Omron G3VM-KR Slim SOP 4-Pin MOSFET Relays

Introduction

The Omron Electronics G3VM-KR series consists of compact MOSFET relays designed for reliable solid-state switching in space-constrained electronic systems. These normally open relays combine optical isolation with MOSFET output switching, offering a practical alternative to electromechanical relays for low- to medium-voltage signal and load control.

Part Description

Omron G3VM-KR MOSFET relays are housed in a slim SOP 4-pin surface-mount package, making them suitable for densely populated PCB designs. The devices provide galvanic isolation between the control input and output circuit, rated at 3750 Vrms input-to-output isolation.

The relay output is normally open and uses MOSFET technology rather than physical contacts. This enables quiet switching, fast operation, long service life, and freedom from contact bounce. G3VM-KR relays support load voltages up to 60 V and continuous load currents up to 1 A, while their low ON-resistance helps reduce voltage drop and power dissipation during operation.

Key characteristics include:

• Normally open MOSFET relay output
• Slim SOP 4-pin surface-mount package
• Up to 60 V load voltage capability
• Up to 1 A continuous load current capability
• Low ON-resistance for efficient switching
• 3750 Vrms input-to-output isolation
• Silent, bounce-free solid-state operation
• Compact format for high-density electronics

Applications

Potential applications for the Omron G3VM-KR series include:

• Battery-powered load switching
• Test and measurement equipment
• Data acquisition modules
• Industrial control interfaces
• PLC input and output modules
• Communication equipment
• Security and access-control systems
• Medical monitoring equipment
• Semiconductor test fixtures
• Portable instrumentation
• Audio and signal-routing circuits
• Smart-home controllers

Industries

The G3VM-KR MOSFET relays can be used across a range of industries, including:

• Industrial automation
• Test and measurement
• Medical electronics
• Telecommunications
• Consumer electronics
• Building automation
• Energy management
• Security systems
• Automotive auxiliary electronics
• Laboratory and scientific instrumentation

Usage Ideas

1. Isolated Sensor Output Module
   Use a G3VM-KR relay to switch a 24 V sensor or actuator line from a low-voltage microcontroller output while maintaining isolation between the logic and field-side circuitry.

2. Automated Test Fixture
   Integrate several relays into a compact test board to selectively connect power rails, signal paths, or measurement points during automated product testing.

3. Battery Load Disconnect Circuit
   Build a low-profile battery-management board that uses the relay to connect or disconnect a DC load under microcontroller supervision, helping conserve power during standby operation.

Conclusion

The Omron G3VM-KR Slim SOP 4-Pin MOSFET relay series provides compact, isolated, and efficient solid-state switching for loads up to 60 V and 1 A. With low ON-resistance, a normally open output, and 3750 Vrms isolation, these relays are well suited to space-sensitive control, measurement, switching, and interface applications where long-term reliability and silent operation are important.