Circular connectors M8 / M12
in automation technology
Compact, robust, versatile.
Circular connectors as
Industry standard.
In modern automation and control systems, circular connectors play a key role. They reliably connect sensors, actuators, controllers, and power sources, and are internationally compatible due to their standardised designs (IEC 61076).
In particular, M8 and M12 connectors are considered the industry standard. Their robust construction, high protection ratings, and flexible coding make them ideal for harsh environments – from manufacturing halls to medical technology.
Advantages and benefits of
M8 / M12 circular connectors.
- Standardised interfaces for worldwide compatibility
- Compact designs for space-saving installations
- Diverse variants Signal, Data, Power, Hybrid
- High degrees of protection (IP67/IP69K) against moisture, dust and cleaning
- Reliable transmission of signals, data and energy
Variants according to IEC 61076
In detail.
M12 signal connectors
(IEC 61076-2-101)
The M12 signal connector is the standard solution for transmitting analogue and digital signals. It is available in various codings, such as A-coded for standard signals, B-coded for Profibus, or D-coded for Fast Ethernet up to 100 Mbit/s. Thanks to screw connections, the connectors are particularly robust and achieve protection ratings up to IP67/IP69K.
Typical applications: Sensors, actuators, control technology, fieldbus connections.
M8 connector
(IEC 61076-2-104)
M8 connectors are more compact than M12 variants, making them suitable for space-critical installations. They are frequently used with sensors and actuators and are also available in different codings. With protection ratings up to IP67, they are protected against dust and spray and are reliable even in harsh environments.
Typical applications: Mechanical engineering, production lines, automation systems.
M8 connector
(IEC 61076-2-104)
M8 connectors are more compact than M12 variants, making them suitable for space-critical installations. They are frequently used with sensors and actuators and are also available in different codings. With protection ratings up to IP67, they are protected against dust and spray and are reliable even in harsh environments.
Typical applications: Mechanical engineering, production lines, automation systems.
M5 connector
(IEC 61076-2-105)
The M5 connector is the smallest standardised design. It is used in applications where space is at a premium. These miniature connectors are used particularly in sensor technology, mobile devices and medical technology. Despite their size, they offer reliable signal transmission and protection ratings up to IP67.
Typical applications: mobile medical devices, miniature sensors, portable systems.
M12 data connectors
X-coded (IEC 61076-2-109)
The X-coded M12 connectors have been specially developed for data transmission at speeds of up to 10 Gbit/s and comply with the Ethernet standard. The coding separates the eight data lines into four pairs, which reduces electromagnetic interference. Thanks to their high robustness, they are the first choice for Industry 4.0, robotics and network technology.
Typical applications: Industrial Ethernet networks, high-speed data transmission, networked manufacturing plants.
M12 data connectors
X-coded (IEC 61076-2-109)
The X-coded M12 connectors have been specially developed for data transmission at speeds of up to 10 Gbit/s and comply with the Ethernet standard. The coding separates the eight data lines into four pairs, which reduces electromagnetic interference. Thanks to their high robustness, they are the first choice for Industry 4.0, robotics and network technology.
Typical applications: Industrial Ethernet networks, high-speed data transmission, networked manufacturing plants.
M12 push-pull
(IEC 61076-2-110 / -112)
Push-pull connectors enable tool-free rapid assembly. They click into place with an audible and tactile snap, saving assembly time, which is particularly advantageous for numerous connections or difficult-to-access locations. Available in both signal and data variants.
Typical applications: Plant engineering, robotics, machinery with limited installation space.
M12 Power connectors
(IEC 61076-2-111)
These connectors are designed for power transmission and can handle currents of up to 16 A and voltages of up to 630 V (depending on the coding, e.g. L, S or T coding). They are the ideal solution for motors, drives and decentralised power distribution systems in automation technology.
Typical applications: Motor control systems, power supply systems, drives.
