Carlo Gavazzi RA4490-D08 solid state relay, a 90 A single phase zero switching relay designed for industrial AC load control applications.
£153.78
The Carlo Gavazzi RA4490-D08 is a high-capacity single-phase zero switching solid state relay (SSR) designed for reliable electronic switching of AC loads in industrial automation, heating and process control applications. As part of the established Carlo Gavazzi RA44 solid state relay series, it provides silent, fast and maintenance-free switching using advanced semiconductor technology.
This solid state relay features an antiparallel thyristor output and zero-cross switching operation, helping minimise electrical interference and switching stress on connected equipment. The RA4490-D08 is designed for demanding industrial environments where dependable high-current AC load control and long service life are required.
With a rated operational current of 90 A AC, an operating voltage range of 42–480 V AC and a 3–32 V DC control input, the RA4490-D08 is suitable for industrial control panels, heating systems, machinery and automated process equipment.
Solid state relays such as the Carlo Gavazzi RA4490-D08 provide dependable electronic switching for industrial loads by replacing traditional mechanical contacts with semiconductor technology. This improves switching reliability, reduces maintenance requirements and supports long operational life in automated systems.
The RA44 series is designed for industrial engineers requiring robust load control in automation panels, heating systems and process equipment. Its zero-cross switching capability helps reduce electrical disturbance while maintaining efficient system operation.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | RA44 Solid State Relays |
| Model | RA4490-D08 |
| Product type | Solid state relay |
| Switching type | Zero cross switching |
| Output configuration | Single-phase AC thyristor output |
| Rated operational current | 90 A AC |
| Operational voltage range | 42–480 V AC |
| Control voltage | 3–32 V DC |
| Operational frequency | 45–65 Hz |
| Non-repetitive peak voltage | ≥ 850 Vp |
| Isolation voltage | ≥ 4000 V ACrms input to output |
| Mounting type | Panel mounting |
| Terminal type | Screw terminals |
| Protection rating | IP20 |
| Weight | approx. 110 g |
The RA4490-D08 is a solid state relay used for reliable switching of high-current AC loads in industrial automation, heating and control applications.
The relay supports a rated operational current of 90 A AC.
The relay operates with an AC load voltage range of 42–480 V AC.
The RA4490-D08 accepts a 3–32 V DC control input.
The relay uses zero-cross switching technology with a thyristor output for reliable electronic AC load control.
Carlo Gavazzi solid state relays are widely used in industrial control systems to provide reliable, efficient and maintenance-free switching performance for automated equipment.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...