Metric Circular Connector

Metric Circular Connectors

ATTEND's Metric Circular Connectors (M5, M8, M12, and M23) deliver versatile connectivity with 2–12 pin configurations in multiple arrangements, supporting current ratings from 0.5A to 20A and voltage ratings from 50V to 250V. The lineup includes the SPE M8 Connector, designed to integrate data and power transmission within a single cable assembly, compliant with IEEE 802.3 SPE T1 protocols and supporting data rates up to 1 Gbps while maintaining IP67 environmental protection. These industrial-grade waterproof connectors operate within a temperature range of -20°C to +85°C, providing reliable performance for diverse industrial automation applications that demand high durability and stability.

Specification	M5 Connector	M8 Connector	M12 Connector	M23 Connector
Thread Size	M5 x 0.5	M8 x 1.0	M12 x 1.0	M23 x 1.5
Pin Configurations	2, 3, 4-pin	2, 3, 4, 5, 6, 8-pin	2-12 pin	4-5 pin
Current Rating	Up to 1A	1.5A - 3A per contact	0.5A - 4A	Up to 20A
Voltage Rating	50V	30-60V AC/DC	50V - 250V	Up to 250V
Data Transmission	Signal only	Up to 1 Gbps (SPE)	Up to 10 Gbps	Signal transmission
Primary Applications	Compact sensors, LED lighting	Industrial sensors, IoT devices	Industrial Ethernet, automation	Heavy-duty power transmission

Explore Solutions

M5 M8 M8 SPE M12 M23 Push-Pull Two-Piece

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M5 Connector

Advanced Pin Configurations - 2/3/4-pin options with A-Code keying system for secure and reliable connectivity
Versatile Form Factors - Male/female configurations available in straight and right-angle orientations
Flexible Mounting Solutions - Front-fastened, overmolded cable assemblies, PCB mount, and solder termination options
Superior Environmental Protection - IP67-rated waterproof and dustproof sealing for harsh operating environments
Space-Optimized Engineering - Ultra-compact M5 shell footprint designed for high-density applications
Extended Temperature Performance - Reliable operation from -20°C to +85°C ambient conditions

M8 Connector

International Standards Compliance - IEC 61076-2-104 certified with precision 8mm threaded coupling design
Superior Environmental Protection - IP67-rated sealing technology against dust, water ingress, and vibration
Comprehensive Termination Options - PCB mount, solder cup, and cable assembly configurations available
Advanced Cable Solutions - Overmolded assemblies and field-installable termination options
Flexible Pin Configurations - A-coded 2, 3, 4, 5, 6, and 8-pin variants for diverse applications
Robust Voltage Ratings - 30 VAC/DC to 50 VAC/60 VDC operational voltage range
High Current Capacity - 1.5A to 3A per contact current rating for power applications
Extended Temperature Range - -40°C to +85°C operational capability for extreme environments
T1 Industrial SPE - IEEE 802.3 SPE T1 compliant Single Pair Ethernet technology with integrated data and power transmission in a single cable, supporting data rates up to 1 Gbps

M12 Connector

Superior Environmental Protection - IP67-rated sealing technology for comprehensive dust and water resistance
High-Performance Electrical Specifications - Current range from 0.5A to 20A with voltage capability from 50V to 250V
Extended Temperature Performance - -40°C to +85°C operational capability for extreme industrial environments
High-Speed Data Transmission - Supports up to 10 Gb/s bandwidth for advanced communication applications
International Standards Compliance - IEC 61076-2 certified for harsh environment reliability and interoperability
Versatile Coding Options - A-coded, D-coded, and X-coded configurations for application-specific requirements
Two-Piece Modular Construction - IEC 61076-2-101 compliant modular design enabling flexible assembly and simplified maintenance procedures
Push-Pull Installation System - IEC 61076-2-010 certified tool-free quick-connect mechanism for rapid field deployment

M23 Connector

Superior Environmental Protection - IP67-rated sealing technology for comprehensive dust and water resistance
High-Power Transmission Capability - Up to 250V and 20A ratings optimized for demanding power transmission applications
Extended Temperature Performance - -20°C to +85°C operational capability for extreme industrial environments
Field-Installable Design - User-friendly installation system enabling flexible on-site assembly and configuration
Rugged Industrial Construction - Robust compact form factor engineered for superior durability in harsh environments
Industry-Standard Compatibility - Standards-compliant design ensures seamless integration across diverse system infrastructures

FAQs

What is the difference between M5, M8, M12, and M23 connectors, and how do I choose the right size?

