Würth Elektronik WL-OCHS High-Speed Optocouplers

Introduction

Würth Elektronik WL-OCHS high-speed optocouplers are optoelectronic isolation components designed to transfer digital signals between electrically separate circuits. They provide dependable galvanic isolation while supporting fast signal transmission for control, communication, and industrial electronics applications.

Part Description

The WL-OCHS family consists of high-speed optocouplers that use an optical link to transmit a signal across an isolation barrier. This arrangement helps protect low-voltage logic circuits from high-voltage domains, ground-potential differences, electrical noise, and transient events.

Depending on the selected device, WL-OCHS optocouplers support data rates from 1 MBd to 10 MBd. Their switching times range from approximately 20 ns to 800 ns, allowing designers to select a device appropriate for either fast digital interfaces or less demanding isolated control signals.

The family is available with isolation voltage ratings of 3750 VRMS or 5000 VRMS. These ratings make the devices suitable for designs requiring reinforced separation between control electronics and mains-connected, high-energy, or noisy circuitry.

Key characteristics include:

• High-speed digital signal isolation
• Data rates from 1 MBd to 10 MBd
• Switching times from 20 ns to 800 ns
• Isolation ratings of 3750 VRMS or 5000 VRMS
• Galvanic isolation between input and output circuits
• Suitability for noise-sensitive and high-voltage electronic systems

Applications

Potential applications for WL-OCHS high-speed optocouplers include:

• Isolated digital input and output interfaces
• PLC and industrial controller I/O modules
• Microcontroller-to-power-stage signal isolation
• Switch-mode power supply feedback and control circuits
• Motor drive control interfaces
• Inverter and converter gate-control signal paths
• Isolated UART, SPI, and other digital communication links
• Battery management system communication and protection circuits
• Relay and contactor control systems
• Smart-metering and energy-monitoring equipment
• Factory automation networks
• High-voltage test and measurement equipment

Industries

WL-OCHS optocouplers can be used across a range of industries, including:

• Industrial automation
• Renewable energy
• Power conversion and energy storage
• Automotive electronics
• Transportation and rail systems
• Building automation
• Telecommunications infrastructure
• Medical electronics
• Test and measurement
• Consumer appliances
• Smart energy and utility metering
• Robotics and motion control

Usage Ideas

1. Isolated Motor Controller Interface
   Use a WL-OCHS optocoupler between a microcontroller and a motor-drive power stage to isolate control signals from high-voltage switching noise.

2. PLC Digital Input Module
   Create an industrial digital input board that uses optocouplers to safely detect field-level signals while protecting the low-voltage controller electronics.

3. Isolated Serial Communication Link
   Build a galvanically isolated UART interface for communication between two systems that operate from separate power supplies or have different ground references.

Conclusion

Würth Elektronik WL-OCHS high-speed optocouplers provide a practical solution for fast, isolated digital signal transfer. With data-rate options up to 10 MBd, switching times as low as 20 ns, and isolation ratings up to 5000 VRMS, the family is well suited to industrial, power, automation, and high-voltage electronic designs where safety, noise immunity, and signal integrity are important.