Why Choose the ABB CR-U3SM Small Relay Socket?
The ABB CR-U3SM is a compact small relay socket designed specifically for ABB CR-U universal pluggable relays with three changeover contacts. Part of the ABB CR-U interface relay range, it provides a secure mechanical and electrical interface for installing compatible relays in industrial automation, machinery and electrical control systems.
The CR-U3SM is designed for 3 C/O (3PDT) CR-U relays and features dependable screw connection terminals for secure conductor termination. Its compact socket format is particularly useful where panel space is limited, while the plug-in arrangement enables a compatible relay to be installed or replaced without disturbing the permanent field wiring.
Designed for installation on a standard 35 mm DIN rail, the CR-U3SM measures just 38 × 24.2 × 68.2 mm. Compatible holder and marker accessories are available for the CR-U socket system, making it a practical choice for organised, maintainable relay interface assemblies.
Key Advantages
- Purpose-designed small socket for ABB CR-U universal relays.
- Suitable for 3 C/O (3PDT) relay configurations.
- Screw connection terminals provide secure conductor termination.
- Compact design helps conserve valuable control-panel space.
- Plug-in relay arrangement simplifies servicing and relay replacement.
- Compatible holder and marker accessories are available.
- Suitable for 35 mm DIN rail mounting.
- Ideal for industrial automation and electrical interface applications.
Key Features
- ABB CR-U universal relay range.
- Small socket design for space-efficient installations.
- Designed for 3 C/O (3PDT) CR-U pluggable relays.
- Screw connection terminals.
- 250 V rated operational voltage.
- DIN rail mounting for modular control-panel construction.
- Compatible with ABB CR-U holder and marker accessories.
- Compact 38 mm width and 68.2 mm depth.
Compact Connections for CR-U Universal Relays
The ABB CR-U3SM provides the electrical and mechanical interface between a compatible three-changeover CR-U relay and permanent control-panel wiring. Its screw terminals provide secure conductor connections, while the socket-based arrangement allows the relay itself to be removed or replaced without rewiring the connected circuit.
Compared with the larger CR-U socket format, the CR-U3SM is specifically designed as a small socket, making it useful where installation space is at a premium. Holder and marker accessories are available for the CR-U socket system to support relay retention and clear circuit identification.
Typical Applications
- Industrial electrical control panels.
- PLC and controller interface circuits.
- Machine building and factory automation.
- Compact CR-U universal relay assemblies.
- Process control systems.
- Motor control and auxiliary switching circuits.
- Industrial signal isolation and interface applications.
