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RZ3A40D40 – SSR 3/P 24-440V 40A 4-32 VDC
Carlo Gavazzi RZ3A40D40 three-phase solid state relay with zero-cross switching, 40 A current rating, 24–440 V AC operating voltage and 4–32 V DC control input for industrial automation applications.
£92.94
Why Choose the Carlo Gavazzi RZ3A40D40 Solid State Relay?
The Carlo Gavazzi RZ3A40D40 is a high-performance three-phase solid state relay (SSR) designed for reliable switching of industrial AC loads in demanding automation and process control applications. Part of the advanced Carlo Gavazzi RZ3A solid state relay series, it provides zero-cross switching technology, semiconductor reliability and robust performance for industrial machinery, heating systems and automated processes.
This panel-mounted solid state relay uses semiconductor switching technology to provide fast, silent and wear-free operation compared with traditional electromechanical relays. The RZ3A series includes integrated overvoltage protection and is designed for reliable control of loads such as heating elements, motors and industrial equipment where long service life is required.
With a 40 A AC current rating, 24–440 V AC operating voltage, 4–32 V DC control input and three-phase zero-cross switching, the Carlo Gavazzi RZ3A40D40 is suitable for industrial automation systems, process control equipment and machinery applications.
Key Advantages
- High-performance three-phase solid state relay for industrial automation.
- 40 A AC switching capacity for reliable industrial load control.
- Zero-cross switching technology reduces electrical noise and switching stress.
- 24–440 V AC operating voltage suitable for industrial power applications.
- 4–32 V DC control input compatible with common PLC and automation outputs.
- Built-in overvoltage protection improves operational reliability.
Key Features
- Carlo Gavazzi RZ3A solid state relay series.
- Three-phase AC solid state switching.
- Zero-cross switching mode.
- 40 A rated operational current for AC-51 applications.
- 4–32 V DC control voltage.
- Integrated overvoltage protection.
- LED input and status indication.
- Screw terminal power connection for secure panel installation.
Reliable Solid State Switching for Industrial Systems
Solid state relays such as the Carlo Gavazzi RZ3A40D40 provide fast and reliable electronic switching for industrial AC loads. Unlike mechanical relays, semiconductor switching eliminates moving parts, helping improve service life and reduce maintenance requirements in demanding applications.
The RZ3A series is designed for industrial automation engineers and machine builders requiring dependable three-phase load control. Its zero-cross switching, integrated protection features and high-current capability make it suitable for a wide range of industrial processes.
Typical Applications
- Industrial heating systems.
- Plastic extrusion and thermoforming machinery.
- Industrial ovens and dryers.
- Motor and process control equipment.
- Climate control and HVAC systems.
- Automated production machinery.
Technical Specifications
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| Device Type | Solid State Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Switching Current (A) | 40 A | |
| Load Voltage | 24–440 V AC | |
| Coil / Supply Voltage | 12 V DC, 24 V DC, 5 V DC | |
| IP Rating | IP10 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A Solid State Relay Series | |
| Model | RZ3A40D40 | |
| Product type | Three-phase solid state relay | |
| Switching mode | Zero cross | |
| Number of poles | 3 | |
| Rated operational voltage | 24–440 V AC | |
| Rated operational current | 40 A AC | |
| Control voltage | 4–32 V DC | |
| Switching technology | Thyristor solid state output | |
| Power connection | Screw terminals with captive clamp | |
| Protection rating | IP10 | |
| Operating temperature | -30 °C to +80 °C | |
| Dimensions (W × H × D) | approx. 73.5 × 103 × 41 mm | |
| Weight | approx. 374 g |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A40D40 used for?
The RZ3A40D40 is a three-phase solid state relay used for reliable switching of industrial AC loads in automation and process control applications.
What current rating does the RZ3A40D40 support?
The relay supports a rated operational current of 40 A AC for industrial switching applications.
What voltage can the RZ3A40D40 switch?
The relay operates with loads from 24–440 V AC.
What type of control input does this relay require?
The RZ3A40D40 uses a 4–32 V DC control input suitable for industrial automation controllers.
Where is this solid state relay typically installed?
The RZ3A40D40 is typically installed in industrial control panels for machinery, heating systems and automated process equipment.
Trusted by Industrial Automation Professionals
Carlo Gavazzi RZ3A solid state relays provide reliable high-current switching solutions for automation engineers and machine builders requiring efficient, long-life industrial control components.
