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Optocouplers
Optocouplers, also known as optoisolators or photocouplers, are semiconductor devices that use light to transfer electrical signals between two isolated circuits. They consist of an LED (light-emitting diode) on the input side and a photodetector (such as a phototransistor, photodarlington, or photo-triac) on the output side, all housed in a sin...
Optocouplers, also known as optoisolators or photocouplers, are semiconductor devices that use light to transfer electrical signals between two isolated circuits. They consist of an LED (light-emitting diode) on the input side and a photodetector (such as a phototransistor, photodarlington, or photo-triac) on the output side, all housed in a single package. Key technical parameters include isolation voltage (typically ranging from 2.5 kV to 5 kV or higher), current transfer ratio (CTR), switching speed, and package type (e.g., DIP, SOP, or SMD). These components are essential for breaking ground loops, protecting sensitive electronics from high-voltage transients, and ensuring signal integrity in noisy industrial environments. Common configurations include single-channel, dual-channel, and quad-channel devices, with output types like transistor, Darlington, triac, or logic gate.
Optocouplers are widely deployed in industrial automation, power electronics, and control systems. They are found in programmable logic controllers (PLCs), motor drives, switch-mode power supplies (SMPS), and communication interfaces (e.g., RS-232, RS-485, or I2C). In high-voltage environments, they isolate low-voltage control circuits from high-power sections, such as in variable frequency drives (VFDs) or solid-state relays. They also appear in medical equipment, renewable energy inverters, and automotive electronics, where galvanic isolation is critical for safety and noise immunity.
Our catalog includes subcategories like transistor output optocouplers (e.g., PC817, 4N35), Darlington output optocouplers (e.g., 4N32, TLP127), and triac output optocouplers (e.g., MOC3021, MOC3063). High-speed optocouplers (e.g., 6N137, HCPL-2601) are available for digital communication, while photovoltaic output types (e.g., PVG612) serve in solid-state relay applications. Article codes typically follow manufacturer patterns, such as "PC817" for Sharp or "TLP185" for Toshiba, indicating series and package variants.
Partnering with Electric Automation Network ensures access to genuine optocouplers from top brands like Toshiba, Vishay, and Broadcom. Our engineers provide personalized technical support to help you select the right device based on isolation voltage, CTR, and switching speed. We offer real-time pricing, detailed datasheets, and express worldwide shipping, with discounts up to 65% off list prices. Whether you need standard or high-speed optocouplers, we deliver fast and reliably.
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