Omron G3PE-235B-3N G3PE Series 3-Phase Solid State Relay

Description

Designed for high-frequency switching of industrial heating elements, the Omron G3PE-235B-3N provides robust 3-phase solid-state control with integrated zero-cross functionality. This solid-state contactor operates with a control input of 12 to 24 VDC and is engineered to switch rated loads up to 240 VAC at an output current of 35 A (at 40 degC ambient temperature). Utilizing phototriac isolation, the device isolates the low-voltage control circuitry from high-voltage transients on the load side, delivering highly reliable thermal management in demanding environments.

Features

• Integrated heat sink optimizes thermal dissipation, maintaining performance at elevated ambient temperatures.
• Built-in zero-cross circuit minimizes electromagnetic interference (EMI) and electrical noise during switching transitions.
• Phototriac isolation provides 100% galvanic separation between input and output channels.
• Screw terminal construction ensures secure, vibration-resistant terminations for high-current wiring.
• DIN-rail and panel mounting configurations allow for flexible cabinet integration.

Applications

• Industrial reflow ovens and packaging machinery heat-sealing bars.
• Semiconductor manufacturing chamber and deposition heater controls.
• Plastics extrusion, injection molding, and thermoforming equipment.
• Environmental testing chambers and industrial climate control systems.

Technical Specifications

Connections and Interfaces

Empirical Engineering Insights

Alternative Models & Compatibility

The "3N" suffix specifies a model with a built-in heat sink and a 3-phase configuration without a built-in varistor. It directly replaces legacy G3PE configurations that match the 35 A current profile, but panel space requirements must be verified due to the integrated cooling profile. When migrating from 2-phase control systems (such as the G3PE-235B-2N) to 3-phase, ensure that your control PLC program and safety interlocks account for the switching of all three phases to optimize line balance and eliminate floating neutral potentials on delta-connected loads.

Application Pitfalls & Engineering Notes

Thermal derating is the primary failure vector in enclosed industrial cabinets. The 35 A rating is calculated at an ambient temperature of 40 degC or lower. If the internal panel ambient temperature rises to 60 degC, the maximum continuous load current must be derated by approximately 40%. Ensure a minimum vertical clearance of 80 mm and a horizontal clearance of 30 mm between the G3PE-235B-3N and surrounding hardware to maintain convection airflow through the heat sink fins.

Commissioning & Wiring Tips

To prevent localized high resistance and terminal charring, power terminals must be torqued precisely to 1.47 to 1.96 N-m using M5 terminal screws. Do not use tinned wire ends in screw clamp terminals; crimped pin terminals or ring lugs are highly recommended. If switching inductive heating elements rather than purely resistive loads, verify that the load inrush peak remains well within the 440 A (at 60 Hz) non-repetitive rating to prevent internal phototriac degradation.

Installation Guidelines