EN3155 Contacts: The Benchmark for Your Aerospace Harnesses

Shaping Tomorrow’s Electrical Connectivity

As aircraft become ever more digital and electrical loads soar, overall performance can hinge on just a few milliohms. EN3155 crimp contacts, qualified for circular connectors EN 3645 / MIL-DTL-38999 and rectangular connectors EN 3545 / EN 4165, are the European benchmark for high-reliability civil and military applications.

EN3155-019F2022

Standards & Qualification

  • 85 approved part numbers cover signal, power, coax/twinax and quadrax versions.
  • The AECMA qualification program tests pull-out strength after crimping, random vibration up to 35 grms, 500 h salt-spray corrosion, and RTCA DO-160 retention and electrical stability.
  • The process ensures that a contact purchased in twenty years will perform exactly like one delivered today.
     

Why Choose EN3155 ?

  • Operating Temperature : Reliability in Any Climate
    Conforming to the four standard thermal classes—P 125 °C, R 150 °C, S 200 °C and T 260 °C—our contacts maintain full performance from –65 °C to +200 °C with no derating. This range comfortably covers the harshest locations: engine bays, APUs and ECS ducting.
  • Sizes & Inserts : Built-in Versatility
    Contacts are available in sizes 22D, 22, 20HD, 20, 16 and 12. They fit directly into EN 3645, EN 3545 and EN 4165 inserts with no mechanical modification—an undeniable advantage on the production line.
  • Materials & Plating
    Standard bodies are machined from high-conductivity copper alloy; a lightweight variant uses passivated Al Mg Si 0.7, reducing mass by up to 40 %. The specified finish is nickel ≥ 1 µm plus gold 1.27 µm (optional 2.54 µm), giving 500 h salt-spray resistance.
  • Instant Identification
    Dual epoxy color bands encode size and gender; legibility remains flawless after 1 000 mating cycles and exposure to common solvents.
     


Whether you face extreme temperatures, tight integration constraints or intensive duty cycles, EN 3155 contacts combine avionics-grade performance with straightforward implementation—ideal for your most critical projects.
 

EN3155-066F0810

 

Domains & Applications

  • Size / Variant    Typical Use-Cases
  • 22 / 20 (Signal)    ARINC 429, CAN, Ethernet, sensor networks
  • 16 / 12 (Power)    28 V dc power chains, starter-generator converters, galley power-lines
  • Coax / Quadrax (Size 8)    Radar links, HD-video, high-speed data
  • Aluminium “L-Weight”    Composite-structure harnesses, weight-critical systems, HALE drones

Adopting EN3155 contacts from Air Cost Control secures electrical continuity across your programmes while optimising weight, cost and lead time—an established solution for the next generation of aircraft.

 

Beyond Components: Expert Support on Demand

Back to news