Typ Max Unit. Z th j-mb. Fig 6. All rights are reserved. Reproduction in whole or in part is prohibited without the prior. The information presented in this document does. No liability will be accepted by the publisher for any. Publication thereof does not convey nor imply any license under. Order Number. Lead Free. Halogen Free. G: GATE. Pin Assignment. United States. Trend Analysis. Datasheets : BT Series C. Share this post. How is the BT unidirectional thyristor pin distribution?
Face the BT literally toward you, with the pins facing downwards. The first pin on the left is the trigger pole, the middle pin is the anode, which is connected to the heat sink, and the right pin is the cathode. What type of transistor can be used instead of BT? Use the universal meter to measure whether the gate and cathode are short-circuited.
The low-power thyristor is measured with the resistance profile of a universal meter. The two poles that do not work in the forward and reverse directions are the A and K poles, and the remaining pin is the G pin.
At this time, the A and K poles are blocked, except for the resistance when touching the G pole. In addition to the on-state, if the G pole is disconnected and the on-state can still be maintained it has been triggered , the thyristor is good.
WS vs. WSB Tessie Subscribe to Utmel! Account Center 0 Items Opps. It's empty. Part Number. A basic dimming circuit for controlling the brightness of a lamp is shown in the diagram below. The 10K variable resistor and 1uF capacitor operate as an RC time delay, allowing the load to regulate how much of one AC half cycle is seen.
As a result, the SCR serves as an effective power controller. Thyristors can switch low voltage low current devices as well as extremely large currents at mains line voltages, and they can regulate AC or DC loads.
The image above shows a simple example of a thyristor managing a DC load, such as a small DC motor. A BT thyristor is used to link the motor to a 12V DC supply, however, it will not run until the thyristor is made to conduct.
This is accomplished by briefly shutting the start switch, which sends a pulse of current to the thyristor's gate terminal. The motor now runs as soon as the thyristor is turned on, and its resistance has plummeted.
There is no gate current when the start switch returns to its normally open state, but the thyristor continues to conduct, and in a DC circuit, the current continues to flow and the motor continues to drive.
Any subsequent operations on the start switch are now ineffective. Only if the current flow falls below the thyristor's holding current threshold will the thyristor turn off. This is accomplished by briefly shutting the stop switch, which shorts out the thyristor. Because the SCR current is now less than the holding current value, the circuit current now passes through the stop switch rather than the thyristor, which turns off instantly.
A normally closed switch in series with the thyristor may also be used to stop the motor. When pressed, the normally closed switch would also momentarily stop current flow through the thyristor, allowing the thyristor to turn off. WeEn Semiconductors Co. It was created in January and is registered in Nanchang, China. WeEn is committed to providing a broad range of innovative bipolar power products based on their cutting-edge bipolar power technology.
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