Omron G3PB-225B-VD Solid State Relay: Complete Technical Guide for Industrial Automation
Omron G3PB-225B-VD Solid State Relay
Professional Grade Solid State Contactor for Industrial Automation Systems
The Omron G3PB-225B-VD represents the pinnacle of solid state relay technology, designed specifically for demanding industrial applications requiring high reliability, fast switching, and minimal maintenance.
View Product Details & PricingProduct Overview
The G3PB-225B-VD is a high-performance solid state relay from Omron's renowned G3PB series, engineered for industrial automation applications. This 25A rated relay features zero-cross switching technology and operates with a 12-24VDC control voltage, making it ideal for PLC control systems and industrial machinery.
Technical Specifications
| Parameter | Specification | Details |
|---|---|---|
| Model Number | G3PB-225B-VD | Omron Solid State Relay |
| Load Current Rating | 25A | Maximum continuous load current |
| Load Voltage Rating | 100-240VAC | Operating range: 75-264VAC |
| Control Voltage | 12-24VDC | Input range: 9.6-30VDC |
| Input Current | 10mA | Typical control input current |
| Output Type | AC, Zero Cross | Zero-cross switching for reduced EMI |
| Termination Style | Screw Terminal | Industrial-grade screw connections |
| Switching Speed | Microsecond range | Faster than mechanical relays |
| Operating Temperature | -30°C to +80°C | Wide temperature range for industrial use |
For complete technical specifications and detailed ordering information, visit the official product page.
Key Features & Benefits
Zero-Cross Switching Technology
The G3PB-225B-VD features zero-cross switching, which minimizes electromagnetic interference (EMI) and reduces stress on connected equipment. This technology ensures switching occurs when the AC voltage crosses zero, preventing voltage spikes and extending equipment lifespan.
High Reliability & Longevity
As a solid state relay, the G3PB-225B-VD has no moving parts or contacts that can wear out. This results in significantly longer operational life compared to mechanical relays, with typical lifespans exceeding 100 million operations.
Fast Switching Speed
With switching speeds in the microsecond range, this SSR provides rapid response times ideal for high-speed industrial applications, PLC control systems, and precision automation equipment.
Energy Efficient Operation
Solid state relays consume less power than electromechanical relays, making the G3PB-225B-VD an energy-efficient choice for continuous operation in industrial environments.
Silent Operation
Unlike mechanical relays that produce audible clicking sounds during operation, the G3PB-225B-VD operates silently, making it suitable for noise-sensitive environments.
Comparison: Solid State vs Mechanical Relays
| Feature | G3PB-225B-VD (SSR) | Mechanical Relay |
|---|---|---|
| Switching Speed | Microseconds | Milliseconds |
| Operational Life | 100+ million cycles | 100,000-1 million cycles |
| Noise Generation | Silent operation | Audible clicking |
| Contact Wear | No moving parts | Contact erosion over time |
| EMI Generation | Minimal (zero-cross) | Significant arcing |
| Power Consumption | Low | Higher coil power |
Industrial Applications
PLC Control Systems
The G3PB-225B-VD is perfectly suited for PLC output modules, providing reliable switching for motors, heaters, solenoids, and other industrial loads. Its 12-24VDC control voltage matches standard PLC output specifications.
Industrial Heating Control
With zero-cross switching and high current capacity, this relay excels in temperature control systems for industrial ovens, furnaces, and process heating applications.
Motor Control
The 25A rating makes the G3PB-225B-VD suitable for controlling single-phase motors in conveyor systems, pumps, and other industrial machinery.
Lighting Control
Ideal for industrial lighting systems where silent operation and long lifespan are critical requirements.
Power Distribution
Suitable for switching power circuits in industrial control panels and distribution systems.
Frequently Asked Questions
The G3PB-225B-VD is a solid state relay with no moving parts, offering faster switching, longer lifespan, silent operation, and reduced EMI compared to mechanical relays. It's ideal for applications requiring high reliability and frequent switching.
Zero-cross switching means the relay only turns on or off when the AC voltage waveform crosses zero volts. This minimizes electrical noise, reduces stress on connected equipment, and prevents voltage spikes that can damage sensitive electronics.
Yes, the 12-24VDC control voltage range is specifically designed for compatibility with standard PLC output modules. The relay can be directly driven by PLC digital outputs without additional interface circuitry.
The G3PB-225B-VD requires proper heat sinking for full load operation. Omron provides specific heat sink recommendations based on ambient temperature and load current. Consult the datasheet or product documentation for detailed thermal requirements.
Solid state relays like the G3PB-225B-VD typically have operational lifespans exceeding 100 million cycles when operated within specified parameters, significantly longer than mechanical relays which typically last 100,000 to 1 million cycles.
No, the G3PB-225B-VD is specifically designed for AC loads only (75-264VAC). For DC load switching, you would need a different model designed for DC operation.
Installation & Wiring Guidelines
Control Circuit Connections
Connect the control voltage (12-24VDC) to the input terminals. The input current requirement is approximately 10mA, making it compatible with most PLC outputs and control circuits.
Load Circuit Connections
Connect the AC load (75-264VAC) to the output terminals. Ensure proper wire sizing for the 25A maximum load current and use appropriate circuit protection (fuses or circuit breakers).
Heat Sink Requirements
For full load operation at 25A, proper heat sinking is essential. Mount the relay on a suitable heat sink using thermal compound to ensure optimal heat dissipation.
Safety Considerations
Always disconnect power before installation. Use appropriate personal protective equipment when working with live circuits. Follow local electrical codes and regulations.
Why Choose Omron G3PB-225B-VD?
Industry-Leading Reliability
Omron is a globally recognized leader in industrial automation components, with decades of experience in relay technology. The G3PB series represents their commitment to quality and reliability.
Comprehensive Technical Support
When you purchase from Koeed.com, you receive access to detailed technical documentation, application support, and warranty coverage.
Cost-Effective Solution
While the initial cost may be higher than mechanical relays, the reduced maintenance, longer lifespan, and energy efficiency of the G3PB-225B-VD provide significant long-term cost savings.
References & Trust Metrics
Industry Recognition: Omron is a Fortune Global 500 company with over 80 years of experience in industrial automation.
Certifications: G3PB series relays comply with international standards including UL, CSA, and CE certifications.
Technical Documentation: Comprehensive datasheets and application notes available from Omron's official documentation.
Customer Reviews: High satisfaction ratings from industrial users across manufacturing, automation, and process control industries.
Source Verification: Specifications verified against Omron official documentation and industry-standard datasheets.
