Omron G3PE-525B-3N DC12-24 Three-Phase Solid State Relay

Technical Overview

The Omron G3PE-525B-3N DC12-24 is a three-phase Solid State Relay (SSR) from the G3PE series, specifically engineered for precise heater control applications. It features zero-cross AC load switching, phototriac coupler insulation, and a built-in heatsink for efficient thermal management. This compact and slim-profile SSR supports both DIN rail and screw mounting, offering flexibility in installation. It conforms to UL, CSA, and EN standards (TÜV certification), ensuring reliable and safe operation in industrial environments.

Key Features

Three-phase Solid State Relay (SSR).
Zero-cross AC load switching for reduced electrical noise.
Phototriac coupler insulation for reliable operation.
Built-in heatsink for effective thermal management.
Supports both DIN rail and screw mounting options.
Rated for 25A at 200-480VAC output.
Operates with a 12-24VDC control voltage.
Conforms to UL, CSA, and EN standards (TÜV certification).
Improved surge dielectric strength for output circuits.

Technical Specification Matrix

Parameter	Value
Rated Operational Voltage (AC)	200-480 V
Operating Voltage Range (AC)	180-528 V
Rated Operation Current Ie at AC-1	25 A (at 40°C ambient temp.)
Input Voltage (DC)	12-24 VDC nominal (9.6-30 VDC range)
Number of Poles	3-poles (3P)
Mounting Method	DIN rail or screw mounting
Output ON Voltage Drop	1.8 V (RMS) max.
Leakage Current	20 mA max. (at 480 VAC)
Insulation Resistance	100 MΩ min. (at 500 VDC)
Dielectric Strength	2,500 VAC, 50/60 Hz for 1 min
Operating Temperature Range	-30°C to 80°C (no icing or condensation)
Storage Temperature Range	-30°C to 100°C (no icing or condensation)
Operating Humidity Range	45% to 85%
Switching Mode	Zero crossing

Industrial Applications

1. Industrial Oven Temperature Control

Enables precise on/off control of three-phase resistive heating elements within industrial ovens, kilns, or drying chambers, ensuring stable process temperatures.

Problem Solved

Maintains consistent and stable temperatures vital for process reliability. The zero-cross switching minimizes electrical noise, prolonging heater life and ensuring consistent heating. Its 25A current and 480VAC capability are well-suited for typical industrial heating loads, with the built-in heatsink ensuring robust performance in high-temperature environments (-30 to 80°C).

Resistive heatingPID controlIndustrial ovenThermal cyclingZero-cross switching3-phase power480VAC25A

2. Plastic Injection Molding Machine Heater Control

Manages the switching of three-phase resistive band heaters for the barrel and nozzle zones of plastic injection molding machines.

Problem Solved

Provides accurate and rapid control of heating zones, which is critical for achieving consistent melt viscosity and high product quality. The 3-phase, 25A, 480VAC output capability effectively handles the substantial power requirements of these heaters, while the 12-24VDC control voltage integrates seamlessly with standard PLC/machine controllers. Zero-cross switching reduces electromagnetic interference (EMI), protecting sensitive machine electronics.

Injection moldingBand heatersProcess heatingTemperature zonesPLC controlEMI reduction3-phase480VAC

3. HVAC/R System Defrost Heater Management

Controls three-phase defrost heaters in large commercial refrigeration units, industrial chillers, or heat pumps, facilitating efficient defrost cycles.

Problem Solved

Ensures effective and reliable defrost operations by precisely activating high-power three-phase heating elements. The robust 25A/480VAC rating is ideal for demanding defrost loads, and its wide operating temperature range (-30 to 80°C) allows for deployment in challenging ambient conditions. The zero-cross feature mitigates sudden inrush currents, safeguarding both the heating elements and the electrical infrastructure.

Defrost cycleCommercial refrigerationHVAC-RHeat pumpResistive loadInrush current3-phase480VACThermal management