The Omron G3PE-245B-3N, also cataloged as the G3PE 3-Phase Heater Control, operates as a dedicated hardware component for high-frequency solid-state load switching within 3-phase thermal processing loops. Driven by a 12 to 24 VDC control input, the phototriac-isolated power circuit features an integrated zero-cross function to switch 100 to 240 VAC AC loads up to 45 A per phase without contact wear or inductive noise generation.

Part Number Breakdown & Configuration Matrix

• G3PE: Industrial compact solid-state contactor platform for heater control applications
• 245: Rated output load voltage handling up to 240 VAC with a continuous load current rating of 45 A
• B: Built-in zero-cross function designed to minimize inrush current and line surge generation
• 3N: Three-phase output switching configuration with three controlled poles and neutral/line screw terminal landing

Physical & Electrical Specifications

PLC Pulse-Width Modulation and Backplane Integration

The unit accepts direct low-power discrete transistor outputs from PLC pulse-width modulation (PWM) modules or temperature controllers without interposition relays. By executing rapid, bounce-free switching cycles, it matches high-speed backplane bus communication velocity Licences across centralized PLC control racks. Deterministic zero-cross firing maintains precise thermal regulation over Profinet / EtherNet/IP networks while preventing backplane noise reflection.

Package Inventory

• 1 x Omron G3PE-245B-3N 3-phase heater control solid-state relay unit
• 1 x Integrated heatsink mounting assembly
• 1 x Technical instruction sheet

Electrical Wiring and Physical Mounting Guidelines

Heatsink Orientation and Clearance

• Mount the unit vertically on a metallic panel surface to ensure unhindered vertical airflow through the integrated heatsink fins.
• Maintain a minimum clearance of 80 mm above and below the heatsink assembly to facilitate natural convection cooling.

Terminal Landing and Surge Protection

• Torque all power screw terminals to specified engineering limits to avoid resistive heating at high current conduction points.
• Install fast-acting semiconductor fuses upstream to match the 1260 A2s I2t limit and protect phototriac output stages from short-circuit faults.

Technical Inquiry Solutions

• What input voltage limits trigger reliable conduction across the input stage?

  The input circuit turns on at 9.6 VDC maximum and fully turns off when the control voltage drops below 1 VDC.

• How does the zero-cross function suppress electrical noise during power switching?

  The phototriac circuit energizes output thyristors only when the AC load voltage passes near zero volts, suppressing surge spikes.

• Is hot-plugging power leads permitted while the 3-phase load bus is live?

  No, disconnecting active 45 A AC load leads under voltage causes severe arc discharge and damages terminal hardware.

• What maximum peak surge current can the output stage endure during fault conditions?

  The power output section withstands a non-repetitive inrush surge current of up to 440 A for 1 full cycle at 60 Hz.

• Are external interposition relays required between a 24 VDC PLC output card and the input terminals?

  No, the input draws a maximum of 10 mA at 24 VDC, allowing direct connection to standard PLC transistor output channels.

• What total heater load capacity can this controller handle in a 200 VAC 3-phase system?

  The unit supports 3-phase resistive heater loads rated up to 15.5 kW when operating at 200 VAC.

• How does phototriac isolation protect control electronics from line transients?

  Optical coupling completely separates low-voltage DC control signals from high-voltage 240 VAC load circuits to block transient spikes.

• What precautions prevent overheating under continuous 45 A maximum load current?

  Ensure vertical mounting on a flat panel, maintain unobstructed ambient airflow, and verify ambient temperatures remain within limits.