SIST EN 2349-415:2009

Overview

EN 2349-415:2007 - part of the Aerospace series - specifies a standardized acceleration test method for verifying the ability of relays and contactors to withstand steady-state acceleration. Intended to be used together with EN 2349-100 (General requirements), this CEN standard defines mounting, procedural and performance checks to ensure reliable contact operation under acceleration loads typical of aerospace environments.

Keywords: EN 2349-415:2007, acceleration test, relays, contactors, aerospace, steady-state acceleration, ISO 2669, test procedures

Key topics and requirements

• Scope: Method for checking capability of relays and contactors to withstand acceleration. Used in conjunction with EN 2349-100.
• Reference method: The acceleration test follows clause 3.2 (“Steady state acceleration”) of ISO 2669 (Environmental tests for aircraft equipment).
• Mounting and wiring:
  • Mounting must be rigid so acceleration transmits directly to the device without absorption or resonance.
  • Electrical connections must follow the product standard; wires should be secured to the accelerator as close as possible to the electrical connection point.
• Performance limits (contact behavior during test):
  • No opening of closed contacts longer than 10 µs.
  • No closing of open contacts longer than 1 µs.
• Complementary tests: After acceleration testing, devices shall be checked in accordance with other parts of the EN 2349 series as applicable:
  • EN 2349-301 (Pick‑up and drop‑out voltage)
  • EN 2349-303 (Dielectric strength)
  • EN 2349-304 (Operate and release time)
  • EN 2349-305 (Bounce time)
  • EN 2349-307 (Contact voltage drop)
  • EN 2349-309 (Exported spikes)

Applications and users

• Who uses it:
  • Aerospace relay and contactor manufacturers for design validation and production testing.
  • Independent test laboratories performing environmental qualification for aerospace components.
  • Systems engineers, procurement and certification authorities ensuring component robustness for aircraft and spacecraft electrical systems.
• Practical value:
  • Ensures electromechanical switches maintain contact integrity under steady acceleration loads encountered in flight, launch and maneuvering environments.
  • Helps reduce in-service failures caused by acceleration-induced contact disturbances and resonance.

Related standards

• EN 2349-100 (General requirements) - mandatory companion document.
• ISO 2669 - defines steady-state acceleration environmental test method referenced by EN 2349-415.
• Other EN 2349 parts listed above for post-test functional verification.

This standard is essential for anyone specifying, testing or qualifying aerospace relays and contactors for reliable performance under acceleration.