Maxnetic® Connector Technology
Mill-Max Innovation
Built on decades of precision-machined interconnect expertise, Maxnetic® connectors integrate Mill-Max spring-loaded pin reliability with robust magnetic coupling.
Key Design Features:
- Spring-loaded and target pin construction maintains consistent, low-resistance contact over millions of cycles.
- Gold-plated components ensure corrosion resistance and optimal conductivity.
- Polarized neodymium magnets provide strong holding force and automatic alignment.
- Self-location and zero-force mating reduce user error and mechanical stress.
- Durable housing options: available in shrouded and unshrouded formats for application flexibility.
Performance Highlights:
- Current ratings up to 7.2 amps per pin (4 mm series)
- Contact resistance as low as 20–25 milliohms
- Cycle life up to 1,000,000 cycles
- Reliable operation across temperatures up to +80°C
Termination and Configuration Options
Termination Styles
Maxnetic® connectors are offered in solder tail, solder cup, through-hole, and surface-mount options to suit various design requirements.
Mounting and Pitch Options
Maxnetic® connectors are available in two distinct pitch formats to suit different design and performance needs:
4 mm Pitch (0.1575”) – Series 878/879
Designed for applications requiring higher current handling, these connectors support up to 7.2 A per pin and offer pin-to-pin spacing of 4.0 mm. Available in 2 to 6 positions, they come in single row configurations with multiple termination options, including solder cup, through-hole, and surface mount (SMT). Both shrouded and non-shrouded variants are available to support board-to-board, cable-to-board, or cable-to-cable layouts.
- Spring-Loaded Connectors: 878-22-00X, 879-22-00X series
- Target Connectors: 878-20-00X, 879-20-00X series
Find out more about 4 mm-pitch product options.
.100" Pitch (2.54 mm) – Series 872–875
This tighter pitch option enables lower-profile interconnects, ideal for compact designs. Available in 2 to 10 positions (single row) and 4 to 10 positions (double row), these connectors are offered with solder tail or solder cup terminations. With a current rating of up to 5.2 A per pin, they provide a balanced solution for both signal and power delivery in space-constrained environments.
- Spring-Loaded Connectors: 872-22-0XX, 873-22-0XX, 874-22-0XX, 875-22-0XX
- Target Connectors: 872-10-0XX, 873-10-0XX, 874-10-0XX, 875-10-0XX
A full product matrix for .100” products — including diagrams, part numbers, and compatibility — is available in this specification sheet.
Modular Flexibility
Each spring-loaded connector can mate with any corresponding target connector to create board-to-board, cable-to-board, or cable-to-cable configurations.
Each connector system includes spring-loaded and target pairs, supporting reliable magnetic self-alignment and zero-force mating. Depending on application needs, designers can mix and match male/female and spring-loaded/target halves, with or without shrouds, to create the ideal interconnect setup.
You can also explore available assemblies via the links below:
Maxnetic® connectors deliver the best of both worlds: magnetic alignment for intuitive, zero-force engagement and spring-loaded contacts for durable, high-reliability electrical connections.
The polarized neodymium magnets guide the mating halves into position, ensuring precise alignment even in blind or constrained conditions. Once mated, spring-loaded pins provide consistent contact force and superior conductivity across thousands of cycles.
This dual-action design reduces mechanical wear, simplifies user interaction, and ensures a secure, repeatable connection — making it ideal for rugged, high-use applications in medical, industrial, and military environments. This engineering notebook takes a tour of the major considerations when employing magnetic-and-spring-loaded connections inside high-performance electronic designs.
Advantages of Magnetic Connectors
Maxnetic® connectors are engineered for zero-force magnetic mating, allowing users to establish a secure electrical connection without applying pressure. This stress-free engagement is particularly useful in tight spaces, wear-sensitive assemblies, or applications requiring frequent connections and disconnections.
Blind Mating
The connectors self-align using polarized neodymium magnets combined with mechanical body features. This ensures reliable mating even in blind or awkward orientations — minimizing user error and reducing connection time in field or production environments.
Durability
Built for high durability, these connectors are rated for up to one million mating cycles without degradation in electrical performance. That resilience is backed by precision-machined construction from Mill-Max to ensure mechanical integrity and consistent contact force over time.
Compactness
Despite their robustness, Maxnetic® connectors maintain a low-profile stack height — as low as 10.9 mm — making them a compact solution for space-constrained designs. Each contact is capable of handling up to 5.2 A*, delivering strong performance for power and signal applications alike.
Design Flexibility
Engineers can choose from multiple configurations including single- and double-row options, with both solder tail and solder cup terminations available to match a variety of assembly requirements.
*Current rating based on individual pin in free air. Actual performance may vary by configuration.
Need technical help or looking for a custom design? Contact us or review our custom capabilities.