Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
DIA53S72420A – 20AAC CURRENT RELAY
Carlo Gavazzi DIA53S72420A single-phase AC overcurrent monitoring relay with 2–20 A AC input range, self-powered operation and solid-state output for industrial applications.
£53.25
Why Choose the Carlo Gavazzi DIA53S72420A Current Monitoring Relay?
The Carlo Gavazzi DIA53S72420A is a compact and reliable single-phase AC overcurrent monitoring relay designed to detect excessive current levels in industrial automation and electrical protection systems. As part of the Carlo Gavazzi DIA53 current monitoring relay series, it provides accurate current supervision with a built-in current transformer and solid-state output for dependable machine monitoring applications.
This monitoring relay continuously measures AC current and switches its output when the adjustable overcurrent threshold is exceeded. The self-powered design and two-wire connection simplify installation, making the DIA53S72420A suitable for electrical panels, machinery protection and automation control systems.
With a 2–20 A AC input range, NPN/PNP open collector solid-state output and a compact 17.5 mm DIN-rail housing, the DIA53S72420A provides a space-saving solution for reliable current monitoring in industrial environments.
Key Advantages
- Compact AC overcurrent monitoring relay for industrial applications.
- 2–20 A AC current monitoring range for flexible load supervision.
- Self-powered operation reduces wiring requirements.
- NPN/PNP open collector solid-state output for simple control integration.
- Built-in current transformer enables straightforward current measurement.
- 17.5 mm DIN-rail mounting housing saves valuable control panel space.
Key Features
- Carlo Gavazzi DIA53 current monitoring relay series.
- Single-phase AC overcurrent monitoring.
- 2–20 A AC adjustable current range.
- ON/OFF overcurrent monitoring function.
- Solid-state NPN/PNP open collector output.
- Self-powered two-wire connection.
- Integrated current transformer.
- Compact mini DIN-rail installation.
Reliable Current Monitoring for Industrial Systems
Current monitoring relays such as the Carlo Gavazzi DIA53S72420A help protect machinery and electrical equipment by detecting abnormal current conditions. By identifying overcurrent events, these devices support improved equipment reliability and faster fault detection.
The DIA53 series is designed for automation engineers, panel builders and maintenance professionals requiring compact current monitoring solutions with simple installation and dependable solid-state switching performance.
Typical Applications
- Industrial motor protection systems.
- Machine load monitoring.
- Pump and fan current supervision.
- Electrical control panels.
- Automation equipment monitoring.
- Industrial fault detection systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Mounting Type | DIN rail | |
|---|---|---|
| Monitoring Function | Current | |
| Current | 72420 A | |
| IP Rating | IP20 | |
| Manufacturer | Carlo Gavazzi | |
| Series | DIA53 Current Monitoring Relays | |
| Model | DIA53S72420A | |
| Product type | AC overcurrent monitoring relay | |
| Monitoring type | Single-phase AC current monitoring | |
| Current input range | 2–20 A AC | |
| Monitoring function | Overcurrent | |
| Output type | Solid-state NPN/PNP open collector | |
| Supply type | Self-powered | |
| Connection type | Two-wire connection | |
| Mounting type | Mini DIN-rail mounting | |
| Housing width | 17.5 mm | |
| Protection rating | IP20 | |
| Dimensions (H × W × D) | approx. 81 × 17.5 × 67.2 mm |
Frequently Asked Questions
What is the Carlo Gavazzi DIA53S72420A used for?
The DIA53S72420A is used for monitoring single-phase AC current and detecting overcurrent conditions in industrial electrical systems.
What current range can the DIA53S72420A monitor?
The relay monitors AC current within a 2–20 A range.
Does the DIA53S72420A require a separate power supply?
No. The relay is self-powered, simplifying installation with a two-wire connection.
What type of output does the DIA53S72420A provide?
The relay provides a solid-state NPN/PNP open collector output.
How is the Carlo Gavazzi DIA53S72420A installed?
The relay is designed for installation on a mini DIN rail inside industrial control panels.
Trusted by Industrial Engineers Worldwide
Carlo Gavazzi monitoring relays are widely used in industrial automation systems to provide dependable current supervision, fault detection and improved equipment protection.
