ABB 1SAM201903R1002 SK1-20 2NO 9mm Signaling Auxiliary Contact Block

The ABB SK1-20 auxiliary contact block (SKU 1SAM201903R1002) is a compact 2NO signaling contact designed for use with ABB manual motor starters and motor protection circuit breakers. The SK1-20 measures just 9mm wide, making it ideal for space-constrained control panel installations where reliable status signaling and interlocking are required. Weighing only 35g, this side-mount auxiliary contact delivers dependable performance in industrial automation and motor control applications.

Technical Specifications

Certifications & Standards

• CE: Complies with European Union CE marking directives for electrical equipment
• REACH: Compliant with EU REACH regulation on chemical substances (EC 1907/2006)
• IEC 60068-2: Tested to IEC 60068-2 environmental testing standards for durability and reliability
• CSA: Certified by the Canadian Standards Association for North American markets
• RoHS: Restriction of Hazardous Substances compliant — free from restricted materials
• WEEE: Compliant with EU Waste Electrical and Electronic Equipment Directive
• CCC: China Compulsory Certification for sale and use in China
• cUL: cUL listed for Canadian safety requirements under UL standards
• UKCA: UK Conformity Assessed marking for Great Britain market compliance

Applications & Use Cases

The ABB SK1-20 signaling contact block is widely used alongside ABB manual motor starters and motor protection circuit breakers to provide auxiliary status signals for control circuits, PLC inputs, and interlocking schemes. Its 2NO configuration makes the SK1-20 the preferred choice when two independent normally open signaling contacts are needed — for example, to indicate a motor starter's ON state to a supervisory control system or to enable remote monitoring in distribution boards and motor control centers (MCCs). The slim 9mm profile ensures minimal panel space consumption in automation cabinets.