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RZ3A40A40P – SSR 3 POLE ZS 24-440V 40A 24-275VAC +OTP
Carlo Gavazzi RZ3A40A40P three phase solid state relay with 40 A AC rating, zero-cross switching and integrated over-temperature protection for industrial automation applications.
Why Choose the Carlo Gavazzi RZ3A40A40P Solid State Relay?
The Carlo Gavazzi RZ3A40A40P 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 integrated over-temperature protection for demanding industrial environments.
This panel-mounted solid state relay provides fast, silent and wear-free switching compared with traditional electromechanical contactors. The integrated thermal protection and alarm output improve system monitoring and reliability, while the compact design enables straightforward installation in 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 RZ3A40A40P 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.
- Integrated over-temperature protection with alarm output monitoring.
- 24–440 V AC operating voltage range suitable for industrial power systems.
- 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.
- Integrated snubber network and varistor transient protection.
- Over-temperature protection with alarm output.
- LED indication for control input and alarm status.
- Panel mounting format for industrial control systems.
Reliable Solid State Switching for Industrial Automation
Solid state relays such as the Carlo Gavazzi RZ3A40A40P 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 integrated thermal protection, wide voltage range and semiconductor switching technology 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 | |
| Switching Current (A) | 40 A | |
| Mounting Type | Panel | |
| IP Rating | IP10 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A | |
| Model | RZ3A40A40P | |
| Product type | Three-phase solid state relay | |
| Switching mode | Zero-cross switching | |
| Number of phases | 3-phase | |
| Rated operational current | 40 A | |
| Rated operational voltage | 400 VACrms | |
| Operational voltage range | 24–440 V AC | |
| Control voltage AC | 24–275 V AC | |
| Control voltage DC | 24–50 V DC | |
| Operating frequency | 45–65 Hz | |
| Additional protection | Over-temperature protection | |
| Alarm output | Available | |
| Mounting type | Panel mounting | |
| Connection type | Screw terminals | |
| Protection rating | IP10 | |
| Dimensions (H × W × D) | approx. 73.5 × 103 × 41 mm | |
| Weight | approx. 380 g | |
| Operating temperature | -30 °C to +80 °C |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A40A40P used for?
The Carlo Gavazzi RZ3A40A40P 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 RZ3A40A40P 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 RZ3A40A40P operates with loads from 24–440 V AC and accepts control voltages of 24–275 V AC or 24–50 V DC.
What protection features are included?
The relay includes integrated over-temperature protection with an alarm output for improved system monitoring.
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.