M12 Power connectors
(IEC 61076-2-111)
These connectors are designed for power transmission and can handle currents of up to 16 A and voltages of up to 630 V (depending on the coding, e.g. L, S or T coding). They are the ideal solution for motors, drives and decentralised power distribution systems in automation technology.
Typical applications: Motor control systems, power supply systems, drives.
M12 hybrid connectors
Y-coded (IEC 61076-2-113)
Y-coded hybrid connectors enable the simultaneous transmission of power and data via a single connector. This saves space, reduces the number of connections and increases efficiency in modern automation and robotics applications.
Typical applications: Robotics, compact machines, Industry 4.0 systems.
Connection technology for various industries.
Industrial
Applications
- Communication between sensors and actuators
- Data transmission via Ethernet and fieldbus systems
- Power supply for engines and controls
- Robotics, conveyor and packaging technology
Medical technology
Applications
- Miniature sensors and diagnostic devices (M5, M8)
- Connections for imaging systems
- secure energy and signal connections in mobile devices
- Hygienic connectors for sensitive applications
Overview of the
Circular connectors M8 / M12
near Püblichhuisen.
Variant
Norm
Special features
Typical areas of application
Our Partners.
When it comes to distribution, we deliberately focus on a curated brand portfolio, reliably tested quality and in-depth technical expertise, ensuring that components are available quickly and integrate seamlessly into your applications. The range extends from connectors, crimp contacts and ferrule sleeves, through cable protection and marking, to fastening technology, assembly tools and interfaces for automation – all efficiently sourced from a single supplier and reliably implemented.
Our
Product catalogues.
All product catalogues, series overviews and data sheets from Püplichhuisen in one place – always up to date. With technical specifications, standards and ordering information as PDFs for direct download. Ideal for purchasing, development and production.
Your path to the partner for
Circular connector distribution.
Whether M5, M8 or M12 – signal, data, power or hybrid: at Püplichhuisen, you’ll find circular connectors compliant with IEC 61076 that meet the most demanding requirements in industry and medical technology!
All product groups.
Electronics
Connectors and
Connector
system
Connection systems for industrial automation, medical technology, measurement and control technology, automotive, etc.
- IDC connector technology, insulation displacement technology for fast, secure, and rational connection technology
- for ribbon cable technology with lateral entry
- for printed circuits
Cable tie
and fixing
elements
Cable ties and fasteners for various applications involving bundling, securing and labelling:
- UV- and weather-resistant
- halogen-free
- reversible
- UL and CSA approval, VG, MIL, and many more.
- heat-stabilised
- TEFZEL binders up to 260 °C
- EDGE CLIP for edge fastening
- Stainless steel cable ties with tensile strengths of up to 4,000 N
Crimp terminals
and connector
Cable lugs and connectors, both insulated and uninsulated, form part of our standard range.
- Ring shape in accordance with DIN 46234, pin shape in accordance with DIN 46230, fork shape
- Ring shape in accordance with DIN 46237, pin shape in accordance with DIN 46231, fork shape
- Butt, parallel and end connectors
Crimp contacts,
Connector
and casing
FAQ: Frequently Asked Questions
To circular connectors.
What is the difference between M8 and M12 connectors?
M8 is more compact and space-saving, while M12 is more robust and offers a wider variety of signal, data, and power options.
What codings are available for M12 connectors?
Depending on the application, there are various encodings: A- and B-encoded for signals, D-encoded for Fast Ethernet, X-encoded for high-speed data, Y-encoded for hybrid solutions, and L-, S-, and T-encoded for power applications.
Are round connectors waterproof?
Yes, most variants achieve IP67 or IP69K, making them protected against dust, spray water, and high-pressure cleaning.
What is the advantage of hybrid connectors?
They enable the simultaneous transmission of power and data through a single connector, saving on installation effort and space.
Can circular connectors also be used in medical technology?
Yes, especially the M5 and M8 are compact solutions for medical devices, diagnostic and sensor technology.