ABB 1SVR405622R0000 CR-U024AC3 Pluggable Interface Switching Relay 3C/O 24VAC Coil 250V 10A DIN Rail

The ABB CR-U024AC3 (SKU: 1SVR405622R0000) is a pluggable interface switching relay from the CR-U series, featuring 3 changeover (C/O) contacts rated at 250V/10A with a 24VAC control coil. Designed for DIN rail mounting, the CR-U024AC3 delivers reliable signal switching and interface isolation in industrial control panels, PLC output stages, and automation systems. Its compact 35mm × 54.4mm × 35mm footprint and plug-in design simplify installation and field replacement without rewiring.

Technical Specifications

Certifications & Standards

• CE: Conformité Européenne — meets EU safety, health, and environmental requirements
• UKCA: UK Conformity Assessed — approved for Great Britain market
• UL 508: UL-listed for industrial control equipment (North America)
• CAN/CSA C22.2 No.14: Canadian Standards Association — industrial control equipment
• CSA C22.2: CSA certification for electrical safety compliance
• CSA: General CSA product safety certification
• IEC/EN 61810-1: Electromechanical elementary relays — general and safety requirements
• EN 61810: European standard for electromechanical relays
• IEC/EN 63000: Technical documentation for assessment of electrical and electronic equipment with respect to RoHS
• VDE: German electrical engineering certification (Verband der Elektrotechnik)
• RoHS: Restriction of Hazardous Substances — EU Directive 2011/65/EU compliant
• REACH: EU chemical safety regulation compliance (ECHA)
• CCC: China Compulsory Certification for the Chinese market
• EAC: Eurasian Conformity mark for Russia/CIS markets

Applications & Use Cases

• PLC digital output interface and signal isolation in industrial automation panels
• Machine control cabinets requiring compact, plug-in relay solutions
• HVAC, building automation, and process control switching
• Motor control and auxiliary switching circuits in industrial environments
• Field bus interface and I/O expansion modules

Frequently Asked Questions

What does the "C/O" designation mean?
C/O stands for changeover contact (also known as SPDT — Single Pole Double Throw). Each of the 3 contacts includes a normally open (NO) and normally closed (NC) connection sharing a common terminal, providing maximum switching flexibility.

Is the CR-U024AC3 plug-in or soldered?
The CR-U024AC3 is a pluggable relay designed to seat into a compatible CR-U series relay socket, allowing fast field replacement without disturbing panel wiring.

What coil voltage does this relay require?
This model is energised by a 24VAC supply connected across terminals A1 and A2.