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in Thyristors
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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
Part No. Variations
- 7343
- 734302
- 734302019000
- 734303
- 734305019000
- 7343133
- 7343137
- 7343195
- 7343233
- 734324L28IH
- 73432SUBCH2S400X9
- 73432SURCH2S400A
- 73432SURCH2S530A
- 73432SURCS400A8
- 73432USOCH2S400A
- 73432USOCH2S530A
- 734332
- 734332019000
- 7343518
- 734362
- 7343721
- 7343750001
- 734381
- 7343810001
- 7343820003
- 73439001
- 7343990001500
- 7343FT9724780
- 7343MD9AQE
- 7343R7C2AQSBMS
- 7343USRCS10292
- 7343USRCS1060