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Silicon Controlled Switch (SCS)

 

 

Silicon controlled switches (SCS) are four-layer (PNPN) devices that are similar in construction to silicon controlled rectifiers (SCR). The SCS, however, has two gate terminals; a cathode gate and an anode gate. Silicon controlled switches can be turned on and off using either gate terminal. Applying a positive voltage between the cathode gate and cathode terminals turns on an SCS. It may be turned off (forced commutation) by applying a negative voltage between the anode and cathode terminals, or simply by shorting those two terminals together. The anode terminal must be kept positive with respect to the cathode in order for the SCS to latch.

Products & Services
Thyristors are a class of four-layer (PNPN) semiconductor devices that act as switches, rectifiers, or voltage regulators. Search by Specification | Learn more about Thyristors
Gate turn-off thyristors (GTOs) are four-layer PNPN devices that act as switches, rectifiers, and voltage regulators. Like other thyristors, GTOs can be turned on by the application of a positive gate signal (g > 0); however, unlike other more conventional devices that can be turned off only at a zero crossing of current, GTOs can be turned off at any time by the application of a gate signal equal to zero. Search by Specification | Learn more about Gate Turn-off (GTO) Thyristors
Silicon controlled rectifiers (SCR) are four-layer (PNPN) thyristors with three terminals: an input control terminal (gate), an output terminal (anode), and a terminal common to both the input and output (cathode). SCRs are used mainly with high voltages and currents, often to control alternating current (AC) where the change of sign causes the device to switch off automatically. Search by Specification | Learn more about Silicon Controlled Rectifiers (SCR)
Triacs are three-terminal silicon devices that are configured in an inverse parallel arrangement to provide load current during both halves of the AC supply voltage. They are often used to control motor speed. Search by Specification | Learn more about Triacs
Diacs are bi-directional diodes that switch AC voltages and trigger silicon controlled rectifiers (SCRs) and triacs. Except for a small leakage current, diacs do not conduct until the breakover voltage is reached. Search by Specification | Learn more about Diacs
Product Announcements
American Microsemiconductor, Inc. - Diodes, All Types of diodes, We Have Your Diode
In this discussion the term diode and rectifier will be used interchangeably, a low current rectifier implies a diode,and a high current or power device, conducting from 1 to 1000 amps or even higher,... (read more)
American Microsemiconductor, Inc. - Silicon Controlled Rectifier (SCR) by AMS
The Silicon Controlled Rectifier (SCR) is simply a conventional rectifier controlled by a gate signal. With over 17,000,000 electronic components sitting on our warehouse shelves we can almost... (read more)
S-Tek, Inc. - Full Color OLED Displays
OLED is Short for organic light-emitting diode, a display device that sandwiches carbon-based films between two charged electrodes, one a metallic cathode and one a transparent anode, usually being... (read more)
Inductotherm Group - Consarc - Vacuum Arc Remelting (VAR)
Consarc pioneered commercial ingot production using fully coaxial vacuum arc remelt (VAR) furnaces in the early 1960s. Consarc VARs offer fully automated melt control, precision electrode drive, X-Y... (read more)
Ellison Group - Plasma Spray Coatings
The Plasma Spray processes combines gases and electrical power to achieve high temperature capabilities with a broad base of materials, including ceramics. This thermal spray coating method protects... (read more)
American Microsemiconductor, Inc. - We have your Triacs
A triac is a electronic bidirectional switch (A bidirectional SCR) which can conduct current in either direction(AC) when it is triggered. With over 17,000,000 electronic components sitting on our... (read more)
California Eastern Laboratories - CEL - PS2841 4-channel SSOP12 Optocoupler
PS2841-4A and PS2841-4B are 4-channel Optocouplers in a single SSOP 12 package for high-density mounting applications. PS2841-4A is Common Cathode, PS2841-4B is Common Anode. (read more)
 
Topics of Interest
The thyristor family of semiconductors consists of several very useful devices. The most widely used of this family are silicon controlled rectifiers (SCRs), triacs, sidacs, and diacs. In many... (Read More)
Juan W. Dixon, Ph.D. Department of Electrical Engineering, Pontificia Universidad Cat lica de Chile Vicu a Mackenna 4860, Santiago, , Chile 12.1 Introduction Three-phase controlled... (Read More)
Shockley diodes are four-layer (PNPN) semiconductor devices that behave as a pair of interconnected PNP and NPN transistors. Like all thyristors, Shockley diodes tend to stay on once they have been... (Read More)
Angus Bryant, Ph.D. Department of Engineering, University of Warwick, Coventry CV4 7AL, , UK Enrico Santi, Ph.D. Department of Electrical Engineering, University of South Carolina,... (Read More)
4 Turn-Off Performances There are three ways to turn the thyristor off. Any thyristor structure can be turned-off if cathode-anode bias reduces to the value at which the cathode-anode current is... (Read More)
See more product announcements for Thyristors
SiBar Thyristor Surge Protectors

SiBar Thyristor Surge Protectors
Tyco Electronics, Raychem Circuit Protection Products


OLDIES BUT GOODIES: Try AMERICAN MICROSEMI

OLDIES BUT GOODIES: Try AMERICAN MICROSEMI
American Microsemiconductor, Inc.


Steel Weights Calculator - Figure Metal Weights

Steel Weights Calculator - Figure Metal Weights
All Metals & Forge


11 See more product announcements for Thyristors