ABB 1SFA611525R1101 MPEK4-11R Emergency Stop 1NO+1NC Mushroom Head Push Button

The ABB MPEK4-11R (SKU: 1SFA611525R1101) is a compact emergency stop push button device designed for industrial control panel and automation safety applications. Featuring a 1NO+1NC contact configuration, the MPEK4-11R provides reliable emergency stop functionality in a 40 mm x 40 mm footprint, making it suitable for machine control stations and operator panels where rapid, dependable circuit interruption is essential.

Technical Specifications

Certifications & Standards

• CE: Complies with European Union directives for health, safety, and environmental protection.
• cULus: Listed by Underwriters Laboratories for both Canadian and US markets, confirming product safety to North American standards.
• CCC: China Compulsory Certification, required for sale and import into the Chinese market.
• RoHS: Restriction of Hazardous Substances — free from lead, mercury, cadmium, and other restricted substances per EU Directive 2011/65/EU.
• REACH: Compliant with EU REACH regulation (EC No 1907/2006) on chemical substances.
• WEEE: Compliant with EU Waste Electrical and Electronic Equipment Directive for responsible end-of-life disposal.
• UKCA: UK Conformity Assessed marking for products placed on the Great Britain market post-Brexit.

Applications & Use Cases

• Machine tool and industrial machinery emergency stop circuits
• Control panel operator interfaces requiring safety stop functionality
• Automation lines where rapid circuit interruption is mandated by safety standards
• Pendant control stations and operator consoles
• General industrial automation and process control environments

Frequently Asked Questions

What does MPEK4-11R mean?
The MPEK4-11R catalog number designates an ABB emergency stop push button in the MPEK4 model range, with a 1NO+1NC (one normally open, one normally closed) contact block configuration and a standard mushroom-head actuator.

Is the ABB 1SFA611525R1101 suitable for North American installations?
Yes. The MPEK4-11R carries cULus certification, confirming compliance with safety standards for both the United States and Canada.

What are the physical dimensions of this emergency stop?
The MPEK4-11R measures 40 mm (W) × 40 mm (H) × 68 mm (D) and weighs 65 g, making it a compact choice for space-constrained panels.