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Omron G3PE-545B-2 — Solid State Relays

Omron G3PE-545B-2 Three-Phase Solid State Contactor, 45 A, 2

MPNG3PE-545B-2

Omron G3PE Series three-phase solid state contactor for heaters, G3PE-545B-2, 45 A at 200-480 VAC, 12-24 VDC control input, screw mounting, zero-cross function.

$165.00Ref. price · indicative, final on quote
Omron G3PE-545B-2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

G3PE-545B-2 key specifications
ParameterValue
TypeScrew mounting
Product typeThree-phase Solid State Contactors for Heaters
Rated input voltage12 to 24 VDC
Output ON voltage drop1.8 V (RMS) max.
Leakage current20 mA max. (at 480 VAC)
Poles2
PhasesThree-phase
Applicable load45 A, 200 to 480 VAC
Ambient operating temperature-30 to 80°C (with no icing or condensation)
Shock resistance294 m/s2 (reverse mounting: 98 m/s2)
Vibration resistancee 10 to 55 to10 Hz, 0.375-mm single amplitude (0.75-mm double amplitude) (Mounted to DIN track)
Ambient operating humidity45% to 85%

All specifications

G3PE-545B-2 additional specifications
ParameterValue
WeightApprox. 0.40 Kg
Shipping weight1.5 Kg
Operate time1/2 of load power source cycle + 1 ms max.
Release time1/2 of load power source cycle + 1 ms max.
Insulation methodPhototriac coupler
Dielectric strength2,500 VAC, 50/60 Hz for 1 min
Estimated lead timeUsually ships in 1-10 working days.
Operation indicatorYes (yellow)
Zero cross functionYes
Insulation resistance100 MO min. (at 500 VDC)
Ambient storage temperature-30 to 100°C (with no icing or condensation)

Product details

The Omron G3PE-545B-2 is a three-phase solid state contactor purpose-built for resistive heater loads, rated 45 A at 200 to 480 VAC. That 45 A figure is the continuous load current it can switch — sized for a three-phase heater bank drawing that line current, not a motor inrush curve. The 12 to 24 VDC control input is optically isolated via a phototriac coupler, so the PLC or thermostat output sees a low-current DC load while the power side handles the AC heater circuit. The zero-cross function turns on the output only when the AC sine wave crosses zero volts. Operate and release times are each one-half of the load power source cycle plus 1 ms maximum.

Key electrical ratings at a glance

Leakage current is 20 mA maximum at 480 VAC. Output ON voltage drop is 1.8 V RMS maximum. Dielectric strength is 2,500 VAC for 1 minute. Insulation resistance is 100 MΩ minimum at 500 VDC. The yellow operation indicator shows control voltage is present.

Frequently asked questions

What is the G3PE-545B-2 used for?

It is a three-phase solid state contactor designed specifically for switching resistive heater loads. Typical applications include industrial ovens, furnaces, injection molding barrel heaters, and HVAC duct heaters where zero-cross switching minimizes electrical noise and inrush current.

What control voltage does the G3PE-545B-2 require?

The rated input control voltage is 12 to 24 VDC. The input circuit is optically isolated via a phototriac coupler, so it presents a low-current DC load to the controlling device.

MPN
G3PE-545B-2