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RA4490HA08 – SSR ZS 400V 90A 90-280V
Carlo Gavazzi RA4490HA08 solid state relay, a 90 A single phase zero switching relay designed for industrial AC load control applications.
Why Choose the Carlo Gavazzi RA4490HA08 Solid State Relay?
The Carlo Gavazzi RA4490HA08 is a high-capacity single-phase zero switching solid state relay (SSR) designed for dependable electronic switching of AC loads in industrial automation, heating and process control applications. As part of the trusted Carlo Gavazzi RA44 solid state relay series, it provides silent, fast and maintenance-free switching performance using semiconductor technology.
This solid state relay features a zero-cross switching design with an antiparallel thyristor output, helping reduce electrical interference and switching stress on connected equipment. The RA4490HA08 is engineered for demanding industrial environments where reliable high-current AC load control and long operational life are required.
With a rated operational current of 90 A AC, an operating voltage range of 42–480 V AC and a 90–280 V AC/DC control input, the RA4490HA08 is suitable for industrial control panels, heating systems, machinery and automated process equipment.
Key Advantages
- High-capacity solid state relay designed for industrial AC switching applications.
- 90 A AC load current rating for demanding industrial loads.
- Zero-cross switching technology reduces electrical interference during operation.
- 90–280 V AC/DC control input for flexible industrial control integration.
- Silent semiconductor operation with no mechanical contacts to wear.
- Optically isolated input and output for reliable system protection.
Key Features
- Carlo Gavazzi RA44 solid state relay series.
- 90 A rated operational current.
- 42–480 V AC operational load voltage.
- 90–280 V AC/DC control voltage range.
- Single-phase zero switching operation.
- Antiparallel thyristor output technology.
- 4000 V ACrms input-to-output isolation.
- Panel mounting design with screw terminals.
Reliable Electronic Switching for Industrial Control
Solid state relays such as the Carlo Gavazzi RA4490HA08 provide dependable electronic switching for industrial loads by replacing traditional mechanical contacts with semiconductor technology. This improves switching reliability, reduces maintenance requirements and supports long operational life in automated systems.
The RA44 series is designed for industrial engineers requiring robust load control in automation panels, heating systems and process equipment. Its zero-cross switching capability helps reduce electrical disturbance while maintaining efficient system operation.
Typical Applications
- Industrial heating and temperature control systems.
- Automation and machine control panels.
- Industrial ovens and thermal processing equipment.
- High-current resistive AC load switching.
- Process control systems.
- OEM electrical control assemblies.
Technical Specifications
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| Device Type | Solid State Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Switching Current (A) | 90 A | |
| Load Voltage | 42–480 V AC | |
| Mounting Type | Panel | |
| Coil / Supply Voltage | 110 V AC, 110 V DC, 115 V AC, 120 V AC, 125 V DC, 208 V AC, 220 V AC, 220 V DC, 230 V AC, 240 V AC, 250 V DC | |
| IP Rating | IP20 | |
| Manufacturer | Carlo Gavazzi | |
| Series | RA44 Solid State Relays | |
| Model | RA4490HA08 | |
| Product type | Solid state relay | |
| Switching type | Zero cross switching | |
| Output configuration | Single-phase AC thyristor output | |
| Rated operational current | 90 A AC | |
| Operational voltage range | 42–480 V AC | |
| Control voltage | 90–280 V AC/DC | |
| Operational frequency | 45–65 Hz | |
| Blocking voltage | ≥ 850 Vp | |
| Isolation voltage | ≥ 4000 V ACrms input to output | |
| Mounting type | Panel mounting | |
| Terminal type | Screw terminals | |
| Protection rating | IP20 | |
| Weight | approx. 110 g |
Frequently Asked Questions
What is the Carlo Gavazzi RA4490HA08 used for?
The RA4490HA08 is a solid state relay used for reliable switching of high-current AC loads in industrial automation, heating and control applications.
What load current can the RA4490HA08 handle?
The relay supports a rated operational current of 90 A AC.
What voltage range does the RA4490HA08 support?
The relay operates with an AC load voltage range of 42–480 V AC.
What control voltage is required?
The RA4490HA08 accepts a 90–280 V AC/DC control input.
What type of switching does this solid state relay use?
The relay uses zero-cross switching technology with a thyristor output for reliable electronic AC load control.
Trusted by Industrial Automation Engineers
Carlo Gavazzi solid state relays are widely used in industrial control systems to provide reliable, efficient and maintenance-free switching performance for automated equipment.
