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RS1A40D40 – SSR ZS 400V 40A 4.5-32 VDC LED
Carlo Gavazzi RS1A40D40 solid state relay with zero-cross switching, 40 A AC rating, 42–440 V AC operating voltage and 4–32 V DC control input for industrial applications.
£41.02
Why Choose the Carlo Gavazzi RS1A40D40 Solid State Relay?
The Carlo Gavazzi RS1A40D40 is a compact and reliable solid state relay (SSR) designed for industrial switching applications requiring fast, silent and maintenance-free control of AC loads. As part of the Carlo Gavazzi RS1A solid state relay series, it provides zero-cross switching technology, semiconductor switching and dependable performance for industrial automation and electrical control systems.
This panel-mounted solid state relay provides reliable switching without mechanical contacts, helping improve service life and reduce maintenance requirements in demanding industrial environments. The RS1A40D40 is suitable for single-phase AC load control applications including heating systems, process automation and industrial machinery.
With a 40 A AC rated current, 42–440 V AC operating voltage range and a 4–32 V DC control input, the RS1A40D40 provides flexible switching control for industrial applications using a compact panel-mount format.
Key Advantages
- Reliable solid state relay designed for industrial switching applications.
- 40 A AC load rating suitable for industrial control systems.
- Zero-cross switching technology reduces switching stress and electrical noise.
- 4–32 V DC control input compatible with automation controllers.
- No mechanical contacts for silent operation and extended service life.
- Panel-mount design for straightforward electrical cabinet installation.
Key Features
- Carlo Gavazzi RS1A solid state relay series.
- Single-pole panel mount SSR design.
- Zero-cross switching mode.
- 40 A rated current AC-51.
- 42–440 V AC operating voltage.
- 4–32 V DC control voltage.
- Screw terminal connection with captive clamp.
- Suitable for use with compatible Carlo Gavazzi heatsinks.
Reliable Solid State Switching for Industrial Automation
Solid state relays such as the Carlo Gavazzi RS1A40D40 use semiconductor technology to switch electrical loads without mechanical contacts. This provides fast response, silent operation and improved durability compared with traditional electromechanical relays.
The RS1A series is designed for industrial automation engineers and control panel builders requiring dependable AC load switching, compact installation and reliable operation in demanding environments.
Typical Applications
- Industrial heating control systems.
- Process automation equipment.
- Temperature control applications.
- Industrial machinery switching.
- Electrical control panels.
- OEM automation systems.
Technical Specifications
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| Device Type | Solid State Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Switching Current (A) | 40 A | |
| Mounting Type | Panel | |
| Coil / Supply Voltage | 12 V DC, 24 V DC, 5 V DC | |
| IP Rating | IP20 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RS1A Solid State Relays | |
| Model | RS1A40D40 | |
| Product type | Solid state relay | |
| Number of poles | 1 | |
| Switching mode | Zero cross | |
| Rated current AC-51 | 40 A | |
| Operating voltage | 42–440 V AC | |
| Control voltage | 4–32 V DC | |
| Power connection | Screw terminal with captive clamp | |
| Mounting type | Panel mounting | |
| Output type | Solid state switching | |
| Protection rating | IP20 |
Frequently Asked Questions
What is the Carlo Gavazzi RS1A40D40 used for?
The RS1A40D40 is a solid state relay used for switching AC loads in industrial automation and control applications.
What voltage can the RS1A40D40 switch?
The relay operates with AC loads from 42–440 V AC.
What control voltage does the relay require?
The RS1A40D40 uses a 4–32 V DC control input.
What is zero-cross switching?
Zero-cross switching activates the relay output close to the AC voltage zero point, helping reduce electrical noise and switching stress.
Does the relay require a heatsink?
Heat dissipation requirements depend on the application load and operating conditions. Compatible Carlo Gavazzi heatsinks can be used for thermal management.
Trusted by Industrial Automation Engineers
Carlo Gavazzi solid state relays are widely used in industrial automation applications where reliable switching, long operating life and efficient control are essential.
