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Rotary Switches - MD00L3NCQD Application Field and Working Principle

Rotary switches are widely used in a variety of industries, from consumer electronics to industrial automation. They are used to select a specific path for electrical current or signals, typically in sequence. The MD00L3NCQD rotary switch is a DPDT (double pole, double throw) mini switch, measuring just 14.2mm in diameter and 17.78mm in length. It is rated for 6A at 120VAC and 2A at 250VAC, and is suitable for use in a wide range of applications, from test and measurement equipment to industrial control and automation systems.

The design of the MD00L3NCQD rotary switch means that there are two poles, each pole has two positions, and the motion of the switch is rotational. The switch is rotated around its center and when the switch is in its position corresponding to each pole, it connects the two contacts at that pole. This allows the switch to be used to disconnect or connect two wires. In terms of its working principle, the mechanism of the MD00L3NCQD rotary switch is based on a cam, which is connected to the switch shaft. This cam moves a series of contact arms, which are connected to the contacts on the switch. As the switch is turned, the cam rotates, driving the contact arms to make or break contact.

The MD00L3NCQD rotary switch is composed of three major parts: a case, a stem, and a switch. The stem of the switch is ARMO-molded and includes a stainless steel shaft which is seated in an L-shaped bearing on the case top. Below the case top, there is a molded polyester base which houses the contact arms. The switch consists of a series of contact arms, which are activated by the motion of the cam. The contact arms are connected to the contacts by a linking mechanism, and the contacts are connected to the switch terminals. The contact arms are made of phosphor bronze, while the contacts are made of silver nickel. The contacts and the contact arms are insulated from the case by a silicone gel. The shaft of the switch is sized to fit into standard round mounting holes, making it easy to install into a panel or enclosure.

In summary, the MD00L3NCQD rotary switch is a DPDT mini switch designed for a wide range of applications. The switch is rated for 6A at 120VAC and 2A at 250VAC, and is easy to install in a panel or enclosure. Its mechanism is based on a cam, which drives a series of contact arms to make or break contact. The contacts and contact arms are insulated from the case to ensure efficient operation. With its simple and reliable design, the MD00L3NCQD rotary switch is an ideal choice for a wide range of applications.

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