IEC 61076-2-111:2017

Overview

IEC 61076-2-111:2017 is an international product specification for circular connectors with M12 screw-locking intended for power applications. The standard covers 4‑ to 6‑way circular connectors (fixed and free), rewireable and non‑rewireable, with current ratings up to 16 A and voltage ratings of 63 V or 630 V. Male contacts are specified with round contact diameters of Ø1.0 mm and Ø1.5 mm. Multiple codings (E, F, K, L, M, S, T) are defined to prevent unintended mating with similarly sized interfaces or cross‑mating between codings. Note: M12 refers to the thread diameter used by the screw‑locking mechanism.

Key Topics

• Connector types and styles: fixed (panel-mounted) and free (cable) variants, rewireable and non‑rewireable assemblies.
• Electrical ratings: current and voltage limits (up to 16 A; 63 V or 630 V), contact configurations (4–6 ways).
• Mechanical and dimensional requirements: precise interface dimensions, thread M12 locking, contact diameters, mounting options and gauge definitions.
• Codings and polarization: multiple codings to ensure compatibility control and prevent incorrect mating.
• Safety and performance: creepage and clearance distances, voltage proof, insulation resistance, contact resistance and rated impulse voltages.
• Environmental and mechanical tests: climatic categories, vibration, shock, IP degree (ingress protection), mechanical operation, insertion/withdrawal and retention forces.
• Marking and identification: requirements for marking parts and insulation materials for traceability and safety.
• Test schedules and verification: standardized test groups for preliminary, climatic/dynamic, mechanical endurance, electrical loading and chemical resistivity.

Applications and Who Uses This Standard

IEC 61076-2-111 is primarily used for power supply and power distribution applications in industrial premises where compact M12 circular power connectors are required. Typical users include:

• Connector and cable assembly manufacturers (product design and certification)
• Industrial automation and machine builders (component selection and panel design)
• Electrical designers and OEMs specifying power interfaces
• Test laboratories and conformity assessment bodies verifying performance
• Procurement/specification teams ensuring compatibility and safety in installations

This standard helps ensure reliable power connections, safe voltage/current handling, controlled mating behavior (via coding), and consistent mechanical performance.

Related Standards

• IEC 61076-1 (compatibility levels and general connector requirements)
• Other parts of the IEC 61076 series covering different connector sizes, functions and codings

Keywords: Connectors, Circular Connectors, M12, M12 screw-locking, IEC 61076-2-111, power connectors.