ABB 1SNA645001R0300 RB121-24VUC R600 Series 1C/O 6A 24VAC/DC Coil DIN Rail Interface Switching Relay

The ABB RB121-24VUC (SKU: 1SNA645001R0300) is a compact 1-pole interface switching relay from the R600 series, designed for seamless integration into control panels and automation systems. Featuring a 24VAC/DC coil voltage and a 1C/O (SPDT) contact rated at up to 6A / 250VAC, this DIN rail-mounted relay bridges logic-level control signals to load circuits with reliable performance across a wide current range of 10mA to 6A. Its slim 6mm profile makes the RB121-24VUC ideal for space-constrained installations.

Technical Specifications

Certifications & Standards

• UL 508: Industrial Control Equipment — North American market acceptance
• CCC: China Compulsory Certification for the Chinese market
• CQC: China Quality Certification Centre voluntary product certification
• UL 94-V0: Flammability rating for plastic enclosure material
• CAN/CSA C22.2 No.14: Canadian standard for industrial control equipment
• IEC/EN 63000: Technical documentation for RoHS compliance assessment
• IEC/EN 60947-5-1: Low-voltage switchgear — control circuit devices and switching elements
• EN 60947-5: Low-voltage switchgear and controlgear — control circuit devices
• CSA C22.2: Canadian Standards Association electrical safety standard
• CSA: General CSA certification for the North American market
• REACH: EU regulation on registration, evaluation, authorisation and restriction of chemicals
• RoHS: Restriction of Hazardous Substances — EU Directive compliance
• CE: Conformité Européenne — European Economic Area market access
• UKCA: UK Conformity Assessed — Great Britain market access post-Brexit

Applications & Use Cases

• PLC output signal isolation and amplification in industrial automation panels
• Interface between low-power control circuits and higher-current load circuits
• Building automation and HVAC control systems
• Machine control cabinets requiring slim, high-density relay installations
• General-purpose switching in industrial and commercial electrical installations