440T-MRKSE100H

Overview of Allen Bradley 440T-MRKSE100H

The Allen Bradley 440T-MRKSE100H is a trapped key interlock switch engineered to provide reliable electrical isolation and enhance safety protocols within industrial environments. This rotary-type interlock allows mechanical safeguarding of hazardous machinery by ensuring energy sources are fully isolated before any access is permitted. Designed for enclosure mounting, it features a single-key rotary mechanism that enforces sequential interlocking—making it impossible to access protected zones unless the correct conditions are met. This model helps prevent improper access during machine maintenance or changeover, reducing risk for operators and simplifying compliance with stringent safety standards. Manufactured with robust materials and precision engineering, the 440T-MRKSE100H is suitable for use in high-demand automation settings where safety and uptime are critical.

Key Features of Allen Bradley 440T-MRKSE100H

• Single key rotary trapped key interlock for enclosure mounting
• Ensures electrical isolation and safe access for machinery
• 4 Normally Open (NO) or 2 NO and 2 Normally Closed (NC) contact configurations available
• 20 Amp current rating for robust switching performance
• Compliant with EN ISO 14119 and can be used in safety applications up to Category 3, PLd
• Stainless steel key and dust cap for durability in industrial environments

Technical Specs of 440T-MRKSE100H

• Type: Single Key Rotary Switch – Enclosure Mounted
• Contacts: 4 NO or 2 NO + 2 NC versions available
• Current Rating: 20 A
• Material: Stainless steel key, industrial-grade housing
• Standards: CE Marked, TÜV Certified, EN ISO 14119, EN ISO 13489-1 Cat 3, PLd
• Proof Test Interval (T1): 20 years
• Safety Integrity Level: Up to PLd
• Country of Origin: Multiple

Applications / Use Case

The Allen Bradley 440T-MRKSE100H is widely used where secure and sequenced machine access is essential. Typical applications include machinery that requires energy isolation before gate or guard access—such as packaging lines, automotive manufacturing cells, and robotic workstations. This interlock switch supports safe maintenance and operational procedures by preventing unexpected energization and restricting entry until all safety steps are confirmed. It is ideal for environments where upholding international safety standards is necessary and where downtime due to accidents must be minimized. The robust design and versatility ensure the 440T-MRKSE100H delivers dependable performance in both automated and manual isolation scenarios, making it suitable for OEMs, panel builders, and end users focused on operator security.

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