CTA12-1200SWPT

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TRIACs, or Triode for Alternating Current, are a type of thyristor designed for switching as well as for controlling the amount of current flowing in either direction. Compared to its predecessor, SCR (Silicon Controlled Rectifier), TRIAC has an enhanced reverse blocking capability and is furthermore of unipolar structure. In simpler words, TRIAC is a two-terminal device which behaves like two SCRs connected in inverse parallel with their gate terminals connected.In more details, a typical TRIAC circuit is including a PNPN 4-layer semiconductor containing two SCRs placed back-to-back, forming a diode and an SCR at the same time. Two Gate pins, A1 and A2, of the TRIAC are used to control the on-state and off-state of the TRIAC. In the off-state (non-conductive), after an initial breakdown, the gate current provided to the Gate pins, A1 and A2, is zero and no current flows through the TRIAC. However, when a positive voltage is applied to the Gate pins, A1 and A2, a small current is flowed and the TRIAC enters its on-state, during which it can control the current conduction from terminal 1 to terminal 2.CTA12-1200SWPT is a type of TRIAC which applies to the AC and DC load switching. It is designed as a standard four-layer PNPN diode and designed for medium-power AC power control applications where increases in efficiency, power-handling and reliability are needed. The CTA12-1200SWPT comes with a double fired gate design which can increase the lifetime of the TRIAC and reduce unnecessary current and power loss. Similar to the other Triacs, the Gate-to-MT1 (main-terminal 1) and Gate-to-MT2 (main-terminal 2) must be held at a low voltage below the device\'s Gate trigger voltage, which is typically between 5 Volts and 8 Volts. The device will then enter the on-state when a higher voltage is applied at the Gate-to-MT1 and Gate-to-MT2. By controlling the current applied to the Gate pins, A1 and A2, the amount of current flowing through the CTA12-1200SWPT can be tuned.Most applications of the CTA12-1200SWPT have an application field in AC power switching, including AC and DC motor drive control, household appliance control, such as air conditioning and refrigerator, heater control and light dimmers. Further advantages of the CTA12-1200SWPT include its high surge current, high breakdown voltage and high holding current capabilities boosts its capability of power switching, and these are vital in power electronic applications such as motor driver, UPS, switchgear and traction system applications.Today, the CTA12-1200SWPT has become a reliable option for AC load control and is increasingly popular in the industrial and home electric appliance applications. As the CTA12-1200SWPT comes with a double fired gate design, it has a longer lifetime than the single fired TRIAC with lower leakage current, as well as higher surge ratings than other similar TRIACs. With the advantages over traditional SCR and TRIAC, such as higher controllability and faster switching response, CTA12-1200SWPT has become a powerful choice for modern home and industrial applications.

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