4N27FVM

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The 4N27FVM is an optically-coupled isolator consisting of a GaAlAs infrared LED and an NPN phototransistor. These components are housed in a standard 4 pin dual-in-line package. This isolator is optimized for extremely wide-temperature range of operation (up to +150°C).

Optically-coupled isolators provide electrical isolation up to 5kV between input and output sections and are used to help protect sensitive control electronics in a wide variety of products and systems. They are used to block high surges, protect against electromagnetic interference (EMI), and provide electrical and optical electrical isolation. In industrial electronics, for instance, they are used to isolate input control signals from output power signals while allowing the signals to pass through. Optically-coupled isolators such as the 4N27FVM are available for both digital and analog signals, and are used in a variety of applications, including motor control, process control, medical equipment, measurement & instrumentation.

The 4N27FVM isolator provides 5kV isolation between the input and output sections and features a wide-temperature range of operation (-60°C to +150°C) and a minimum CTR (Current Transfer Ratio) of 200%. The fast response time and low-capacitance of the 4N27FVM makes it ideal for high-frequency applications. It also features low power consumption and is compliant with EN61800-5-1.

The working principle of the 4N27FVM is based on a three-terminal infrared LED with a phototransistor output. The LED is connected to the input source and emits infrared light upon receiving a signal. The phototransistor is connected to the output circuit, and when the LED emits the infrared light, it causes electrons to be released in the phototransistor, resulting in current flow and a complete electrical signal. As the light source is optically isolated from the output circuit, this ensures that any electrical noise or interference is blocked.

The 4N27FVM optically-coupled isolator is widely used in a number of industrial, medical, and automotive applications due to its high electrical isolation and fast response time. It is used in motor control systems for speed and position sensing, as well as for the control of servo motors and variable speed drives. In process control systems, it is used for the surveillance of control systems, as well as for controlling valves and measurement equipment. In medical equipment, it is used for the interconnection of medical scanners, and in automotive applications, it is used for supervising and monitoring communication and speed control systems.

In conclusion, the 4N27FVM optically-coupled isolator is an ideal solution for a wide range of industrial, medical, and automotive applications. Its wide-temperature range and fast response time makes it ideal for high-frequency applications, and its low-capacitance and low power consumption features ensure that it is compliant with EN61800-5-1. Thanks to its high electrical isolation and fast response time, the 4N27FVM is an excellent choice for isolated signal transmission.

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