C185M

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Thyristors are a class of semiconductor devices with special properties used in various applications. One specific type of thyristor is the Silicon Controlled Rectifier, or SCR. The C185M is a proprietary SCR manufactured by Westinghouse Electric Corporation. It is designed for heavy industrial use, and is commonly used in the oil and gas industry, as well as in electric power transmission and reception.

To understand the C185M’s application field and working principle, it is necessary to first provide a brief overview of thyristors and SCRs. Thyristors are three-terminal semiconductor devices, with one “Anode” terminal, one “Cathode” terminal, and one “Gate” terminal. When a positive voltage is applied to the anode and a negative voltage is applied to the cathode, current will flow between them, provided the gate voltage is positive. The resulting “on” current is then limited by the internal resistance of the device, or the “Dynamic Resistance”.

The C185M employs the same basic principle, but is designed for heavier industrial use. It is rated for a useable current of 1,400 Amps at a 60 Hz cycle frequency, and can handle 1,200 Amps of DC current. It has a very low dynamic resistance of 3.5 ohms and can operate at temperatures ranging from -45deg to 85deg C.

The C185M’s primary application is in the oil and gas industry, where it often serves as a switching device for electric circuit controls. It is also used in electric power transmission and reception, where it acts as a gate device that controls voltage and current in DC circuits.

The primary benefit of using the C185M is its rugged construction. It employs an integrated heat sink that minimizes thermal runaway and ensures a long life, even when operated in tough conditions. The C185M is also UL and CSA approved, indicating its superior safety and reliability.

In terms of working principle, the C185M is similar to other SCRs. When a negative voltage is applied to the anode and a positive voltage is applied to the cathode, current will flow between them provided the gate voltage is positive. Once this occurs, the gate control can be removed and the device will remain in its conduction state until the forward anode-cathode voltage is reduced to zero.

The C185M is an effective and reliable SCR device for heavy industrial use. It has a high current rating, a low dynamic resistance, and a rugged construction that makes it suitable for use in harsh operating conditions. Additionally, it is UL and CSA approved, providing an extra layer of safety and reliability.

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