The main differences lie in their size, pin configurations, and current/voltage capabilities. Each connector series is optimized for specific application requirements:

Compact Form Factor - M5 connectors offer ultra-compact design with 2-4 pins, ideal for space-constrained applications and high-density sensor installations
Versatile Performance - M8 connectors provide 2-8 pin configurations with 1.5-3A current rating, perfect for standard industrial sensors and actuators
High-Performance Solution - M12 connectors deliver 0.5-4A current range and up to 10 Gb/s data transmission, suitable for complex automation systems
Heavy-Duty Applications - M23 connectors support up to 250V/20A for demanding power transmission applications

What is SPE (Single Pair Ethernet) technology and what are its advantages in M8 connectors?

SPE (Single Pair Ethernet) is an advanced networking technology that transmits Ethernet data over a single pair of wires instead of traditional four-pair cables. Our 229B Series T1 Industrial SPE M8 connectors offer several key advantages:

Feature	Traditional Ethernet	SPE M8 Connector
Cable Requirements	Four twisted pairs (8 wires) in Cat5e/Cat6 cable	Single twisted pair (2 wires) with integrated power transmission
Data Transmission	Up to 10G Mbps standard rates PoE compliant up to 90W power delivery	Up to 1 Gbps data rates with IEEE 802.3 SPE T1 compliance Signal Pair up to 60W power delivery Power Pair up to 200W
Installation Benefits	Complex wiring with separate power and data cables Higher installation costs and time	Simplified single-cable installation Reduced wiring complexity and installation time Cost-effective solution for Industry 4.0 applications

What does IP67 rating mean and why is it important for industrial applications?

IP67 is an international protection rating that indicates the connector's ability to withstand harsh environmental conditions. This rating ensures reliable operation in demanding industrial environments:

Complete Dust Protection (IP6X) - Prevents all dust particles from entering the connector housing, ensuring consistent electrical performance
Water Immersion Protection (IPX7) - Withstands temporary immersion in water up to 1 meter depth for 30 minutes without damage
Harsh Environment Reliability - Maintains secure connections in manufacturing facilities with exposure to coolants, oils, and cleaning agents
Extended Service Life - Prevents contamination-related failures, reducing maintenance requirements and system downtime

Can these connectors operate in extreme temperature conditions?

All our metric circular connectors are engineered for extreme temperature performance with a wide operational range from -40°C to +85°C (-40°F to +185°F). This extended capability enables deployment across diverse environmental conditions:

Arctic Performance - Reliable operation in sub-zero temperatures for outdoor installations and cold storage facilities
High-Temperature Applications - Maintains electrical integrity in industrial ovens, automotive engines, and heat-generating machinery
Thermal Cycling Resistance - Advanced materials withstand repeated temperature variations without degradation
Global Deployment Capability - Suitable for installations from polar regions to desert climates without performance compromise

What are the advantages of M12 Push-Pull connector design?

ATTEND's M12 Push-Pull Type Connector System is a modern connectivity solution designed for quick, secure, and tool-free mating. This advanced mechanism offers significant advantages over traditional threaded connections:

Tool-Free Operation - Effortless insertion and release mechanism significantly reduces installation time while maintaining reliable connection
IEC 61076-2-010 Compliance - Ensures mechanical compatibility and global standardization for reliable interoperability
Versatile Configuration Options - Available in A-code (4, 5, 8, and 12-pin) and X-code (8-pin) configurations for diverse applications
Enhanced Productivity - Intuitive operation reduces installation errors and saves labor costs in high-volume installations
Wide Application Support - Supports power, signal, and high-speed data transmission across industrial automation systems

What are the benefits of M12 Two-Piece modular design?

The M12 Two-Piece Connector features a versatile modular design enabling effortless assembly and customizable pairing to meet diverse industrial requirements:

Modular Flexibility - Separable insert and housing components allow customizable configurations for specific application needs
Comprehensive Compatibility Tables - Detailed mating charts list insert part numbers, codings, contact numbers, and compatible housing types including Threaded Front Mount, Threaded Rear Mount, and Push-Pull Rear Mount
Diverse Cable Options - Compatible with overmolded, field-installable, and push-pull soldering cable assemblies for maximum installation flexibility
Cost-Effective Maintenance - Individual component serviceability reduces replacement costs and minimizes system downtime
Industry-Specific Applications - Ideal for industrial automation, rail transportation, and medical equipment requiring flexible assembly solutions