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RZ3A48D55P – RZ 55A 480V DC IP + OVER TEMP PROTECTION
Carlo Gavazzi RZ3A48D55P solid state relay, a three-phase 55 A zero-cross switching relay designed for industrial automation and AC load control applications.
£208.81
Why Choose the Carlo Gavazzi RZ3A48D55P Solid State Relay?
The Carlo Gavazzi RZ3A48D55P is a high-performance three-phase solid state relay (SSR) designed for reliable switching of industrial AC loads including heating elements, motors and process equipment. Part of the advanced Carlo Gavazzi RZ3A solid state relay series, it combines zero-cross switching technology with robust semiconductor power switching for demanding automation applications.
This panel-mounted SSR provides efficient and dependable load control while reducing mechanical wear associated with traditional electromechanical relays. The RZ3A48D55P includes built-in over-temperature protection and alarm output functionality, helping improve system monitoring and operational safety in industrial environments.
With a rated operating current of 55 A AC, a 480 V AC operating voltage range up to 530 V AC and a 4–32 V DC control input, the RZ3A48D55P is suitable for three-phase industrial heating and automation applications requiring reliable high-current switching.
Key Advantages
- Advanced three-phase solid state relay designed for industrial switching applications.
- 55 A AC rated current for high-power load control.
- Zero-cross switching technology reduces electrical noise and improves switching reliability.
- 4–32 V DC control input compatible with PLCs and automation controllers.
- Integrated over-temperature protection and alarm output.
- Built-in overvoltage protection for improved system reliability.
Key Features
- Carlo Gavazzi RZ3A solid state relay series.
- Three-pole AC solid state switching.
- Zero-cross switching mode.
- 55 A AC-51 rated operational current.
- 15 A AC-53a rated operational current.
- 480 V AC rated operational voltage.
- 4–32 V DC control voltage.
- Panel mounting design with screw terminals.
- LED status indication for relay operation and protection status.
Reliable Solid State Switching for Industrial Automation
Solid state relays such as the Carlo Gavazzi RZ3A48D55P use semiconductor technology to provide fast, silent and reliable switching of electrical loads. Zero-cross operation helps minimise electrical interference, making the relay suitable for sensitive industrial control systems.
The RZ3A series is engineered for automation equipment manufacturers and industrial engineers requiring dependable switching performance. Its robust construction, integrated protection features and compatibility with PLC control systems make it ideal for modern industrial installations.
Typical Applications
- Industrial heating systems and electrical ovens.
- Plastic processing and extrusion machinery.
- Thermoforming and moulding equipment.
- Packaging and production machinery.
- Climate control and air handling systems.
- Industrial automation and process control equipment.
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 | 12 V DC, 24 V DC, 5 V DC | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A Solid State Relays | |
| Model | RZ3A48D55P | |
| Product type | Three-phase solid state relay | |
| Switching mode | Zero cross switching | |
| Number of poles | 3 | |
| Rated operational current | 55 A AC | |
| Rated current AC-51 | 55 A | |
| Rated current AC-53a | 15 A | |
| Operating voltage | 42–530 V AC | |
| Rated voltage | 480 V AC | |
| Control voltage | 4–32 V DC | |
| Operating frequency | 45–65 Hz | |
| Mounting type | Panel mounting | |
| Connection type | Screw terminals with captive clamp | |
| Dimensions | Approx. 103 × 73.5 × 47.6 mm | |
| Weight | Approx. 380 g |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A48D55P used for?
This solid state relay is used for switching three-phase AC loads in industrial automation, heating and process control applications.
What current rating does the RZ3A48D55P support?
The relay supports a rated operational current of 55 A AC for AC-51 applications.
What control voltage is required?
The RZ3A48D55P operates with a 4–32 V DC control input, allowing direct connection to many industrial controllers and PLC outputs.
What protection features are included?
The relay includes built-in overvoltage protection and over-temperature protection with alarm output.
Where is this solid state relay installed?
The RZ3A48D55P is designed for panel mounting inside industrial control cabinets and automation systems.
Trusted by Industrial Automation Engineers Worldwide
Carlo Gavazzi RZ3A solid state relays are trusted by automation engineers and machine builders for reliable three-phase load switching, efficient operation and long service life in demanding industrial environments.
