Carlo Gavazzi RA2A48D40 two-pole solid state relay with 40 A AC per pole, 42–530 V AC operating voltage, 4.5–32 V DC dual control and zero-cross switching for industrial automation.
£109.23
The Carlo Gavazzi RA2A48D40 is a compact two-pole solid state relay (SSR) designed for reliable switching of AC loads in industrial automation and control systems. As part of the established Carlo Gavazzi RA2A series, it provides zero-cross switching, dual independent control and high electrical isolation in a space-saving panel-mount package.
This solid state relay provides 2-pole switching with two independently controlled outputs, allowing each pole to be operated from its corresponding DC control input. Zero-cross switching activates the output at the first zero crossing of the AC supply, helping reduce electrical transients and electromagnetic interference during switching.
With a rated operational current of 40 A AC per pole and an operating voltage range of 42–530 V AC, the RA2A48D40 is suitable for a wide range of industrial AC switching applications. Its 4.5–32 V DC control input, quick-connect FASTON power terminals and compact panel-mount design allow straightforward integration into control cabinets and automation equipment.
Solid state relays such as the Carlo Gavazzi RA2A48D40 provide fast, reliable electronic switching without the mechanical contacts used in conventional electromechanical relays. This allows frequent switching while reducing mechanical wear and helping extend service life in automated equipment.
The RA2A series uses zero-cross switching to activate the AC output close to the supply waveform's zero crossing. This helps minimise switching disturbances and makes the relay well suited to industrial control systems where dependable AC load switching and long operating life are important.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | RA2A |
| Model | RA2A48D40 |
| Product type | Solid state relay |
| Switching configuration | 2-pole / DPST |
| Output switching mode | Zero cross |
| Rated operational current | 40 A AC per pole |
| Operating voltage | 42–530 V AC |
| Blocking voltage | 1200 V peak |
| Control voltage | 4.5–32 V DC |
| Control method | Dual independent control |
| Power connection | 6.35 mm FASTON terminals |
| Isolation voltage | 4000 V AC |
| Power factor | ≥0.95 |
| Operating temperature | −20 to +70 °C |
| Mounting type | Panel mounting |
| Dimensions (H × W × D) | approx. 23.3 × 44.5 × 57.8 mm |
| Load type | Resistive AC loads |
The RA2A48D40 is a two-pole solid state relay designed for switching AC loads in industrial automation, machinery and control systems.
The relay has a rated operational current of 40 A AC per pole, when used with suitable thermal management.
The RA2A48D40 is designed for AC loads operating from 42–530 V AC, with a 1200 V peak blocking voltage.
The relay accepts a 4.5–32 V DC control voltage and provides independent control of its two switching poles.
Yes. The RA2A48D40 uses zero-cross switching, activating the AC output near the zero crossing of the supply waveform to help reduce switching transients.
Carlo Gavazzi RA2A solid state relays provide compact, reliable AC switching with independent pole control, zero-cross technology and high electrical isolation for demanding industrial automation applications.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...