Why Choose the ABB CR-U 51C Pluggable Relay Module?
The ABB CR-U 51C is a compact RC element pluggable function module designed for use with ABB CR-U universal relay sockets. This accessory module provides reliable spark quenching and arc elimination, helping improve relay switching performance and extend contact life in industrial control applications.
Designed for integration with ABB CR-U interface relay systems, the CR-U 51C supports control supply voltages from 110–230 V AC/DC. Its plug-in design allows quick installation and replacement without complex wiring changes.
Key Advantages
Designed for ABB CR-U interface relay sockets.
Provides RC suppression for spark quenching.
Improves relay switching reliability and contact protection.
Simple plug-in installation for fast maintenance.
Compact design suitable for industrial control panels.
Key Features
ABB CR-U series accessory module.
RC element for arc elimination.
Rated control supply voltage: 110–230 V AC/DC.
Pluggable function module design.
No output signal required.
Suitable for universal relay sockets.
Typical Applications
Industrial control cabinets.
PLC interface relay systems.
Automation equipment.
Machine control systems.
Electrical switching applications.
Technical Specifications
Manufacturer
ABB
Series
CR-U
Model
CR-U 51C
Product type
Pluggable RC element module
Function
Spark quenching / arc elimination
Rated control supply voltage
110–230 V AC/DC
Width
34 mm
Height
24 mm
Depth
9 mm
Weight
approx. 0.007 kg
HS Code
85480090
Country of Manufacture
China
Frequently Asked Questions
What is the ABB CR-U 51C used for?
The CR-U 51C is an RC suppression module used with ABB CR-U relay sockets to reduce switching arcs and protect relay contacts.
What voltage does the CR-U 51C support?
The module supports a rated control supply voltage of 110–230 V AC/DC.
Where is the CR-U 51C installed?
The module is installed directly into compatible ABB CR-U relay socket systems.
Trusted by Industrial Automation Engineers
ABB CR-U accessories provide reliable relay control solutions for industrial automation, electrical panels and modern control systems.
Why Choose the ABB CR-U 51D Pluggable Relay Module?
The ABB CR-U 51D is a dedicated pluggable function module for ABB CR-U universal relay sockets, designed to improve relay switching performance through integrated suppression technology. It provides dependable protection for industrial control circuits by reducing electrical interference during switching operations.
The CR-U 51D accessory is designed for easy integration into ABB relay systems, offering a compact solution for enhancing the reliability and durability of interface relay installations.
Key Advantages
Compatible with ABB CR-U relay socket systems.
Compact plug-in accessory for industrial applications.
Helps improve relay switching reliability.
Easy installation and maintenance.
Suitable for automation and control panels.
Key Features
ABB CR-U series pluggable module.
Designed for universal relay sockets.
Compact control cabinet accessory.
Reliable suppression and protection function.
Tool-free plug-in installation.
Typical Applications
Industrial automation panels.
Relay interface systems.
Machine control equipment.
PLC control installations.
Electrical distribution systems.
Frequently Asked Questions
What is the ABB CR-U 51D used for?
The CR-U 51D is a pluggable accessory module designed for ABB CR-U relay socket applications.
Which relay series uses the CR-U 51D?
The module is designed for use with ABB CR-U universal relay sockets.
Trusted by Industrial Automation Engineers
ABB CR-U relay accessories deliver dependable solutions for industrial switching, automation and control applications.
Manufacturer
ABB
Series
CR-U
Model
CR-U 51C
Product type
Pluggable RC element module
Function
Spark quenching / arc elimination
Rated control supply voltage
110–230 V AC/DC
Width
34 mm
Height
24 mm
Depth
9 mm
Weight
approx. 0.007 kg
HS Code
85480090
Country of Manufacture
China
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
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.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
Trusted Manfacturers
● frequently asked questions
Common questions about our products and support
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.
What product ranges do you supply
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Can you help specify the correct part?
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.
Do you have stock for urgent orders?
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.
What are your delivery times and costs?
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.
What about warranties, returns and faulty items?
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.
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...