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RZ3A40A40 – SSR 3/P 24-440V 40A 24-275VAC
Carlo Gavazzi RZ3A40A40 three phase solid state relay with 40 A AC rating, zero-cross switching and 24–440 V AC operating range for industrial automation applications.
Why Choose the Carlo Gavazzi RZ3A40A40 Solid State Relay?
The Carlo Gavazzi RZ3A40A40 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 proven Carlo Gavazzi RZ3A solid state relay series, it provides zero-cross switching technology, robust semiconductor operation and long service life for demanding industrial environments.
This panel-mounted solid state relay replaces traditional electromechanical switching devices by providing fast, silent and wear-free operation. The integrated snubber network and varistor protection improve switching reliability, while the compact design allows straightforward integration into industrial control panels.
With a rated load current of 40 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 RZ3A40A40 is suitable for three-phase industrial switching applications requiring reliable and efficient power control.
Key Advantages
- Compact three-phase solid state relay for industrial automation applications.
- 40 A AC load current rating for high-power 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 varistor and snubber 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.
- 40 A rated operational current.
- 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 protection.
- LED indication of control input status.
- Panel mounting format for industrial control systems.
Reliable Solid State Switching for Industrial Automation
Solid state relays such as the Carlo Gavazzi RZ3A40A40 provide dependable electronic switching for industrial loads without mechanical contact wear. Zero-cross switching helps minimise electrical interference while improving the operational 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.
- 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) | 40 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 | RZ3A40A40 | |
| Product type | Three-phase solid state relay | |
| Switching mode | Zero-cross switching | |
| Number of phases | 3-phase | |
| Rated operational current | 40 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 RZ3A40A40 used for?
The Carlo Gavazzi RZ3A40A40 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 RZ3A40A40 handle?
The relay supports a rated operational current of 40 A AC for industrial switching applications.
What voltage range does the solid state relay support?
The RZ3A40A40 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 RZ3A40A40 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.
