Professional IC Distribution & Technical Solutions

G2R-2-SN DC24V(S) Relay Specifications (Manufacturer: OMRON)

#### Descriptions:

• Model: G2R-2-SN DC24V(S)
• Type: PCB-mount power relay
• Contact Configuration: 2 Form C (DPDT – Double Pole Double Throw)
• Coil Voltage: 24V DC
• Contact Material: Ag alloy (Silver alloy)
• Sealed Type: Sealed construction for improved reliability

#### Features:

• High Switching Capacity: Suitable for various industrial applications
• Compact Design: Space-saving PCB mounting
• High Insulation: Ensures safety and durability
• Low Power Consumption: Energy-efficient operation
• Reliable Performance: Long electrical and mechanical life

#### Electrical Ratings:

• Contact Ratings:
• Max. Switching Voltage: 250V AC/30V DC
• Max. Switching Current: 5A
• Max. Switching Power: 1,250VA (AC), 150W (DC)
• Coil Specifications:
• Rated Voltage: 24V DC
• Power Consumption: ~0.9W
• Operate Time: ≤15ms
• Release Time: ≤5ms

#### Mechanical & Environmental Specifications:

• Contact Resistance: ≤100mΩ (initial)
• Insulation Resistance: ≥1,000MΩ (at 500V DC)
• Dielectric Strength: 2,000V AC (50/60Hz for 1 min)
• Operating Temperature: -40°C to +70°C
• Vibration Resistance: 10–55Hz, 1.5mm amplitude
• Shock Resistance: 1,000m/s²

#### Applications:

• Industrial control systems
• Automation equipment
• Power supply switching
• HVAC systems
• Test and measurement devices

This relay is designed for reliable switching in demanding environments. For detailed installation and usage guidelines, refer to the official OMRON datasheet.

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

## 1. Practical Application Scenarios

The OMRON G2R-2-SN DC24V(S) is a high-performance power relay designed for industrial and commercial applications requiring reliable switching under moderate loads. Key use cases include:

• Industrial Automation: Used in control panels for switching motors, solenoids, and actuators in PLC-based systems. Its 2-pole configuration allows dual-circuit control, enhancing system redundancy.
• HVAC Systems: Employed in heating, ventilation, and air conditioning units to manage compressor and fan circuits due to its 10A switching capacity at 250VAC.
• Power Distribution: Integrates into relay-based power distribution modules, ensuring safe isolation between control and load circuits.
• Test and Measurement Equipment: Provides precise switching in automated test setups where low-contact resistance (<50mΩ) minimizes signal interference.

The relay’s sealed construction (S variant) makes it suitable for environments with dust, moisture, or chemical exposure, such as food processing or outdoor installations.

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

Pitfall 1: Incorrect Load Matching

Issue: Overloading contacts beyond 10A resistive or 5A inductive can cause premature wear or welding.

Solution: Verify load type (resistive/inductive) and derate current ratings per OMRON’s guidelines. Use snubber circuits for inductive loads.

Pitfall 2: Poor PCB Layout

Issue: High-current traces placed near sensitive signals induce noise or voltage drops.

Solution: Maintain adequate trace width (≥2mm for 10A) and separate high/low-power sections. Use star grounding.

Pitfall 3: Inadequate Coil Drive

Issue: Undervoltage (<80% of 24V) leads to chattering; overvoltage (>110%) risks coil burnout.

Solution: Implement a regulated 24VDC supply with transient protection (e.g., TVS diodes).

Pitfall 4: Thermal Management Neglect

Issue: High ambient temperatures (>85°C) degrade relay lifespan.

Solution: Ensure proper ventilation or derate operational current in elevated temperatures.

## 3. Key Technical Considerations for Implementation

• Contact Material: AgSnO₂ contacts offer superior arc resistance for inductive loads compared to standard AgNi.
• Switching Speed: 10ms operate/release time necessitates timing adjustments in fast-cycling applications.
• Insulation Resistance: >1,000MΩ at 500VDC ensures compliance with safety standards (UL, EN).
• Mechanical Life: 10 million operations (no load) guarantees long-term reliability in frequent-switching roles.

For optimal performance, adhere to OMRON’s datasheet specifications and validate prototypes under real-world operating conditions.