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Deutsch: Micro-D / Español: Micro-D / Português: Micro-D / Français: Micro-D / Italiano: Micro-D

Micro-D refers to a type of miniature electrical connector used in the space industry and other high-reliability applications. These connectors are designed to meet stringent requirements for size, weight, and performance, making them ideal for use in spacecraft, satellites, and other aerospace systems where space and weight constraints are critical.


Micro-D connectors are a family of small, high-density connectors that are specifically engineered to provide reliable electrical connections in harsh environments. They are known for their compact size, robust construction, and ability to withstand extreme conditions such as high vibration, temperature variations, and exposure to radiation. The "D" in Micro-D refers to the D-shaped metal shell that helps ensure proper alignment and secure mating of the connectors.

These connectors are typically used in applications where space is at a premium and where reliable performance is crucial. Their design often includes features such as:

  • Miniature Size: Micro-D connectors are significantly smaller than standard connectors, making them suitable for densely packed electronic systems.
  • High-Density Contact Arrangements: They can accommodate a large number of contacts within a small footprint, allowing for efficient signal and power transmission.
  • Durability: Constructed from high-quality materials, they are resistant to corrosion, mechanical stress, and other environmental factors.
  • Secure Locking Mechanisms: Ensures that connections remain stable and secure under conditions of high vibration and mechanical shock.

Special Considerations

When using Micro-D connectors in the space industry, several factors must be considered:

  • Qualification and Testing: Connectors must be rigorously tested and qualified to meet the demanding requirements of space missions.
  • Material Selection: Materials used must be able to withstand the harsh conditions of space, including radiation and extreme temperatures.
  • Reliability: Ensuring long-term reliability is essential, as failures in electrical connections can jeopardize entire missions.

Application Areas

  1. Satellites: Used for interconnecting various electronic systems within satellites, including power distribution and data transmission.
  2. Spacecraft: Essential for connecting onboard instruments, communication systems, and control systems in spacecraft.
  3. Launch Vehicles: Employed in the avionics and guidance systems of rockets and launch vehicles.
  4. Robotics: Used in space robotics, including robotic arms and exploration rovers, for reliable electrical connections.
  5. Scientific Instruments: Connects sensors and instruments used in scientific experiments conducted in space.

Well-Known Examples

  • International Space Station (ISS): Utilizes Micro-D connectors in various systems, including communication and control.
  • Mars Rovers: Micro-D connectors are used in the wiring and electronic systems of Mars rovers like Curiosity and Perseverance.
  • CubeSats: These small satellites rely on Micro-D connectors for their compact and efficient electronic designs.
  • NASA's Orion Spacecraft: Employs Micro-D connectors in its avionics and electronic systems for deep space missions.

Treatment and Risks

Handling and integrating Micro-D connectors involve addressing potential risks and ensuring proper treatment:

  • Assembly and Handling: Careful assembly and handling are required to avoid damage to the delicate contacts and ensure proper mating.
  • Environmental Testing: Extensive testing under simulated space conditions is necessary to validate performance and reliability.
  • Maintenance and Inspection: Regular inspection and maintenance can help identify potential issues before they lead to failures.

Similar Terms

  1. Nano-D Connectors: Even smaller than Micro-D, these connectors are used in applications where size constraints are even more stringent.
  2. D-Subminiature Connectors: Larger than Micro-D, these connectors are also used in various electronic applications, including aerospace.
  3. MIL-Spec Connectors: Military specification connectors designed for high-reliability applications, including aerospace and defense.


Micro-D connectors are miniature, high-density electrical connectors widely used in the space industry for their reliability, compact size, and durability. They are essential for ensuring stable and secure electrical connections in satellites, spacecraft, launch vehicles, and space robotics. With their ability to withstand the harsh conditions of space, Micro-D connectors play a crucial role in the success of various space missions and applications.


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