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RA4025H10NCS – SSR SENSE ZS 400V 25A NPN NC
Carlo Gavazzi RA4025H10NCS single-phase solid state relay with 25 A AC-51 switching, 150–440 V AC operation, zero-cross switching and integrated system monitoring with normally closed NPN alarm output.
£62.64
Why Choose the Carlo Gavazzi RA4025H10NCS Solid State Relay?
The Carlo Gavazzi RA4025H10NCS is a high-reliability single-phase AC solid state relay (SSR) designed for controlled switching and system monitoring of industrial AC loads. As part of the Carlo Gavazzi RA SENSE solid state relay series, it combines zero-cross switching with integrated system monitoring and a normally closed NPN alarm output for enhanced control and diagnostic capability.
This solid state relay uses zero-cross switching to activate the AC output at the zero crossing of the line voltage, helping provide controlled switching and reduced electrical disturbance. Its integrated monitoring functionality can detect supply and load conditions, while the NPN normally closed alarm output provides a convenient diagnostic signal for connection to industrial control equipment.
With a rated operational current of 25 A AC for AC-51 loads and 5 A AC for AC-53a loads, together with an operating voltage range of 150–440 V AC, the RA4025H10NCS is suitable for industrial AC switching applications. It accepts a 7–32 V DC control input and requires a 20–32 V DC external supply for its monitoring system.
Key Advantages
- Reliable single-phase solid state relay with integrated system monitoring.
- 25 A rated current for AC-51 loads.
- 5 A rated current for AC-53a loads.
- 150–440 V AC operating voltage for industrial switching applications.
- Zero-cross switching provides controlled AC load switching.
- Integrated supply and load monitoring for diagnostic applications.
- Normally closed NPN alarm output for fault and status signalling.
- Panel-mount construction with screw terminals for straightforward installation.
Key Features
- Carlo Gavazzi RA SENSE solid state relay series.
- Single-phase AC switching configuration.
- 25 A rated operational current at AC-51.
- 5 A rated operational current at AC-53a.
- 150–440 V AC operating voltage.
- 1000 Vp peak blocking voltage.
- 7–32 V DC control voltage.
- 20–32 V DC external supply for system monitoring.
- Zero-cross switching for controlled AC switching.
- Integrated system and load monitoring.
- Normally closed NPN alarm output.
- Screw terminal power connections.
- Panel-mount or heatsink-mount installation.
Reliable Solid State Switching with System Monitoring
Solid state relays such as the Carlo Gavazzi RA4025H10NCS use semiconductor switching rather than mechanical contacts, providing reliable and repeatable control of AC loads. The zero-cross switching function activates the output at the zero crossing of the AC waveform, helping reduce switching disturbance and electrical stress.
The RA SENSE series adds monitoring capability to the switching circuit, making the RA4025H10NCS suitable for applications where the condition of the supply and load needs to be supervised. Its normally closed NPN alarm output can be incorporated into a PLC or other control system for diagnostic and fault signalling.
Typical Applications
- Industrial automation control panels.
- AC load switching and control.
- Industrial heating and temperature control systems.
- Production and processing machinery.
- Electrical control cabinets and automation equipment.
- OEM machinery requiring load monitoring.
Technical Specifications
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| Device Type | Solid State Relay | |
|---|---|---|
| Terminal Type | Screw | |
| Mounting Type | Panel | |
| Switching Current (A) | 25 A | |
| Coil / Supply Voltage | 12 V DC, 24 V DC | |
| Manufacturer | Carlo Gavazzi | |
| Series | RA SENSE / RGS..S | |
| Model | RA4025H10NCS | |
| Product type | Single-phase AC solid state relay with system monitoring | |
| Switching mode | Zero cross / zero voltage | |
| Number of poles | 1 | |
| Rated operational current AC-51 | 25 A AC | |
| Rated operational current AC-53a | 5 A AC | |
| Operating voltage | 150–440 V AC | |
| Peak blocking voltage | 1000 Vp | |
| Control voltage | 7–32 V DC | |
| External supply | 20–32 V DC | |
| Alarm output | Normally closed NPN | |
| Output configuration | NC, NPN | |
| Mounting type | Panel mounting / heatsink mounting | |
| Power connection | Screw terminals | |
| Operating temperature | -20 to 70 °C | |
| Dimensions (H × W × D) | approx. 44.5 × 29 × 57.8 mm |
Frequently Asked Questions
What is the Carlo Gavazzi RA4025H10NCS used for?
This solid state relay is designed for single-phase AC switching and system monitoring in industrial automation, machinery and electrical control applications.
What current can the RA4025H10NCS switch?
The relay has a rated operational current of 25 A AC for AC-51 loads and 5 A AC for AC-53a loads.
What supply voltage can the RA4025H10NCS switch?
The RA4025H10NCS is designed for AC operating voltages from 150–440 V AC and has a 1000 Vp peak blocking voltage.
What control voltage does the RA4025H10NCS require?
The relay accepts a 7–32 V DC control voltage and uses a 20–32 V DC external supply for its system monitoring functionality.
What monitoring feature does the RA4025H10NCS provide?
The RA4025H10NCS provides integrated system monitoring with a normally closed NPN alarm output for diagnostic and fault signalling.
Trusted for Industrial Switching and Monitoring
Carlo Gavazzi RA SENSE solid state relays combine dependable zero-cross AC switching with integrated system monitoring and diagnostic signalling for industrial automation applications.
