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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
- IRF4000TR
- IRF4014PBF
- IRF4039
- IRF4050
- IRF40B207
- IRF40F1
- IRF40H233ATMA1
- IRF40R207
- IRF40SC240ARMA1
- IRF4104
- IRF4104L
- IRF4104MOS
- IRF4104PBF
- IRF4104SMOS
- IRF4104SPBF
- IRF4104SPBFD
- IRF4105
- IRF413
- IRF417C
- IRF420
- IRF421
- IRF422
- IRF4229PBFMOS
- IRF422R
- IRF423
- IRF4243L2PBF
- IRF4243LDF2
- IRF4243LDF210
- IRF4243LDF212
- IRF4243LDF28
- IRF430
- IRF430R
- IRF431
- IRF432
- IRF433
- IRF440
- IRF440R
- IRF441
- IRF442
- IRF4427
- IRF442R
- IRF443
- IRF448
- IRF450
- IRF450CECC
- IRF450R
- IRF451
- IRF452
- IRF452R
- IRF453
- IRF460
- IRF460PBF
- IRF4610
- IRF4610PBF
- IRF462
- IRF46ER102K
- IRF46ER152K
- IRF46ER222K
- IRF46ER332K
- IRF46ER472K
- IRF46ER562K
- IRF46ER822K
- IRF470
- IRF489611
- IRF4905
- IRF4905L
- IRF4905LPBF
- IRF4905MOSFETIGBTIC
- IRF4905PBF
- IRF4905PBFMOS
- IRF4905PBFTO220
- IRF4905S
- IRF4905SHR
- IRF4905SMOS
- IRF4905SPBF
- IRF4905STRL
- IRF4905STRLPBF
- IRF4905STRLPBFIC
- IRF4905STRR
- IRF4905STRRPBF
- IRF4905TR
- IRF494PBF
- IRF4950PBF