Carlo Gavazzi RA4850-D12 single-phase solid state relay with zero-cross switching, 50 A current rating and 3–32 V DC control input for industrial AC load control.
£54.40
The Carlo Gavazzi RA4850-D12 is a high-performance single-phase solid state relay (SSR) designed for reliable electronic switching of AC loads in industrial automation, heating systems and power control applications. As part of the proven Carlo Gavazzi RA48 solid state relay series, it combines zero-cross switching technology, semiconductor reliability and robust industrial construction for demanding control environments.
This panel-mounted SSR provides fast, silent and maintenance-free switching compared with traditional electromechanical relays. Its semiconductor-based output technology improves reliability for applications requiring frequent switching cycles, while the compact hockey-puck style housing allows straightforward installation with suitable thermal management.
With a rated operating current of 50 A AC, an operating voltage range of 42–530 V AC and a 3–32 V DC control input, the RA4850-D12 is ideal for industrial load switching applications including heating control, machinery and automation systems.
Solid state relays such as the Carlo Gavazzi RA4850-D12 provide dependable electronic switching by using semiconductor technology instead of mechanical contacts. This enables silent operation, rapid response and extended service life in applications requiring frequent switching cycles.
The RA48 series is designed for industrial automation engineers requiring reliable AC load control, compact installation and efficient switching performance. Zero-cross technology helps minimise electrical stress while maintaining accurate control of connected equipment.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | RA48 Solid State Relays |
| Model | RA4850-D12 |
| Product type | Solid state relay |
| Relay configuration | SPST-NO (1 Form A) |
| Number of phases | 1-phase |
| Switching mode | Zero cross |
| Rated operating current AC-51 | 50 A AC |
| Rated operating current AC-53a | 15 A AC |
| Operating voltage | 42–530 V AC |
| Control voltage | 3–32 V DC |
| Blocking voltage | 1200 V peak |
| Output type | Thyristor |
| Mounting type | Panel / chassis mounting |
| Connection type | Screw terminals |
| Operating temperature | -20 to 70 °C |
| Dimensions | approx. 44.5 × 29 × 57.8 mm |
The RA4850-D12 is a single-phase solid state relay used for reliable electronic switching of AC loads in industrial automation and control applications.
The relay supports a rated operating current of 50 A AC for AC-51 applications.
The RA4850-D12 operates with an AC load voltage range of 42–530 V AC.
The relay uses zero-cross switching technology with semiconductor output switching for reliable AC load control.
The relay is typically installed inside industrial control panels for automation, heating and AC power switching applications.
Carlo Gavazzi solid state relays are widely used in industrial automation applications where reliable, efficient and maintenance-free electronic switching is required.
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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...