Description

The CARLO GAVAZZI RA2325H06PCS is a robust, panel-mountable 3-phase solid state relay (SSR) engineered for high-cycle, high-reliability switching of resistive and inductive AC loads in demanding industrial automation environments. Designed for applications such as industrial heating, motor control, transformer switching, and plastic extrusion systems, the CARLO GAVAZZI RA2325H06PCS delivers silent, spark-free operation with no moving parts—eliminating contact wear, arcing, and electromagnetic interference associated with electromechanical relays. Its zero-crossing switching technology ensures smooth load energization, minimizing inrush currents and electrical noise on the power line.

As part of CARLO GAVAZZI’s RA series—a globally recognized family of industrial SSRs—the CARLO GAVAZZI RA2325H06PCS combines a 25A per-phase current rating with a wide 48–660VAC operating voltage range, offering exceptional versatility across global power systems. The unit features an integrated aluminum heat sink and is compatible with optional DIN rail mounting brackets, facilitating efficient thermal management in compact control panels. With built-in overvoltage protection, snubber circuits, and compliance with international safety standards (including UL, CE, and RoHS), the CARLO GAVAZZI RA2325H06PCS provides a maintenance-free, long-life solution for continuous or high-frequency switching tasks where reliability and uptime are paramount.

Technical Specifications

Main Features and Advantages

Zero-crossing switching for extended equipment life: The CARLO GAVAZZI RA2325H06PCS activates only when the AC waveform crosses zero volts, dramatically reducing inrush currents during heater or transformer startup. This gentle switching minimizes thermal stress on heating elements and prevents voltage spikes that could disrupt sensitive electronics—making it ideal for precision temperature control in food processing, injection molding, and semiconductor manufacturing.

High-density thermal design with integrated heat sink: Unlike many SSRs requiring external cooling solutions, the CARLO GAVAZZI RA2325H06PCS comes with a factory-installed aluminum heat sink that efficiently dissipates heat generated during operation. This allows reliable 25A switching in confined panels without forced air cooling. For even easier installation, optional snap-on DIN rail clips enable quick mounting alongside PLCs or contactors.

Universal compatibility and rugged construction: The wide 12–24 VDC control input accommodates most PLC digital outputs, while the 48–660 VAC load range covers global low- and medium-voltage systems—from North American 240 VAC to European 400 VAC and Asian 600 VAC industrial networks. The CARLO GAVAZZI RA2325H06PCS is built with high-quality triacs, reinforced isolation barriers, and conformal-coated PCBs to withstand humidity, dust, and electrical transients common in heavy industry.

Maintenance-free operation with diagnostic-ready status: With no mechanical contacts to degrade, the CARLO GAVAZZI RA2325H06PCS offers virtually unlimited mechanical life (>100 million operations). Although it lacks a built-in LED (common in smaller SSRs), its robust design ensures consistent performance in high-vibration environments like packaging lines or conveyor systems. When paired with upstream fusing and proper derating, it delivers decades of trouble-free service—reducing unplanned downtime and spare parts inventory costs.

Application Field

The CARLO GAVAZZI RA2325H06PCS excels in applications requiring frequent, reliable switching of three-phase AC loads without the limitations of electromechanical contactors. In industrial ovens and furnaces used for metal heat treatment or glass tempering, it precisely modulates power to heating elements based on PID controller signals—enabling tight temperature regulation while avoiding contact welding or pitting. Similarly, in plastic extrusion and blow molding machines, the CARLO GAVAZZI RA2325H06PCS controls barrel and die heaters with high cycle rates, ensuring consistent melt viscosity and product quality.

Food and beverage processing plants rely on the CARLO GAVAZZI RA2325H06PCS for pasteurization tunnels, cooking kettles, and sterilization chambers, where hygiene, reliability, and smooth power delivery are critical. Its silent operation also makes it suitable for environments where acoustic noise from contactor chatter is unacceptable. In water and wastewater facilities, the relay switches aeration blowers or chemical dosing pumps, benefiting from its immunity to corrosive atmospheres. Additionally, renewable energy systems—such as solar thermal plants or biomass boilers—use the CARLO GAVAZZI RA2325H06PCS to manage auxiliary heating circuits, leveraging its wide voltage tolerance and long operational life under continuous duty.

Related Products

• RA2325H06PC: Identical to RA2325H06PCS but without the “S” suffix; functionally equivalent (the “S” often denotes specific regional or packaging variant)

• RA2340H06PCS: Higher-current version rated at 40 A per phase—used for larger heaters or motors

• RA2310H06PCS: Lower-current (10 A) variant for light-duty 3-phase loads or pilot circuits

• RM2325H06: Modular DIN rail version of the same 25A 3-phase SSR—designed for rail-mounted panels

• CA2325H06: Heat sink-only version without integrated terminals—requires separate wiring blocks

• RD2325H06: Random-turn-on (non-zero-crossing) version for phase-angle control applications like dimming or soft-start

• RA1A25H06: Single-phase 25A SSR—used when only one leg of a 3-phase system needs switching

Installation and Maintenance

Pre-installation preparation: Before installing the CARLO GAVAZZI RA2325H06PCS, ensure adequate airflow around the integrated heat sink—maintain at least 20 mm clearance on all sides. Torque output terminals to 1.5 Nm using properly sized ring or fork lugs to prevent overheating. Always fuse each phase on the load side with time-delay (slow-blow) fuses rated at 1.5× the full-load current (e.g., 40 A for a 25 A load) to protect against short circuits. Verify that the control signal from the PLC or thermostat is within 12–24 VDC and capable of sourcing at least 15 mA per input.

Maintenance recommendations: The CARLO GAVAZZI RA2325H06PCS contains no user-serviceable components and requires no routine maintenance. However, periodic thermographic inspection during operation is recommended to detect abnormal heating at terminals or the SSR body—indicative of loose connections or overload conditions. If the relay fails to switch, first confirm control voltage presence and correct polarity, then check for blown fuses or open-circuit loads. Never attempt to repair the unit; replace it as a whole. Always keep a spare CARLO GAVAZZI RA2325H06PCS in inventory for critical processes, as solid state failures are typically sudden and non-recoverable.