ABB 1SVR500020R1100 CT-MFD.21 Multifunction Timer Relay 2C/O 12-240V AC/DC 5A 250V

The ABB CT-MFD.21 (SKU: 1SVR500020R1100) is a multifunction timer relay from the CT-D series, offering 2 changeover (2C/O) contacts with a wide supply voltage range of 12–240V AC/DC — making it one of the most versatile timing relays for industrial control panel applications. The CT-MFD.21 supports multiple timing functions in a single compact 17.5 mm wide device, simplifying inventory and reducing panel footprint for automation engineers and panel builders.

Technical Specifications

Certifications & Standards

• CE: Complies with European conformity requirements for electrical equipment
• UKCA: UK Conformity Assessed marking for the Great Britain market
• RoHS: Restriction of Hazardous Substances compliant
• REACH: Compliant with EU REACH regulation on chemical substances
• CCC: China Compulsory Certification for the Chinese market
• UL 508: Listed for industrial control equipment per UL 508
• CSA / CAN/CSA C22.2 No.14: Canadian Standards Association certification for industrial control equipment
• IEC/EN 61812-1: Complies with the international standard for time relays for industrial and residential use
• IEC/EN 63000: Technical documentation standard for RoHS assessment
• EN 61812: European standard for time relays

Applications & Use Cases

• Industrial control panels requiring flexible, multifunction timing sequences
• Machine automation with start/stop delay, interval, and pulse timing requirements
• HVAC, pump, and motor control systems needing programmable time delays
• Building automation and process control where a single universal supply voltage (12–240V AC/DC) is advantageous
• OEM equipment manufacturers seeking a compact, certified timing solution