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Optoisolators - Transistor, Photovoltaic Output

The MOC81043SD is a transistor-type optoisolator with photovoltaic output. It is an AC/DC-coupled optical coupler constructed with an infrared LED and completed with a integrated signal amplifier for signal transmission between two independent circuits. The MOC81043SD optoisolator helps prevents high voltage or current spikes from being transmitted from one circuit to the other while maintaining a high level of isolation between the two.

Applications of MOC81043SD

The MOC81043SD optoisolator can be used in a variety of applications. It is commonly found in industrial equipments such as:

• Programmable logic controllers (PLCs)
• Motor controls
• Process controllers
• Power supply systems
• Audio/video equipment
• CNC and robotics equipment
• And much more!

Working Principle of MOC81043SD

The MOC81043SD optoisolator consists of an infrared LED and a phototransistor. The LED transmits a low energy, infrared energy which is then picked up by the phototransistor. This in turn, triggers an electronic short circuit which closes the transistor, allowing current to flow from the collector to the emitter. The current is then amplified by the integrated signal amplifier and sent to the respective output circuit.

In addition, the MOC81043SD optoisolator can be used to monitor the signaling output of other devices such as: alarms, relay switches, and process controllers. The LED and phototransistor duo can be used as a reliable detector, governed by a LED drive circuitry, which makes it ideal for monitoring external signals.

Advantages of MOC81043SD

The MOC81043SD optoisolator provides significant benefits to users:

• Isolation up to 400 Vrms
• Compact SOP-4 package
• Ultra-low power consumption
• High speed data transmission up to 4 Mbps
• High noise immunity
• High quality output

The MOC81043SD optoisolator is a reliable and cost-effective way to ensure a high level of electrical isolation between two circuits while maintaining a high degree of signal integrity and efficiency. Its low power consumption and high immunity from external noise makes it particularly suitable for applications where space is limited and where signal integrity is of paramount importance.

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