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 30V 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 (X-Code 50VAC／60VDC)	Up to 250V
Data Transmission	Signal only	Up to 1 Gbps (SPE)	Up to 10 Gbps (X-Code)	Signal transmission
Primary Applications	Compact sensors, LED lighting	Industrial sensors, IoT devices	Industrial Ethernet, automation	Heavy-duty power transmission

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

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M5 Connectors

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 - Varies by model, with selected configurations supporting −40°C to +85°C.

M8 Connectors and Cable Assemblies

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 for standard M8 configurations
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 and Cable Assemblies

Superior Environmental Protection - IP67-rated sealing technology for comprehensive dust and water resistance
High-Performance Electrical Specifications - Current range from 0.5A to 4A with voltage capability from 30V to 250V
Extended Temperature Performance - -40°C to +85°C operational capability for extreme industrial environments
High-Speed Data Transmission - Selected X-coded configurations support up to 10 Gb/s
International Standards Compliance - Designed to comply with applicable IEC 61076-2 standard
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 - Varies by model, with selected configurations supporting −40°C to +85°C.
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) transmits Ethernet data over a single twisted pair of wires, reducing cabling requirements compared with conventional multi-pair Ethernet configurations. ATTEND's 229B Series M8 SPE connectors support industrial Ethernet applications, with data rates and power capabilities varying by model and system configuration.

Feature	Traditional Ethernet	SPE M8 Connector
Cable Requirements	Typically two or four twisted pairs, depending on the Ethernet standard	One twisted pair for data transmission; selected hybrid configurations include additional power contacts
Data Transmission	Supports data rates up to 10 Gbps or higher, depending on the Ethernet standard	Up to 1 Gbps for applicable SPE configurations
Power Delivery	Power over Ethernet (PoE) is supported by compatible systems	Power over Data Lines (PoDL) for applicable SPE configurations; hybrid models provide dedicated power contacts
Installation Benefits	Established infrastructure with multiple cabling options	Reduced wiring complexity and compact connectivity for industrial devices

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?

ATTEND's metric circular connectors are designed for industrial applications with varying temperature requirements. Operating temperature ranges depend on the connector series and specific model, with selected configurations supporting temperatures from -40°C to +85°C.

Low-Temperature Applications - Selected models support operation down to -40°C for outdoor and cold-environment installations.
Industrial Operating Conditions - Connectors are available for applications requiring operation up to +85°C.
Model-Specific Specifications - Temperature ratings vary by product configuration and should be verified against the individual product specifications.
Application Flexibility - M5, M8, M12, and M23 connectors offer different configurations for industrial automation, sensors, and outdoor equipment.

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