Professional IC Distribution & Technical Solutions

The G2R-2-SNI DC24(S) is a relay manufactured by OMRON. Below are its specifications, descriptions, and features:

Specifications:

• Model: G2R-2-SNI DC24(S)
• Type: Plug-in Power Relay
• Contact Configuration: 2 Form C (DPDT – Double Pole Double Throw)
• Contact Rating:
• Resistive Load: 5A @ 250V AC, 5A @ 30V DC
• Inductive Load: 2A @ 250V AC, 2A @ 30V DC
• Coil Voltage: 24V DC
• Coil Power Consumption: 0.9W
• Operate Time: ≤15ms
• Release Time: ≤5ms
• Electrical Life: 100,000 operations (minimum)
• Mechanical Life: 10,000,000 operations (minimum)
• Insulation Resistance: 1,000MΩ (at 500V DC)
• Dielectric Strength: 2,000V AC (50/60Hz for 1 minute)
• Ambient Temperature Range: -40°C to +70°C
• Vibration Resistance: 10–55Hz, 1.5mm double amplitude
• Shock Resistance: 100m/s²
• Weight: Approx. 35g

Descriptions:

• The G2R-2-SNI DC24(S) is a compact, high-performance relay designed for industrial control applications.
• It features a solderless terminal design for easy installation and maintenance.
• The relay is equipped with silver alloy contacts for reliable switching performance.
• It has a dust cover (SNI) to protect against contaminants.

Features:

• High Switching Capacity: Suitable for both AC and DC loads.
• Long Electrical & Mechanical Life: Ensures durability in demanding environments.
• Compact Design: Saves space in control panels.
• Solderless Terminals: Facilitates quick and secure wiring.
• Dust Cover (SNI): Enhances protection in harsh conditions.
• Compliance with Safety Standards: Meets international safety and performance standards.

This relay is commonly used in automation, power control, and industrial machinery applications.

# Technical Analysis of OMRON G2R-2-SNI DC24(S) Relay

## 1. Practical Application Scenarios

The OMRON G2R-2-SNI DC24(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 simultaneous control of multiple circuits.
• HVAC Systems: Employed in heating, ventilation, and air conditioning units to manage compressor and fan operations due to its robust contact rating (up to 5A at 250VAC).
• Power Distribution: Integrated into relay modules for load switching in power supply units, ensuring safe isolation between control and load circuits.
• Test and Measurement Equipment: Provides precise switching in automated test setups where repeatability and low contact resistance are critical.

The relay’s sealed construction (SNI variant) enhances resistance to dust and moisture, making it suitable for harsh environments.

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

Pitfall 1: Incorrect Load Matching

Issue: Overloading contacts beyond rated capacity (e.g., inductive loads causing arcing).

Solution: Verify load type (resistive, inductive, capacitive) and ensure current/voltage ratings align with G2R-2-SNI specifications. Use snubber circuits for inductive loads.

Pitfall 2: Poor PCB Layout

Issue: High-voltage traces routed near low-voltage control signals, leading to noise or cross-talk.

Solution: Maintain adequate creepage/clearance distances and separate high/low-voltage sections. Use ground planes for noise suppression.

Pitfall 3: Inadequate Heat Dissipation

Issue: Sustained high-current operation causing thermal stress.

Solution: Ensure proper ventilation or heatsinking if operating near maximum ratings. Derate current in high-temperature environments.

Pitfall 4: Ignoring Coil Voltage Tolerance

Issue: Unstable operation due to voltage fluctuations in the 24VDC coil supply.

Solution: Implement a regulated power supply with ±10% tolerance and transient protection (e.g., TVS diodes).

## 3. Key Technical Considerations for Implementation

• Contact Material: AgSnO₂ contacts offer superior arc resistance for inductive loads compared to standard Ag alloys.
• Switching Speed: Fast operate/release times (~15ms) ensure minimal delay in control applications.
• Insulation Resistance: >1,000MΩ at 500VDC ensures reliable isolation between poles.
• Mechanical Endurance: 10 million operations guarantee long-term reliability in frequent switching scenarios.

For optimal performance, adhere to OMRON’s datasheet guidelines on mounting orientation, terminal torque, and environmental limits (e.g., -40°C to +70°C).