Professional IC Distribution & Technical Solutions

Part Number: G2R-1-SN DC24V(S)

Manufacturer: OMRON

Specifications:

• Contact Configuration: 1 Form A (SPST-NO)
• Contact Rating:
• 5A @ 250VAC (resistive)
• 5A @ 30VDC (resistive)
• Max. Switching Voltage: 250VAC, 30VDC
• Max. Switching Current: 5A
• Max. Switching Power: 1,250VA (AC), 150W (DC)
• Coil Voltage: 24VDC
• Coil Power Consumption: 0.9W
• Operate Time: ≤15ms
• Release Time: ≤5ms
• Insulation Resistance: 1,000MΩ (min) @ 500VDC
• Dielectric Strength: 2,000VAC (50/60Hz, 1min)
• Mechanical Life: 10,000,000 operations
• Electrical Life: 100,000 operations (rated load)
• Ambient Temperature Range: -40°C to +70°C
• Weight: Approx. 40g

Descriptions:

The OMRON G2R-1-SN DC24V(S) is a compact, high-performance PCB-mount relay with a single-pole, normally open (SPST-NO) contact configuration. It is designed for low-power switching applications in industrial control systems, automation, and electronic devices.

Features:

• High Reliability: Long mechanical and electrical lifespan.
• Low Power Consumption: Energy-efficient 24VDC coil.
• Compact Design: Space-saving PCB-mount construction.
• Wide Voltage Range: Suitable for both AC and DC loads.
• High Insulation: Ensures safety in high-voltage applications.
• Gold-Plated Contacts: Improves conductivity and durability.

This relay is ideal for use in control panels, power supplies, and automation systems requiring dependable switching performance.

# Technical Analysis of OMRON G2R-1-SN DC24V(S) Relay

## 1. Practical Application Scenarios

The OMRON G2R-1-SN DC24V(S) is a compact, single-pole power relay designed for industrial and commercial control applications. Its 24V DC coil voltage makes it suitable for low-power control circuits, while its robust contact design supports high-current switching.

Industrial Automation

The relay is commonly used in PLC (Programmable Logic Controller) output modules to switch motors, solenoids, and actuators. Its 10A switching capacity at 250V AC allows it to handle moderate loads in conveyor systems, packaging machines, and assembly lines.

HVAC Systems

In heating, ventilation, and air conditioning (HVAC) units, the G2R-1-SN DC24V(S) controls compressors, fans, and damper actuators. Its sealed construction (SPST-NO) prevents dust and moisture ingress, ensuring reliability in harsh environments.

Energy Management Systems

The relay is employed in smart energy distribution panels to switch between power sources (e.g., grid and backup generators). Its low power consumption (typically 0.9W) minimizes energy loss in control circuits.

Test and Measurement Equipment

Due to its fast response time (~15ms operate, ~5ms release), the relay is used in automated test systems for signal routing and load switching.

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

Inadequate Contact Rating Selection

Pitfall: Overloading contacts beyond their rated 10A/250V AC can lead to premature failure.

Solution: Verify load characteristics (inrush current, inductive/capacitive nature) and derate if necessary. Use snubber circuits for inductive loads.

Improper Coil Voltage Supply

Pitfall: Applying incorrect voltage (e.g., 24V AC instead of DC) may cause erratic operation or coil burnout.

Solution: Ensure power supply matches the relay’s DC24V rating (±10% tolerance). Implement reverse polarity protection if needed.

Thermal Management Issues

Pitfall: High ambient temperatures (>70°C) reduce relay lifespan.

Solution: Allow sufficient spacing between relays, avoid enclosed spaces without ventilation, and monitor operating temperature.

Mechanical Stress on Terminals

Pitfall: Excessive bending force during wiring can damage solder or screw terminals.

Solution: Follow OMRON’s torque specifications (0.5 N·m max) and use strain relief for cables.

## 3. Key Technical Considerations for Implementation

Electrical Ratings

• Coil Voltage: 24V DC (±10%)
• Contact Rating: 10A at 250V AC (resistive), 5A at 250V AC (inductive)
• Operate Time: ≤15ms
• Release Time: ≤5ms

Environmental Suitability

• Operating Temperature: -40°C to +70°C
• Vibration Resistance: 10–55 Hz, 1.5 mm amplitude
• Protection Class: Sealed construction (equivalent to IP40)