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RZ3A48D55 – RZ 55A 480V DC IP
Carlo Gavazzi RZ3A48D55 three-phase solid state relay with 480 V AC switching, 55 A output rating and 4–32 V DC control input for industrial automation systems.
£182.71
Why Choose the Carlo Gavazzi RZ3A48D55 Solid State Relay?
The Carlo Gavazzi RZ3A48D55 is a high-performance three-phase solid state relay (SSR) designed for reliable switching of industrial AC loads in automation systems, heating equipment and machine control applications. As part of the advanced Carlo Gavazzi RZ3A series, it provides zero-cross switching technology, high current capability and long operational life for demanding industrial environments.
This solid state relay uses semiconductor switching technology to provide fast, silent and wear-free operation compared with traditional electromechanical relays. The RZ3A series is designed for three-phase applications requiring dependable switching performance, efficient thermal management and reliable operation in industrial control panels.
With a 480 V AC operational voltage, a 55 A three-phase output rating and a 4–32 V DC control input, the RZ3A48D55 is suitable for controlling industrial loads including heaters, machinery and automation equipment.
Key Advantages
- Advanced three-phase zero-cross solid state relay for industrial switching.
- 55 A AC output current rating for high-power industrial applications.
- 480 V AC operational voltage suitable for demanding power systems.
- 4–32 V DC control input compatible with PLCs and automation controllers.
- Silent semiconductor switching with no mechanical contact wear.
- Integrated protection features including built-in overvoltage protection.
Key Features
- Carlo Gavazzi RZ3A three-phase solid state relay series.
- Zero-cross switching technology.
- 3-pole AC switching output.
- 55 A rated operational current.
- 4–32 V DC control voltage.
- Built-in overvoltage protection.
- Integrated snubber network.
- LED indication for control input status.
- Panel-mount industrial housing.
Reliable Three-Phase Switching for Industrial Automation
Solid state relays such as the Carlo Gavazzi RZ3A48D55 provide reliable electronic switching for industrial loads where frequent operation, silent performance and long service life are required. Semiconductor switching eliminates mechanical wear, making the relay suitable for demanding automation environments.
The RZ3A series is designed for machine builders, electrical engineers and control panel manufacturers requiring dependable three-phase load switching with compact panel-mounted construction and integrated protection features.
Typical Applications
- Industrial heating systems.
- Plastic processing machinery.
- Ovens and thermal control equipment.
- Motor switching applications.
- Packaging and production machinery.
- Automation control panels.
Technical Specifications
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| Device Type | Solid State Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Load Voltage | 480 V AC | |
| Switching Current (A) | 55 A | |
| Coil / Supply Voltage | 12 V DC, 24 V DC, 5 V DC | |
| IP Rating | IP10 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A Three-Phase Solid State Relays | |
| Model | RZ3A48D55 | |
| Product type | Three-phase solid state relay | |
| Switching mode | Zero cross switching | |
| Number of poles | 3 | |
| Rated operational voltage | 480 V AC | |
| Operational voltage range | 42–530 V AC | |
| Control voltage | 4–32 V DC | |
| Rated operational current | 55 A AC | |
| AC-53a motor switching rating | 15 A AC | |
| Minimum operational current | 250 mA AC | |
| Operational frequency | 45–65 Hz | |
| Blocking voltage | 1200 Vp | |
| Non-repetitive surge current | 600 Ap (10 ms) | |
| I²t for fusing | 1800 A²s | |
| Protection rating | IP10 | |
| Connection type | Screw terminal with captive clamp | |
| Dimensions (H × W × D) | approx. 103 × 73.5 × 41 mm | |
| Weight | approx. 370 g | |
| Operating temperature | -30°C to +80°C |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A48D55 used for?
The RZ3A48D55 is a three-phase solid state relay used for switching high-power AC loads in industrial automation, heating and machine control applications.
What voltage can the RZ3A48D55 switch?
The relay is designed for 480 V AC applications with an operational voltage range of approximately 42–530 V AC.
What is the output current rating of this solid state relay?
The RZ3A48D55 provides a 55 A AC operational current rating for three-phase industrial loads.
What control voltage does the relay require?
The relay accepts a 4–32 V DC control input.
What switching technology does this relay use?
The RZ3A48D55 uses zero-cross semiconductor switching to provide reliable and low-wear operation.
Trusted by Industrial Automation Engineers Worldwide
Carlo Gavazzi RZ3A solid state relays are used by automation engineers and machine builders to deliver reliable three-phase switching, efficient control and long-lasting semiconductor-based performance.
