Omron G3NH-4150B Solid State Relay

The Omron G3NH-4150B is a high-power solid state relay engineered for industrial mounting applications requiring reliable, maintenance-free switching of AC loads. This industrial-grade SSR belongs to the G3NH series, which is renowned for its robust construction and ability to handle substantial load currents while maintaining precise control characteristics. The G3NH-4150B utilizes photocoupler isolation technology to provide complete electrical separation between the control input and the load circuit, ensuring safe operation in demanding industrial environments.

The monoblock construction integrates the power switching elements and heat sink into a single, easy-to-mount assembly, simplifying installation and reducing overall system footprint. The relay features a replaceable power cartridge design, allowing the power module to be replaced without disconnecting wiring when maintenance is required. Built-in operation indicator provides visual confirmation of relay status, while the integrated varistor offers protection against voltage transients. This model incorporates zero cross function technology, which switches the load only when the AC voltage waveform crosses zero, significantly reducing electromagnetic interference and inrush currents.

Key Features

• High Load Capacity: Rated for 150A load current at 180-440VAC, suitable for heavy industrial loads.

• Dual Control Voltage Options: Available with 100-240VAC or 5-24VDC control inputs.

• Monoblock Construction: Integrated heat sink design eliminates need for external heat sinking.

• Replaceable Power Cartridge: Power module can be replaced without rewiring, reducing downtime.

• Built-in Protection: Integrated varistor provides surge protection for the output circuit.

Technical Specifications

Applications

The G3NH-4150B solid state relay is ideally suited for heavy-duty industrial switching applications. Typical deployments include industrial heating systems requiring precise temperature control, motor control circuits for pumps and fans, lighting control for large facilities, power supply switching in manufacturing equipment, and HVAC system control in commercial buildings. The zero cross switching characteristic makes this SSR particularly suitable for resistive loads where minimizing EMI is critical.