Optocouplers / Semiconductors

Discover high-performance optocouplers and semiconductor relays at Murrelektronik – ideal for reliable signal isolation and interference-free automation. ✓ Long service life ✓ Maintenance-free ✓ Optimized for modern control cabinets

Related searches: solid state relays, isolation amplifiers, signal converters, 24V optocoupler, semiconductor interface modules

Optocouplers for Safe Signal Transmission and Galvanic Isolation

Optocouplers, also known as photocouplers or optical isolators, are vital components in automation systems that require reliable signal transfer without physical contact. By transmitting signals via light – typically using an LED and a phototransistor – they ensure safe galvanic isolation between input and output. This prevents electrical interference and eliminates mechanical wear, resulting in exceptionally long operational lifespans.

Efficient and Durable: Semiconductor Relays and Isolation Modules

Unlike mechanical relays, semiconductor-based modules such as solid state relays (SSR) or TRIAC-based devices are designed for wear-free switching. These devices are particularly suitable for high-speed, high-frequency switching tasks, especially in control cabinets that demand compact, vibration-resistant solutions. Whether you’re integrating an input/output module or building a PLC system based on the EVA principle (input-processing-output), Murrelektronik’s optocouplers offer unmatched performance.

Types of Optocoupler Technologies

• Semiconductor Optocouplers – Compact and efficient; commonly available for 24 V DC input ranges (20–30 V DC)
• Standard Optocouplers – General-purpose isolation for AC/DC signals; ideal for mixed signal environments
• TRIAC Optocouplers – Perfect for switching AC loads with minimal switching noise and high stability

Available with various input/output voltage configurations, such as 24V or 230V, and offered with connection types including push-in terminals, screw terminals, and plug-in screw terminals – tailored to your installation environment.

Typical Applications of Optocouplers

Optocouplers are commonly used in:

• Galvanic isolation of control and load circuits
• Protection of sensitive PLC or microcontroller inputs
• Signal conversion between analog/digital domains
• Switching regulated power supplies or transformers

Why Choose Murrelektronik Optocouplers?

• Vibration-resistant design with no mechanical wear
• Available for AC or DC input/output combinations
• Ideal for high-density control cabinets and mobile systems
• Wide selection of relay and semiconductor isolation solutions
• Compatible with DIN rail mounting

Signal Integrity in Analog and Digital Automation

In analog control circuits, optocouplers eliminate the risk of leakage currents and transient voltage spikes. For digital systems, especially those involving sensitive microelectronics, they prevent common-mode disturbances and voltage surges. This ensures not only higher system stability but also longer equipment lifespans.

Murrelektronik’s optocouplers are widely used in industrial automation, measurement systems, and even in specialized fields like musical electronics, thanks to their fast response and noise-resistant properties.

Looking for robust and efficient optical isolation solutions? Explore Murrelektronik