Carlo Gavazzi DUA52C748 DC undervoltage monitoring relay designed for 48 V DC supply monitoring and fault detection in industrial control systems.
£84.46
The Carlo Gavazzi DUA52C748 is a compact and reliable DC undervoltage monitoring relay designed to protect electrical systems by continuously monitoring DC supply voltage and detecting undervoltage conditions. As part of the trusted Carlo Gavazzi DUA52 monitoring relay series, it provides dependable voltage supervision for battery systems, industrial automation and electrical control applications.
This monitoring relay measures its own DC power supply and switches its relay output when the monitored voltage falls below the configured threshold. Its adjustable hysteresis, LED status indication and compact DIN-rail housing make it suitable for reliable protection of industrial DC systems.
With a 38–58 V DC monitoring range, a self-powered design and a SPDT relay output, the DUA52C748 is ideal for monitoring 48 V DC systems including battery supplies, generator backup batteries and industrial control equipment.
Voltage monitoring relays such as the Carlo Gavazzi DUA52C748 provide continuous supervision of DC supplies to help protect automation equipment, battery systems and electrical control circuits. By detecting undervoltage conditions, they can trigger alarms or control actions before system performance is affected.
The DUA52 series is designed for industrial engineers and panel builders requiring compact and dependable DC voltage monitoring solutions. Its self-powered operation, adjustable hysteresis and relay output allow straightforward integration into electrical control systems.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | DUA52 |
| Model | DUA52C748 |
| Product type | DC undervoltage monitoring relay |
| Monitoring function | Undervoltage |
| Voltage monitoring range | 38–58 V DC |
| Nominal system voltage | 48 V DC |
| Supply voltage | Self-powered |
| Output | 1 × SPDT relay |
| Contact rating | 5 A at 250 V AC |
| Hysteresis | Adjustable 4–50% |
| Time delay | No adjustable delay |
| 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 |
| Operating temperature | -20 to +60 °C |
The DUA52C748 is used to monitor DC supply voltage and provide relay switching when an undervoltage condition is detected.
The relay monitors DC voltage within the 38–58 V DC 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.
The relay is commonly used for monitoring 48 V DC batteries, backup power systems and industrial DC control supplies.
Carlo Gavazzi DUA52 monitoring relays are widely used in industrial control applications to provide reliable DC voltage supervision, fault detection and protection for electrical systems.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...