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ABB CR-U 81 Pack of 10 Pluggable Modules
£34.84 per pack of 10
Why Choose the ABB CR-U 81 Pluggable Relay Module?
The ABB CR-U 81 (1SVR405666R2000) is a compact pluggable function module designed for ABB CR-U universal relay sockets. This accessory module provides reliable varistor-based overvoltage protection, helping protect relay coils and control circuits against switching voltage transients in industrial automation applications.
Designed for the ABB CR-U interface relay series, the CR-U 81 offers a simple plug-in solution for enhancing relay protection without additional wiring. The integrated varistor suppresses transient overvoltages generated during relay switching operations, improving system reliability and component protection.
With a rated control supply voltage of 230 V AC, the ABB CR-U 81 is suitable for industrial control panels, PLC interface systems and electrical automation applications requiring dependable relay coil protection.
Key Advantages
- Designed for ABB CR-U universal relay sockets.
- Provides varistor-based overvoltage protection.
- Protects relay coils from switching voltage spikes.
- Compact plug-in design simplifies installation and maintenance.
- No additional wiring required for module installation.
Key Features
- ABB CR-U series pluggable function module.
- CR-U 81 varistor protection module without LED.
- Rated control supply voltage: 230 V AC.
- Integrated transient voltage suppression function.
- Designed for universal CR-U relay socket mounting.
- Compact accessory format for industrial control systems.
Reliable Relay Coil Protection
The ABB CR-U 81 improves relay circuit reliability by reducing the effects of transient overvoltages created during switching operations. The integrated varistor helps protect relay components and connected control devices, supporting longer service life and stable operation.
As part of the ABB CR-U accessory family, this pluggable module allows engineers to customise relay assemblies with additional protection features while maintaining a compact installation footprint.
Typical Applications
- Industrial automation control panels.
- PLC interface relay systems.
- Machine control equipment.
- Electrical switching cabinets.
- Factory automation installations.
- Control and monitoring circuits.
Technical Specifications
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| Device Type | Accessory | |
|---|---|---|
| Mounting Type | Plug-in socket | |
| Coil / Supply Voltage | 230 V AC | |
| Manufacturer | ABB | |
| Series | CR-U | |
| Model | CR-U 81 | |
| Product ID | 1SVR405666R2000 | |
| Product type | Pluggable function module | |
| Application | Accessory for CR-U interface relays | |
| Function | Overvoltage protection | |
| Protection component | Varistor | |
| LED indication | None | |
| Rated control supply voltage | 230 V AC | |
| Output | None | |
| Output signal | None | |
| Mounting type | Plug-in relay socket mounting | |
| Compatible series | ABB CR-U universal relay sockets | |
| 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 81 used for?
The ABB CR-U 81 is a pluggable relay accessory module that provides varistor overvoltage protection for ABB CR-U relay sockets.
What voltage does the CR-U 81 support?
The CR-U 81 supports a rated control supply voltage of 230 V AC.
Which relay series is compatible with this module?
The CR-U 81 is designed for use with ABB CR-U universal relay socket systems.
Does the CR-U 81 include LED indication?
No. The CR-U 81 is a varistor protection module without LED indication.
Trusted by Industrial Automation Engineers
ABB CR-U pluggable function modules provide dependable relay accessories for industrial automation, electrical panels and modern control applications.
