Thyristors are a family of semiconductor devices that exhibit bi-stable current-voltage characteristics and can be switched between a high-impedance, low-current off state and a low-impedance, high-current on state.
Diacs (57 suppliers)
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
Gate Turn-off (GTO) Thyristors (23 suppliers)
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
Programmable Unijunction Transistors (PUT) (24 suppliers)
Programmable uni-junction transistors (PUT) are three-terminal thyristors that are triggered into conduction when the voltage at the anode exceeds the voltage at the gate. The PUT is similar to the UJT, but its intrinsic standoff ratio can be set by two external resistors. Hence, the term "programmable" is used.
Search by Specification | Learn more about Programmable Unijunction Transistors (PUT)
Quadracs (11 suppliers)
Sidacs (28 suppliers)
Sidacs are bidirectional silicon switches that provide greater power handling capabilities than standard diacs. These four-layer (PNPN) semiconductor devices are triggered by thyristors and act as open circuits that are capable of withstanding a specific rated voltage until triggered.
Search by Specification | Learn more about Sidacs
Silicon Controlled Rectifiers (SCR) (138 suppliers)
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)
Thyristor Surge Suppressors (39 suppliers)
Thyristors (336 suppliers)
Triacs (122 suppliers)
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
Unijunction Transistors (UJT) (21 suppliers)
Unijunction transistors (UJT) are three-terminal devices that exhibit a negative resistance characteristic.
Learn more about Unijunction Transistors (UJT)