binder: M12 Solutions and 7/8″ Connectors – Miniaturisation in Power and Voltage Supply
August 5, 2025
M12 Solutions Increasingly Used in Smaller Machines – 7/8″ Connectors Remain Essential for Existing Systems
As modern machinery continues to shrink in size, the demand grows for powerful yet compact connectors. binder meets this need with its M12 Power connectors, which transmit high voltages reliably in space-critical environments. Due to changing application requirements, these connectors are increasingly replacing traditional 7/8″ connectors. However, the latter continue to play a crucial role—especially in legacy systems.
“With increasing decentralization, device designs are becoming smaller and more compact—large machine layouts must be avoided. As a result, modern machines and control systems require components that are both space-saving and high-performing. This includes connectors, which must also be compact,” explains Ron Hautzinger, Product Manager at binder.
These trends are driving demand for M12 connectors, as they are particularly small and powerful. They flexibly adapt to the evolving needs of the automation industry.
Strong Connections in Compact Designs
M12 connectors have become a standard for signal, data, and power transmission. Their compact design allows them to fit into tight spaces while still supporting voltages of up to 630 V. Since M12 connectors are widely recognized as a standard, they are easy to assemble in the field and integrate into machines.
Thanks to standardized codings—such as S, T, K, and L—these connectors offer not only safe but also precise solutions for a wide range of applications. For instance, S and K codings are typically used in AC applications, while T and L codings are optimized for DC power. This differentiated coding ensures high safety and flexibility across various system types.
Ron Hautzinger states: “M12 Power connectors are highly versatile in power applications—from AC motors and frequency converters to LED lighting and network devices. They are ideal for providing a stable power supply within the familiar M12 form factor.”
With its M12-S, M12-K, M12-T, and M12-L series, binder offers a wide range of configuration options.
7/8-Inch Connectors Deliver Power in Legacy Systems
While M12 solutions are increasingly used in modern, space-critical machines, 7/8″ connectors remain essential in existing systems. These connectors were specifically developed for high-voltage and high-power transmission and are known for their robust construction—making them ideal for applications where larger components are appropriate.
“In the USA, 7/8″ connectors are still the standard, as the trend toward miniaturization is less pronounced there. For applications in older systems or in areas where the larger form factor is not a drawback, 7/8-inch connectors continue to be the right solution,” says Ron Hautzinger.
binder thus offers solutions for both worlds: M12 Power connectors are compact and powerful, while 7/8″ connectors deliver proven reliability in existing systems. This allows automation professionals to respond flexibly to the needs of both modern and legacy infrastructure.
The product portfolios include solutions with 3 to 5 pins (depending on coding), comply with protection class IP67 or IP68 and meet UL standards (UL2237 & UL2238). They have a mechanical service life of more than 100 mating cycles and are suitable for operating temperatures from -40 °C to +85 °C.
Accessories and Adapters for Seamless Integration Between M12 and 7/8″
To better integrate modern and legacy technologies, binder has developed an expanded range of accessories and practical interconnection solutions. These address both the trend toward more compact M12 Power connectors and the continued relevance of 7/8″ components.
New to the portfolio is a redesigned 7/8″ T-splitter available in three versions — 3-, 4-, and 5-pin. It was specifically designed for building high-performance networks in existing systems and offers simplified installation thanks to integrated mounting holes. This new version replaces the previous model.
Also new is a 5-pin T-splitter with L-coding, designed to meet the requirements of modern DC applications in the M12 format. Its compact design makes it particularly suitable for efficient and structured power distribution in space-constrained environments.
Another highlight includes two newly developed adapter solutions that enable intelligent connections between 7/8″ and L-coded connectors. These adapters support the gradual modernization of existing systems and the flexible implementation of hybrid system architectures. All products are available immediately.
The technical specifications vary between the different series, but all offer reliable and secure connections.
- binder series: 813, 814, 820, 823, 824, and 870
- Coding: K, L, S, T, and 7/8″
- Pins: 3 to 5, depending on coding
- Protection class: IP67 or IP68
- Mechanical durability: >100 mating cycles
- Operating temperature range: -40 °C to +85 °C
- UL standards compliance: UL2237 & UL2238
