The Omron G3PE-545B-3N, also cataloged as the G3PE Solid State Contactor, operates as a dedicated hardware component for solid-state heater load switching within industrial temperature control circuits.

Part Number Code Structure

• G3PE: Industrial Three-Phase Solid State Contactor Series

• 5: 480 VAC Operating Voltage Rating

• 45: 45 A Load Current Capacity

• B: Built-in Heat Sink Assembly Included

• 3N: Three-Pole Configuration with Zero Cross Function

Technical Specifications Summary

Deterministic Industrial Logic & Bus Synchronization

The unit handles low-latency control logic triggering without introducing electrical harmonic interference into PLC I/O backplanes or local EtherNet/IP networks. Zero-cross switching synchronizes AC voltage output cycles with DC gate signals, suppressing high-frequency emissions and preventing cross-talk across adjacent control bus wiring channels.

Standard Delivery Items

• 1 x Omron G3PE-545B-3N Three-Phase Solid State Contactor

• 1 x Integral Aluminum Heat Sink Assembly

• 1 x Terminal Protection Cover

• 1 x Installation Instruction Sheet

Field Mounting & Thermal Management Rules

• Mount the unit vertically on a standard 35 mm DIN rail or chassis plate to maximize convection airflow across cooling fins.

• Maintain at least 80 mm vertical clearance above and below the heat sink assembly for heat dissipation.

• Terminate input control lines (12 to 24 VDC) using twisted-pair cables isolated from main AC load power conduits.

• Torque power line terminal screws to recommended limits to prevent thermal hot spots under 45 A continuous current.

Frequently Asked Questions

• What function does the integrated yellow LED indicator perform?

  The yellow LED illuminates when a 12 to 24 VDC control voltage is applied to the input terminals, signaling active phototriac drive conduction.

• How does the zero cross function minimize system noise?

  The zero cross circuit delays load turn-on until the AC line voltage reaches zero, preventing high peak current surges and reducing electromagnetic interference.

• Is hot-swapping permitted while main load voltage is applied?

  Hot-swapping the contactor is strictly forbidden. Disconnect both control DC input power and 480 VAC main line power before servicing terminal screws.

• What wire insulation and rating must be used for load connections?

  Use copper conductors rated for 75 deg C or higher, sized appropriately to safely carry the continuous 45 A load current without excess voltage drop.

• Can the contactor be mounted in a horizontal orientation on a DIN rail?

  Horizontal mounting significantly degrades heat sink thermal dissipation capability, requiring severe current derating below the standard 45 A capacity.

• How does phototriac coupler insulation safeguard upstream controller outputs?

  The phototriac coupler provides 2,500 VAC optical isolation between the low-voltage DC control input circuit and high-voltage AC load terminals.

• What is the maximum operate time when applying input control voltage?

  The maximum operate time is half of the load power source cycle plus 1 ms, ensuring rapid switching alignment with the AC power waveform.

• What insulation resistance test parameter applies to this unit?

  The module maintains an insulation resistance of 100 MOhm minimum when measured at 500 VDC between input, output, and heat sink metallic surfaces.