PS2861-1-F3-K-A

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, a type of electrical isolator, are used to provide electrical isolation of components or systems. They provide a physical barrier between electronic circuits, which prevents the transfer of interference and power. Optoisolators can also be used to protect sensitive circuitry or components from fault conditions. These devices are often used in audio, video, and computer systems, in order to prevent ground loops, reduce noise, prevent loss of data, and provide immunity to electrostatic discharge (ESD). One well-known example of an optoisolator is the PS2861-1-F3-K-A.

The PS2861-1-F3-K-A is a single-channel transistor output photovoltaic optoisolator with a 0.6A output current. It is constructed with a gallium arsenide infrared emitting diode (IRED) and a silicon NPN phototransistor detector. The device has a built-in base-emitter resistor, which provides TTL compatibility. This makes it ideal for a variety of applications, including medical, security, industrial, and automotive equipment.

The working principle behind the PS2861-1-F3-K-A is simple. The optoisolator is designed to sense light emitted from the IRED. When the IRED is illuminated, a small current flows across the phototransistor, which in turn causes the transistor to switch on. This in turn switches on the output transistor, which then provides an output current.

The PS2861-1-F3-K-A can be used in a variety of applications, such as for isolation of control signals in audio and video systems, data and signal isolation in low-level applications, protection against high-voltage in power supplies, isolation of logic signals in digital systems, and isolation of high-voltage switches and circuit breakers. Its 0.6A output current and highly-regulated and reliable switching mechanism make it suitable for any application where electrical isolation is required.

In addition, the PS2861-1-F3-K-A has a very low power consumption, and is protected against ESD, in-rush current and reverse-bias voltage. It is also well-suited for use in applications that require a wide temperature range, and its photonic plastic housing provides excellent protection from in-circuit environmental conditions such as humidity and dust. Therefore, this optoisolator can be used as a reliable, cost-effective isolator for a wide variety of applications.

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