P		Fairchild	-	1721	美国	要求报价
FDV304P		Fairchild	2016+	4439	韩国	要求报价
FDV304P		Fairchild	199924+	45000	台湾	要求报价
FDV304P		Fairchild	201720	480	西班牙	要求报价
FDV304P		Fairchild	-	41	美国	要求报价
FDV304P		Fairchild	200849	343	西班牙	要求报价
FDV304P		Fairchild	201525	1407	西班牙	要求报价
FDV304P		Fairchild	200344	1367	西班牙	要求报价
FDV304P		Fairchild	201138	355	西班牙	要求报价
FDV304P		Fairchild	-	7500	中国	要求报价
FDV304P		Fairchild	200012	314	西班牙	要求报价
FDV304P		Fairchild	2023+	54000	中国	要求报价
FDV304P		Fairchild	201723+	9000	中国	要求报价
FDV304P		Fairchild	-	85300	新加坡	要求报价

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