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RZ3A40D40P – SSR 3 POLE ZS 24-440V 40A 4-32VDC +OTP
Carlo Gavazzi RZ3A40D40P three phase solid state relay with 400 VAC operation, 40 A load rating and 4–32 V DC control input for industrial switching applications.
Why Choose the Carlo Gavazzi RZ3A40D40P Solid State Relay?
The Carlo Gavazzi RZ3A40D40P is a robust three-phase solid state relay (SSR) designed for reliable switching of industrial loads including heating elements, motors and transformers. As part of the Carlo Gavazzi RZ3A solid state relay series, it provides zero-cross switching, high electrical isolation and dependable operation in demanding automation and industrial control applications.
This relay uses semiconductor switching technology to provide long operating life, silent switching and high switching frequency capability compared with traditional electromechanical contactors. The integrated transient protection and optional over-temperature protection with alarm output make the RZ3A series suitable for industrial environments where reliable load control is essential.
With a 400 VAC rated operational voltage, 40 A load current rating and a 4–32 V DC control input, the RZ3A40D40P is suitable for three-phase AC load switching in heating systems, machinery and process automation equipment.
Key Advantages
- Industrial three-phase solid state relay designed for reliable switching.
- Zero-cross switching technology reduces electrical stress during operation.
- 40 A load current capability for demanding industrial applications.
- 4–32 V DC control input for compatibility with automation controllers.
- Integrated transient protection with built-in varistor.
- Over-temperature protection and alarm output for enhanced system monitoring.
Key Features
- Carlo Gavazzi RZ3A solid state relay series.
- Three-phase zero switching operation.
- 400 VAC rated operational voltage.
- 40 A rated operational current.
- 4–32 V DC control voltage range.
- Built-in LED status indication.
- Integral snubber network and varistor protection.
- Panel mounting design for industrial control cabinets.
- Over-temperature protection with alarm output option included by P suffix.
Reliable Solid State Switching for Industrial Control
Solid state relays such as the Carlo Gavazzi RZ3A40D40P provide fast, silent and reliable switching for industrial electrical loads. Semiconductor-based switching technology eliminates mechanical wear, making these relays ideal for applications requiring frequent switching cycles and long service life.
The RZ3A series is designed for automation engineers and machine builders requiring dependable three-phase load control. Its integrated protection features, electrical isolation and zero-cross switching capability enable reliable operation in industrial heating and process control 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 | |
|---|---|---|
| Mounting Type | Panel | |
| Switching Current (A) | 40 A | |
| Coil / Supply Voltage | 12 V DC, 24 V DC, 5 V DC | |
| IP Rating | IP10 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RZ3A | |
| Model | RZ3A40D40P | |
| Product type | Three-phase solid state relay | |
| Switching mode | Zero switching | |
| Rated operational voltage | 400 VACrms | |
| Operational voltage range | 24–440 VAC | |
| Rated operational current | 40 A | |
| Control voltage | 4–32 V DC | |
| Frequency range | 45–65 Hz | |
| Protection rating | IP10 | |
| Mounting type | Panel mounting | |
| Dimensions (H × W × D) | approx. 103 × 73.5 × 41 mm | |
| Weight | approx. 380 g | |
| Operating temperature | -30 to +80 °C |
Frequently Asked Questions
What is the Carlo Gavazzi RZ3A40D40P used for?
The RZ3A40D40P is a three-phase solid state relay used for switching industrial loads such as heating elements, motors and transformers.
What voltage and current can this solid state relay handle?
The relay is rated for 400 VACrms operation with a load current rating of 40 A.
What control voltage does the RZ3A40D40P require?
The relay uses a 4–32 V DC control input suitable for industrial controllers and automation systems.
What switching method does this relay use?
The RZ3A40D40P uses zero-cross switching to reduce electrical stress and improve switching reliability.
Where is this solid state relay installed?
The relay is typically installed on electrical panels or control systems using suitable heat dissipation arrangements for the connected load.
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.
