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Omron G3NA-450B-UTU-2 DC5-24V Solid State Relay 50A AC200-240V — front view

Omron G3NA-450B-UTU-2 DC5-24V Solid State Relay 50A AC200-240V

SKU: G3NA-450B-UTU-2 DC5-24V

USD 59.00

Omron G3NA-450B-UTU-2 DC5-24V is a 50A solid state relay with DC5-24V control, AC200-240V load switching for high-current industrial heating applications.

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Product Overview

The G3NA-450B-UTU-2 DC5-24V provides a practical interface between controller outputs and field loads. In high-cycle or uptime-sensitive applications, this class of component supports cleaner switching behavior, reduced wear concerns, and easier panel-level standardization.

Controller-to-Load Interface Reliability

Relay/SSR devices isolate control electronics from field-side switching demands and provide a practical interface layer in mixed-load control systems.

High-Cycle Switching Practicality

For frequent switching duty, proper relay/SSR selection improves panel reliability and can reduce maintenance compared with under-rated or mismatched alternatives.

Panel Standardization Benefits

Using consistent relay/SSR classes across equipment simplifies wiring conventions, spare inventory, and technician troubleshooting workflows.

Key Features

  • Load Current: 50A
  • Load Voltage: AC200-240V
  • Control Input: DC5-24V
  • Switching Method: Zero-cross
  • On-State Voltage Drop: 1.6V max
  • Heat Sink: Required (Y92B-N150 or equivalent)
  • SKU: G3NA-450B-UTU-2 DC5-24V
  • Series: G3NA
  • Voltage: 240V
  • I/O: 5 I/O

Best-Fit Applications

  • Isolates controller outputs from field loads
  • Provides reliable switching for control branches
  • Supports higher cycle operation with proper selection
  • Improves panel maintainability and spare planning
  • Reduces unplanned downtime from contact wear issues
  • Enables cleaner wiring architecture in control cabinets

Buying Checklist

  • Practical controller-to-load interface
  • Supports high-duty panel switching
  • Improves reliability with proper sizing
  • Aids standardization of control wiring
  • Strong lifecycle service value

Technical Specifications

Model G3NA-450B-UTU-2 DC5-24V
Series G3NA
Load Current 50A
Load Voltage AC200-240V
Control Input DC5-24V
Switching Method Zero-cross
On-State Voltage Drop 1.6V max
Heat Sink Required (Y92B-N150 or equivalent)
Operating Temperature -30 to +80°C
Mounting Panel mount with heat sink

FAQ for G3NA-450B-UTU-2 DC5-24V

What size heat sink do I need for 50A?
Use Y92B-N150 heat sink for 50A continuous load. For loads above 40A or ambient above 40°C, consider forced air cooling. SSR power dissipation at 50A: 1.6V × 50A = 80W of heat that must be dissipated.
Can I use this for heater control in a furnace?
Yes, G3NA is commonly used for industrial heater control. For furnace applications: ensure adequate heat sinking, add varistor protection, consider zero-cross switching to reduce heater element stress, and implement thermal protection for the SSR itself.
What wire size for 50A load?
Use minimum 6 AWG (16mm²) copper wire for 50A. For runs over 3 meters or high ambient, use 4 AWG (25mm²). Follow local electrical codes and consider temperature rating of wire insulation.
Why choose 50A SSR over contactor?
SSR advantages: silent operation, no contact wear, high-cycle capability (for PWM temperature control), no arcing. Contactor advantages: lower cost, lower heat generation, simpler installation. Choose SSR for precision temperature control, contactor for simple on/off.

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