Carlo Gavazzi DUA55CM44 single phase AC voltage monitoring relay designed for overvoltage and undervoltage window monitoring in industrial control systems.
£101.21
The Carlo Gavazzi DUA55CM44 is a compact and reliable single-phase AC voltage window monitoring relay designed to protect electrical systems by detecting when supply voltage moves outside a selected tolerance range. As part of the Carlo Gavazzi DUA55 monitoring relay series, it provides dependable voltage supervision for industrial automation, machinery and electrical control applications.
This monitoring relay measures its own supply voltage and activates its relay output when the monitored voltage is outside the configured voltage window. With selectable tolerance settings, LED status indication and a compact DIN-rail housing, it is suitable for reliable monitoring of industrial mains supplies.
With a 208–480 V AC nominal monitoring range, a self-powered design and a SPDT relay output, the DUA55CM44 is ideal for applications requiring protection against incorrect mains voltage conditions.
Voltage monitoring relays such as the Carlo Gavazzi DUA55CM44 provide continuous supervision of electrical supplies to help protect machinery and control systems from incorrect voltage conditions. By detecting abnormal mains voltage levels, they can trigger protective actions before equipment operation is affected.
The DUA55 series is designed for industrial engineers and panel builders requiring compact and dependable voltage monitoring solutions. Its self-powered operation, relay output and DIN-rail format allow straightforward integration into electrical control systems.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | DUA55 |
| Model | DUA55CM44 |
| Product type | Single-phase AC voltage monitoring relay |
| Monitoring function | Overvoltage and undervoltage window monitoring |
| Voltage monitoring range | 177–550 V AC |
| Nominal supply range | 208–480 V AC |
| Supply voltage | Self-powered |
| Frequency | 45–65 Hz |
| Output | 1 × SPDT relay |
| Contact rating | 5 A at 250 V AC |
| Voltage tolerance | ±10% or ±15% |
| Mounting type | Mini DIN-rail mounting |
| Housing width | 17.5 mm |
| Protection rating | IP20 |
| Dimensions (W × H × D) | approx. 17.5 × 81 × 67.2 mm |
The DUA55CM44 is used to monitor single-phase AC voltage and detect when the supply moves outside the selected voltage tolerance window.
The relay monitors single-phase AC voltage within a 208–480 V AC nominal range.
The relay detects both overvoltage and undervoltage conditions when the supply moves outside the configured tolerance range.
The relay provides a SPDT relay output for connection to alarms, contactors or control systems.
The relay is designed for installation inside electrical control panels using a compact 17.5 mm DIN-rail mounting housing.
Carlo Gavazzi DUA55 monitoring relays are widely used in industrial control applications to provide reliable voltage supervision, fault detection and protection for electrical equipment.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...