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RZ3A40A55 – SSR 3/P 24-440V 55A 24-275VAC
Carlo Gavazzi RZ3A40A55 three phase solid state relay with 55 A AC rating, zero-cross switching and 24–440 V AC operating range for industrial automation applications.
£179.87
Why Choose the Carlo Gavazzi RZ3A40A55 Solid State Relay?
The Carlo Gavazzi RZ3A40A55 is a high-performance three-phase solid state relay (SSR) designed for reliable electronic switching of industrial AC loads in automation, heating and process control applications. As part of the advanced Carlo Gavazzi RZ3A solid state relay series, it provides zero-cross switching technology, robust semiconductor construction and long operational life for demanding industrial environments.
This panel-mounted solid state relay provides fast, silent and wear-free switching compared with traditional electromechanical contactors. The RZ3A series incorporates an integral snubber network, built-in varistor protection and LED indication for reliable operation in industrial control systems.
With a rated load current of 55 A AC, an operating voltage range of 24–440 V AC and a 24–275 V AC / 24–50 V DC control input, the Carlo Gavazzi RZ3A40A55 is suitable for three-phase industrial switching applications requiring dependable power control.
Key Advantages
- Compact three-phase solid state relay for industrial automation applications.
- 55 A AC load current rating for demanding industrial switching requirements.
- Zero-cross switching technology reduces electrical noise and switching stress.
- 24–440 V AC operating voltage range suitable for industrial power systems.
- Integrated snubber network and varistor protection for improved reliability.
- Silent semiconductor switching with no mechanical contact wear.
Key Features
- Carlo Gavazzi RZ3A solid state relay series.
- Three-phase SSR design.
- 55 A rated operational current at AC-51 duty.
- 15 A rated operational current at AC-53a duty.
- Zero voltage switching operation.
- 24–275 V AC / 24–50 V DC control voltage.
- 24–440 V AC switched voltage range.
- Integral snubber network and built-in varistor transient protection.
- LED indication for control input status.
- Panel mounting format with screw terminals.
Reliable Solid State Switching for Industrial Automation
Solid state relays such as the Carlo Gavazzi RZ3A40A55 provide dependable electronic switching for industrial loads without mechanical contact wear. Zero-cross switching helps minimise electrical interference while improving the operating life of connected equipment.
The RZ3A series is designed for automation engineers requiring robust three-phase switching solutions. Its wide voltage range, semiconductor switching technology and integrated protection features allow reliable operation in modern industrial control systems.
Typical Applications
- Industrial heating and temperature control systems.
- Three-phase motor switching applications.
- Industrial automation control panels.
- Process equipment and machinery.
- Plastic processing and manufacturing equipment.
- OEM electrical control systems.
- Power switching applications requiring silent operation.
Technical Specifications
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| Device Type | Solid State Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Mounting Type | Panel | |
| Switching Current (A) | 55 A | |
| Coil / Supply Voltage | 110 V AC, 115 V AC, 120 V AC, 208 V AC, 220 V AC, 230 V AC, 24 V AC, 240 V AC, 380 V AC, 400 V AC, 415 V AC, 440 V AC, 48 V AC | |
| IP Rating | IP10 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A | |
| Model | RZ3A40A55 | |
| Product type | Three-phase solid state relay | |
| Switching mode | Zero-cross switching | |
| Number of phases | 3-phase | |
| Rated operational current AC-51 | 55 A | |
| Rated operational current AC-53a | 15 A | |
| Operating voltage | 24–440 V AC | |
| Control voltage AC | 24–275 V AC | |
| Control voltage DC | 24–50 V DC | |
| Operating frequency | 45–65 Hz | |
| Mounting type | Panel mounting | |
| Connection type | Screw terminals | |
| Protection rating | IP10 | |
| Dimensions (H × W × D) | approx. 73.5 × 103 × 41 mm | |
| Operating temperature | -30 °C to +80 °C |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A40A55 used for?
The Carlo Gavazzi RZ3A40A55 is a three-phase solid state relay used for reliable electronic switching of industrial AC loads in automation and control systems.
What load current can the RZ3A40A55 handle?
The relay supports a rated operational current of 55 A AC for industrial switching applications.
What voltage range does the solid state relay support?
The RZ3A40A55 operates with loads from 24–440 V AC and accepts control voltages of 24–275 V AC or 24–50 V DC.
What switching method does this relay use?
The RZ3A40A55 uses zero-cross switching to provide efficient and low-noise electronic switching.
Where is this solid state relay typically installed?
The relay is typically installed inside electrical control panels and industrial automation systems using panel mounting.
Trusted by Industrial Automation Professionals
Carlo Gavazzi RZ3A solid state relays are widely used in industrial automation applications to provide reliable, efficient and long-life electronic switching solutions.
