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RZ3A40A75 – SSR 3/P 24-440V 75A 24-275VAC
Carlo Gavazzi RZ3A40A75 three-phase solid state relay with zero-cross switching, 75 A current rating, 24–440 V AC operating voltage and flexible AC/DC control input for industrial automation applications.
£229.32
Why Choose the Carlo Gavazzi RZ3A40A75 Solid State Relay?
The Carlo Gavazzi RZ3A40A75 is a high-performance three-phase solid state relay (SSR) designed for reliable switching of industrial AC loads in demanding automation and control applications. Part of the advanced Carlo Gavazzi RZ3A solid state relay series, it provides zero-cross switching technology, high current capability and robust semiconductor switching for industrial heating, motor and process control systems.
This panel-mounted solid state relay uses semiconductor switching technology to provide fast, silent and wear-free operation compared with traditional electromechanical relays. Its integrated overvoltage protection and three-pole design make it suitable for reliable switching in industrial environments where long service life and reduced maintenance are required.
With a 75 A AC current rating, 24–440 V AC operating voltage range, 24–275 V AC / 24–50 V DC control input and three-phase zero-cross switching, the Carlo Gavazzi RZ3A40A75 is ideal for industrial heating systems, machinery and automated process equipment.
Key Advantages
- High-current three-phase solid state relay for industrial automation applications.
- 75 A AC switching capacity for demanding industrial loads.
- Zero-cross switching technology reduces electrical noise and switching stress.
- 24–440 V AC operating voltage suitable for industrial power systems.
- Built-in overvoltage protection improves operational reliability.
- Panel mounting design with screw terminal power connections for secure installation.
Key Features
- Carlo Gavazzi RZ3A solid state relay series.
- Three-pole AC solid state switching.
- Zero-cross switching mode.
- 75 A rated operational current (AC-51).
- 20 A rated operational current (AC-53a).
- 24–275 V AC / 24–50 V DC control voltage.
- Integrated LED status indication.
- Compatible with Carlo Gavazzi RZ series heatsinks and thermal accessories.
Reliable Solid State Switching for Industrial Systems
Solid state relays such as the Carlo Gavazzi RZ3A40A75 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, high current rating and thermal accessory compatibility 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) | 20 A | |
| Load Voltage | 24–440 V AC | |
| IP Rating | IP10 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A Solid State Relay Series | |
| Model | RZ3A40A75 | |
| 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 | 75 A AC | |
| Rated current AC-53a | 20 A | |
| Control voltage AC | 24–275 V AC | |
| Control voltage DC | 24–50 V DC | |
| 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. 380 g |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A40A75 used for?
The RZ3A40A75 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 RZ3A40A75 support?
The relay supports a rated operational current of 75 A AC for AC-51 applications.
What voltage can the RZ3A40A75 switch?
The relay operates with loads from 24–440 V AC.
What type of switching technology does this relay use?
The RZ3A40A75 uses zero-cross solid state switching technology for reliable AC load control.
Where is this solid state relay typically installed?
The RZ3A40A75 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.
