L2004D5RP

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Thyristors - TRIACs

Thyristors are a type of semiconductor device, usually constructed out of three or more layers of thin, crystalline material. They are typically used in power electronic equipment, such as rectifiers, inverters, and choppers in order to control the flow of current. A TRIAC is a type of thyristor, differentiated by its ability to control both the positive and negative portion of an alternating current waveform. The L2004D5RP is a specific type of TRIAC, and its application field and working principle is discussed in the following.

The L2004D5RP is a two-terminal, four quadrant TRIAC-type silicon controlled rectifier (SCR) with a rating of 25 Amps, 600 Volts, and VTO of 2.5 volts. It is designed for applications in the high power switching, inverter, rectifier, and static switch power supply markets. Its features include a bidirectional operation, fast switching, high commutation capability and the ability to be triggered with both gate positive and negative triggering.

The working principle of the L2004D5RP is based on the action of the gate, when triggered, creates a conductive path between the two main terminals. When current is applied to the gate, the SCR switches on, allowing current to flow from anode to cathode. The two main terminals can be controlled by both gate positive and negative triggering.

When the L2004D5RP is operating, it acts as a semiconductor switch, allowing electrical current to pass from one terminal to the other. The two main terminals of the SCR are the anode (A) and cathode (C). The gate (G) controls the conduction of the SCR and is the input for the switching action. Depending on the polarity of the gate current, the switch will either be forward biased (A-G-C) or reverse biased (C-G-A). In forward biased mode, the SCR will be on and will allow current to pass from the anode to the cathode. In reverse biased mode, the SCR will be off and no current will flow. The L2004D5RP is a four quadrant TRIAC, meaning that it provides bi-directional control of current flow; both forward and reverse biasing are possible.

The L2004D5RP is designed to be triggered with either gate positive or negative triggering. When using gate positive triggering, a positive voltage must be applied to the gate in order to turn on the SCR. Gate negative triggering requires a negative voltage at the gate to turn on the SCR. When the gate voltage is removed, the SCR will be turned off, regardless of polarity.

In summary, the L2004D5RP is a two-terminal TRIAC-type silicon controlled rectifier rated for 25 Amps and 600 Volts. It is designed for power switching applications such as rectifiers, inverters, and choppers. Its features include bidirectional operation, fast switching, and high commutation capability. It can be triggered with both gate positive and negative triggering. The L2004D5RP is a reliable, efficient, and well-designed TRIAC.

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