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RZ3A40D55P – SSR 3 POLE ZS 24-440V 55A 4-32VDC +OTP
Carlo Gavazzi RZ3A40D55P three phase solid state relay with 55 A load rating, 24–440 V AC operation, 4–32 V DC control input and over-temperature protection for industrial switching applications.
£202.25
Why Choose the Carlo Gavazzi RZ3A40D55P Solid State Relay?
The Carlo Gavazzi RZ3A40D55P is a high-performance three-phase solid state relay (SSR) designed for reliable switching of industrial electrical loads including heating elements, motors and transformers. As part of the advanced Carlo Gavazzi RZ3A solid state relay series, it provides zero-cross switching, high electrical isolation and dependable semiconductor-based control for demanding automation applications.
This relay uses solid state switching technology to provide silent operation, long service life and reliable performance where frequent switching cycles are required. The RZ3A series incorporates built-in overvoltage protection, integral snubber protection and the P version provides over-temperature protection with alarm output for enhanced system monitoring.
With a 55 A rated operational current, 24–440 V AC operating voltage range and a 4–32 V DC control input, the RZ3A40D55P is ideal for three-phase industrial load switching in heating control, process equipment and automation systems.
Key Advantages
- Industrial three-phase solid state relay designed for reliable switching.
- 55 A load current capability for demanding industrial applications.
- Zero-cross switching technology reduces electrical stress during operation.
- 4–32 V DC control input compatible with PLCs and automation controllers.
- Integrated overvoltage protection and snubber network.
- Over-temperature protection with alarm output for improved system protection.
Key Features
- Carlo Gavazzi RZ3A solid state relay series.
- Three-phase panel mount solid state relay.
- 55 A rated operational current.
- 24–440 V AC operating voltage range.
- 4–32 V DC control voltage range.
- Zero-cross switching operation.
- Built-in overvoltage protection.
- Integral snubber network for improved switching reliability.
- Over-temperature protection with alarm output.
- Screw terminals with captive clamp connection.
Reliable Solid State Switching for Industrial Control
Solid state relays such as the Carlo Gavazzi RZ3A40D55P provide fast, silent and reliable switching for industrial loads. Semiconductor technology eliminates mechanical wear points, making these relays suitable for applications requiring frequent operation and long service life.
The RZ3A series is designed for machine builders and automation engineers requiring dependable three-phase switching performance. Its integrated protection features, zero-cross switching and over-temperature monitoring allow reliable operation in modern industrial systems.
Typical Applications
- Industrial heating systems and heating elements.
- Plastic processing and extrusion machinery.
- Thermoforming and moulding equipment.
- Industrial ovens and dryers.
- Motors, transformers and process equipment.
- Automation and machine control systems.
Technical Specifications
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| Device Type | Solid State Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Mounting Type | Panel | |
| Switching Current (A) | 15 A | |
| Coil / Supply Voltage | 12 V DC, 24 V DC, 5 V DC | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A | |
| Model | RZ3A40D55P | |
| Product type | Three-phase solid state relay | |
| Number of phases | 3-phase | |
| Switching mode | Zero-cross switching | |
| Rated operational current | 55 A AC | |
| Rated current AC-53a | 15 A | |
| Operating voltage | 24–440 V AC | |
| Control voltage | 4–32 V DC | |
| Mounting type | Panel mounting | |
| Terminal type | Screw connection with captive clamp |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A40D55P used for?
The RZ3A40D55P is a three-phase solid state relay used for switching industrial loads including heating elements, motors and transformers.
What current rating does this solid state relay support?
The relay supports a rated operational current of 55 A AC for suitable industrial applications.
What control voltage does the RZ3A40D55P require?
The relay uses a 4–32 V DC control input suitable for industrial automation controllers.
What switching method does this relay use?
The RZ3A40D55P uses zero-cross switching to reduce electrical stress and improve switching reliability.
What additional protection does the P version provide?
The P version includes over-temperature protection with alarm output to help protect the relay and connected system from excessive temperature conditions.
Trusted by Industrial Automation Engineers
Carlo Gavazzi RZ3A solid state relays are widely used in industrial automation, heating control and machine applications where reliable three-phase switching performance is required.
