The Kingbright KB 817-M is a high-isolation voltage, single-channel transistor optocoupler. This device combines an infrared light-emitting diode (LED) with a high-sensitivity phototransistor in a compact package. It's designed to provide electrical isolation between input and output circuits, protecting sensitive control circuits from voltage spikes, ground loops, and other electrical disturbances.

Applications

• Power Supplies: Isolation in switching power supplies to protect control circuitry.
• Industrial Control: Input/output isolation in PLCs and other industrial control systems.
• Motor Control: Isolation between control signals and high-voltage motor drive circuits.
• Telecommunications: Signal isolation in telecommunication equipment.
• Medical Equipment: Electrical isolation in medical devices to ensure patient safety.

Features

• High Isolation Voltage: Provides a high level of electrical isolation, typically up to 5000 VRMS.
• Compact Package: Space-saving design for high-density circuit board layouts.
• CTR (Current Transfer Ratio): Offers a range of CTR, enabling flexible circuit design.
• Low Input Current: Requires minimal input current for activation, reducing power consumption.
• High Collector-Emitter Voltage: Supports a high collector-emitter voltage, suitable for various applications.
• RoHS Compliant: Meets environmental standards for hazardous substance control.

Benefits

• Enhanced Safety: Provides robust electrical isolation, protecting sensitive circuits and personnel.
• Improved System Reliability: Prevents ground loops and voltage transients from affecting circuit performance.
• Space Saving: Compact package allows for efficient use of board space.
• Design Flexibility: Wide range of CTR options enables customization for specific circuit requirements.
• Environmentally Friendly: RoHS compliance ensures adherence to environmental regulations.

Additional Details

The KB 817-M optocoupler is designed to transfer electrical signals between two isolated circuits by using light. When current flows through the input LED, it emits infrared light, which activates the phototransistor on the output side. The phototransistor then conducts, allowing current to flow through the output circuit. The device is typically housed in a standard DIP-4 package, making it easy to integrate into existing circuit designs. It is often used in applications where electrical noise and high voltages could potentially damage sensitive control circuits.

The KB 817-M is a reliable and versatile optocoupler suitable for a wide range of isolation applications, offering a combination of high performance and safety.