Omron G3PE-245B-3N G3PE Series 3-Phase Solid State Relay

Description

Providing precise, low-noise thermal regulation in demanding industrial environments, the Omron G3PE-245B-3N acts as a heavy-duty three-phase solid-state contactor engineered for high-frequency heater switching. Designed with a built-in heat sink and integrating advanced phototriac isolation, this device ensures safe galvanic separation between the control logic and high-power load circuits. The integrated zero-cross function suppresses electromagnetic interference by synchronizing load activation with the AC voltage zero points, making it highly compatible with noise-sensitive automation environments.

Features

• Three-Phase Control: Equipped with 3 switched poles (3-element configuration) for comprehensive load isolation.
• Zero-Cross Switching: Minimizes electrical noise and surge currents during initial power-up states.
• Robust Isolation: High-performance phototriac coupler protects PLC/controller outputs from load-side transients.
• Physical Durability: Solid-state construction eliminates mechanical wear, dramatically extending operational lifetimes compared to traditional electromagnetic contactors.
• Convenient Terminal Layout: Heavy-duty screw terminals support secure ring and fork crimp connections.

Applications

• Plastic injection molding and extrusion barrel heating
• Industrial reflow ovens and industrial drying systems
• Semiconductor manufacturing thermal chamber controllers
• Packaging machinery shrink tunnels and sealing bars

Technical Specifications

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

The "3N" suffix denotes a 3-phase, 3-element controller which switches all three distinct phases. If replacing older 2-element models (such as the G3PE-245B-3, which only switches two phases while passing the third directly), verify panel wiring diagrams. The 3-element version provides superior isolation and meets stricter safety codes requiring all phase lines to be interrupted during off-cycles.

Application Pitfalls & Engineering Notes

Solid state relays generate approximately 1.5 Watts of heat per Ampere of load current. When installing this 45 A unit in fully enclosed control panels, calculate total thermal load and ensure adequate air circulation or force-cooling. Ambient temperature inside the panel must not exceed 40 degC to maintain the full 45 A rating without derating the device.

Commissioning & Wiring Tips

To prevent localized overheating and terminal failure under high current loads, use crimp-style closed-loop ring terminals for the main load lines (L1/L2/L3 and T1/T2/T3). Ensure all load terminals are tightened to a torque rating between 1.47 and 2.45 N-m. Periodically inspect connection torque during routine plant maintenance cycles.

Installation Guidelines