Professional IC Distribution & Technical Solutions

G2R-2-SND DC24V(S) Relay by OMRON

#### Specifications:

• Model: G2R-2-SND DC24V(S)
• Manufacturer: OMRON
• Type: Plug-in Power Relay
• Contact Configuration: 2 Form C (DPDT – Double Pole Double Throw)
• Contact Material: AgSnO₂ (Silver Tin Oxide)
• Contact Rating:
• Resistive Load: 5A at 250V AC / 30V DC
• Inductive Load: 2A at 250V AC / 30V DC
• Coil Voltage: 24V DC
• Coil Power Consumption: 0.9W
• Operate Time: ≤15ms
• Release Time: ≤5ms
• Insulation Resistance: 1,000MΩ min. (at 500V DC)
• Dielectric Strength: 5,000V AC (between coil and contacts)
• Mechanical Life: 10,000,000 operations
• Electrical Life: 100,000 operations (rated load)
• Terminal Type: Plug-in (PCB or socket compatible)
• Operating Temperature Range: -40°C to +70°C
• Weight: Approx. 15g

#### Descriptions:

The G2R-2-SND DC24V(S) is a compact, high-performance plug-in power relay designed for industrial and automation applications. It features a DPDT (2 Form C) contact configuration, allowing it to switch two independent circuits simultaneously. The relay is optimized for 24V DC coil operation and offers reliable switching performance under various load conditions.

#### Features:

• High Reliability: Long mechanical and electrical lifespan.
• Low Power Consumption: Energy-efficient coil design (0.9W).
• Compact Size: Space-saving design for PCB or socket mounting.
• High Dielectric Strength: Ensures safe isolation between coil and contacts.
• Wide Operating Temperature Range: Suitable for harsh environments.
• AgSnO₂ Contacts: Resistant to arc erosion, enhancing durability.
• Compliant with Standards: Meets international safety and performance certifications.

This relay is commonly used in control panels, automation systems, power supplies, and industrial machinery requiring dependable switching.

# Technical Analysis of OMRON G2R-2-SND DC24V(S) Relay

## 1. Practical Application Scenarios

The OMRON G2R-2-SND DC24V(S) is a compact, high-performance power relay designed for industrial and automation applications. Its 24V DC coil voltage and 2-pole configuration make it suitable for:

• Industrial Control Systems: Used in PLC (Programmable Logic Controller) output modules to switch motors, solenoids, and actuators. The relay’s high dielectric strength (2,500V AC) ensures reliable isolation in noisy environments.
• HVAC Systems: Controls compressors, fans, and heating elements due to its 16A switching capacity at 250V AC. The sealed construction (S variant) provides dust and moisture resistance.
• Power Distribution Panels: Facilitates safe switching in low-voltage circuits, often deployed in backup power systems and load management.
• Automotive Testing Equipment: Handles moderate inductive loads, such as relays and contactors, in test rigs where precise switching is required.

The relay’s silver alloy contacts ensure low contact resistance and durability, making it ideal for frequent switching applications.

## 2. Common Design-Phase Pitfalls and Avoidance Strategies

Pitfall 1: Inadequate Load Compatibility

Issue: Mismatching relay specifications with load characteristics (inductive vs. resistive) can lead to premature contact wear or welding.

Solution: Verify load type (AC/DC, inrush current) and ensure the G2R-2-SND’s ratings (16A resistive, 8A inductive at 250V AC) align with application demands.

Pitfall 2: Poor Heat Dissipation

Issue: High ambient temperatures or inadequate ventilation reduce relay lifespan.

Solution: Maintain operating temperatures within the specified range (-40°C to +70°C) and avoid mounting near heat sources. Use heat sinks if necessary.

Pitfall 3: Incorrect Coil Voltage Selection

Issue: Undervoltage may cause chatter, while overvoltage risks coil burnout.

Solution: Ensure stable 24V DC supply (±10% tolerance) with proper filtering to suppress voltage spikes.

Pitfall 4: Lack of Surge Protection

Issue: Inductive loads generate back EMF, damaging contacts.

Solution: Incorporate flyback diodes (for DC loads) or RC snubbers (for AC loads) to suppress voltage transients.

## 3. Key Technical Considerations for Implementation

• Contact Material: Silver alloy ensures low resistance but may require periodic inspection in high-current applications.
• Switching Frequency: The relay supports up to 18,000 operations/hour, but mechanical life (10 million operations) may degrade under high loads.
• Mounting: DIN rail or PCB mounting options offer flexibility; ensure secure fixation to prevent vibration-induced failures.
• Environmental Protection: The (S) variant features sealed construction (IP67 equivalent), suitable for harsh environments.

By addressing these factors, engineers can optimize the G2R-2-SND’s performance and longevity in demanding applications.