The Omron G3PE-525B-2 is a three-phase solid state contactor purpose-built for heater loads — not a general-purpose motor starter, but a zero-cross switching SSR designed to cycle resistive heating elements without the mechanical wear of an electromechanical contactor. Rated for a continuous load of 25 A across 200 to 480 VAC, it switches all three phases simultaneously via a phototriac coupler, with an output ON voltage drop of 1.8 V (RMS) max and leakage current of 20 mA max at 480 VAC. The control input is 12 to 24 VDC, and the part includes a yellow operation indicator for quick visual confirmation of the on-state on the panel.
The 25 A rating at 200-480 VAC is the continuous load current for a three-phase heater bank — sized for a resistive load up to roughly 20 kW at 480 V three-phase. The zero-cross function means the SSR switches on only when the AC sine wave crosses zero, minimizing inrush and EMI into the heater circuit. Screw mounting means this unit is designed for direct panel or chassis mounting via its integral screw flanges — not a DIN-rail snap-on. Plan for two M4 or equivalent mounting holes on the backplate, and allow clearance for the power and control wiring terminations. Operate and release times are specified as 1/2 of the load power source cycle plus 1 ms max — at 50/60 Hz that is roughly 9-10 ms. Fast enough for temperature cycling control loops, but not for high-speed on/off duty like a servo brake.
The screw-mount form factor and 25 A / 200-480 VAC rating are the deciding parameters for panel integration. The estimated lead time is typically 1-10 working days, but this is a planning guide — confirm at order placement.
Ambient operating temperature range is -30 to 80°C with no icing or condensation — wide enough for most industrial cabinet environments, including near ovens or in unheated plant areas. Storage range extends to 100°C. Shock resistance is 294 m/s² (about 30 g) in standard mounting orientation, derated to 98 m/s² (10 g) for reverse mounting. Vibration resistance is 0.375 mm single amplitude at 10-55 Hz when mounted to DIN track — though this unit is screw-mounted, the vibration spec still applies to the mounting surface. Dielectric strength is tested at 2,500 VAC for 1 minute between input/output and case — standard for industrial SSR isolation. Insulation resistance is 100 MΩ min at 500 VDC.