IEC 61076-2-111:2025

Overview

IEC 61076-2-111:2025 is the IEC detail specification for circular M12 screw‑locking power connectors used in industrial premises. It covers 4‑ to 6‑way connectors with M12 screw locking, specifying product and interface requirements for connectors with current ratings of 8 A, 12 A or 16 A per contact and voltage ratings that vary by coding (e.g., 50 V AC / 60 V or up to 630 V as defined by the coding). The standard includes mechanical drawings, electrical and mechanical characteristics, test schedules and marking/identification rules for reliable power supply connections.

Key topics and technical requirements

• Connector types and styles: Dimensional details and illustrations for fixed and free (rewirable / non‑rewirable) connector styles and mounting options.
• Mating and interface dimensions: Detailed interface drawings and contact positions for common M12 codings (F, K, L, M, S, T), ensuring interoperability.
• Electrical characteristics: Requirements and test methods for rated insulation voltage, impulse withstand, current‑carrying capacity, contact resistance and insulation resistance.
• Mechanical characteristics: Insertion/withdrawal forces, contact retention, locking (M12 screw‑locking) and mechanical operation criteria.
• Environmental and safety: Classification into climatic categories, creepage and clearance distances, degree of protection (IP), vibration and shock resistance.
• Termination and wiring: Methods of termination, pin assignment, and arrangements for rewirable and non‑rewirable designs.
• Performance, compatibility and tests: Performance levels, compatibility levels per IEC 61076‑1, basic and full test schedules, dynamic stress arrangements, gauges and retention force specifications.
• Marking and documentation: Requirements for marking ratings, coding and insulation material; informative annexes cover recommended female body diameters and cable outlet orientation.

Practical applications and who uses this standard

IEC 61076‑2‑111 is intended for:

• Connector manufacturers designing M12 power connectors and producing technical datasheets.
• OEMs and system integrators specifying robust power interfaces for factory automation, machinery, motor drives, sensors and distributed power modules.
• Panel builders and electrical installers selecting connectors for safe, coded power connections in industrial premises.
• Test laboratories and certification bodies verifying conformity to electrical, mechanical and environmental tests defined in the standard.
• Procurement and spec writers creating compliant component specifications to ensure interchangeability and safety.

Use cases include power distribution to devices in industrial control systems, compact motor/pump connections, and applications requiring screw‑locking M12 robustness and coded prevention of mis‑mating.

Related standards

• IEC 61076‑1 (compatibility levels and general connector requirements) - referenced for compatibility and performance frameworks within the M12 connector family.