Magnetic Breakaway Electrical Connectors for Defence and Rugged Systems

Magnetic breakaway connectors are increasingly used in defence and ruggedised electrical systems where cables are exposed to movement, snagging, and repeated connection cycles.

In vehicle-mounted and body-worn systems specifically, connectors are routinely subjected to rapid connection and disconnection, often in constrained spaces. With limited dexterity and dynamic loading during movement or dismount, connector behaviour during separation is not just a usability consideration, it becomes a system reliability concern and a safety issue too.

A closer look at dismount and movement

In defence applications, electrical systems often interface between vehicle power and data networks, soldier-worn equipment, and mission-critical subsystems.

Typical entry, exit or repositioning can often cause any of the following:

• Snagging on seating or equipment
• Sudden tensile or angular loading
• Disconnection while power/data is active

Traditional connector designs are not optimised for these events, which is why magnetic breakaway connectors are so crucial for system and mission integrity.

Breakaway connectors avoid damage to connectors and cable assemblies and avoid contact degradation from repeated uncontrolled separation. There’s also a safety concern to consider, with difficult breakaway putting personnel and hardware at risk of arcing or transient electrical effects, as well as delaying dismount.

Designing a connector that remains secure during normal operation but separates predictably under abnormal load remains a difficult engineering problem, but one that we believe can be solved with our range of breakaway connectors.

Why magnetic breakaway is the answer

Magnetic breakaway connectors offer clear and distinct advantages, including:

• Self-aligning connection in low-visibility conditions
• No mechanical latching mechanisms to wear or jam
• Rapid disconnection under load or tension
• Low-profile form factors suitable for body-worn integration

However, many magnetic connectors are designed primarily for ease of use, and not controlled electrical behaviour under load. This conventional approach, while convenient, doesn’t take into account the power and data requirements of modern day mission requirements.

Engineers will typically rely on cable routing and strain relief, retained or locking connectors, or simply accepting that cables and connectors are sacrificial. While these approaches help, they don’t define what actually happens when something snags.

Connectors must be more predictable in practice

Challenges will always exist in modern systems and operational environments, but connector behaviour can be influenced by factors that are difficult to predict or fully replicate in testing – particularly as mission critical environments change and evolve. In simple terms, connector performance observed in controlled test conditions may not fully reflect behaviour in service.

Our real-world research so far has demonstrated some common themes:

• Personnel are working with limited visibility during connection and disconnection
• Gloves and other bodyworn hardware can significantly limit dexterity
• Constrained vehicle interiors can limit cable routing options
• Loads applied during movement and dismount vary greatly

The answer: Breakaway connectors with real-world functionality

Introducing Stingray

Magnetic breakaway connectors for rugged integration

The Stingray connector series has been developed for defence and high-reliability applications, particularly where connectors are integrated into:

• Body-worn soldier systems
• Crew station interfaces
• Vehicle-to-soldier power and data connections

It is specifically intended for environments where connectors are exposed to repeated movement, handling, and abnormal loading during use.

Key technical characteristics

• Magnetic coupling with 360° connection interface
• No moving parts or mechanical latching mechanisms
• Compact, low-profile form factor for wearable systems
• High mating cycle durability (<10,000 cycles)
• EMI shielding and environmental sealing
• Power and data transmission capability (e.g. USB 2.0)

These features support:

• Fast, intuitive connection under operational conditions
• Reduced mechanical wear over repeated cycles
• Reliable performance in harsh environments

While Stingray provides robust magnetic coupling and mechanical breakaway behaviour, controlled electrical separation under load is an active area of development.

Our engineering team are currently working on the management of contact behaviour during live disconnection and reducing electrical stress and transient effects.

The initial goal is to improve repeatability of separation characteristics during disconnection during vehicle exit, while improving overall system reliability and safety. Our overall goal is to introduce predictable failure behaviour on repeated disconnections.

When to consider a magnetic breakaway connector like Stingray

Magnetic breakaway electrical connectors are commonly evaluated for:

• Vehicle-to-soldier power and data interfaces
• Crew station and mounted system connections
• Dismount systems and wearable electronics
• Robotics and unmanned ground systems
• Harsh environment industrial platforms

A magnetic breakaway solution may be appropriate where systems involve:

• Frequent connection/disconnection cycles
• Risk of snagging during movement or dismount
• Operation under vibration, shock, or constrained conditions
• Limited user dexterity (eg: gloves, low visibility)
• Requirements for predictable failure behaviour

Discuss your application with us

If you are working on a defence or ruggedised system where connector behaviour under load is a concern, it is worth addressing early in the design process.

We are actively working with engineering teams to broaden our understanding of dismount and snagging scenarios and how vehicles and wearable systems may present constraints.

We would also like to understand any specific requirements you may have around controlled separation under load.