EN 2349-414:2007

Overview

EN 2349-414:2007 is a CEN European aerospace standard in the EN 2349 series that defines a method to verify the ability of relays and contactors to withstand mechanical shock. Intended to be used together with EN 2349-100 (General requirements), this part prescribes mounting, test procedure references and pass/fail criteria for shock resistance. The shock test procedure is performed in accordance with ISO 7137 and the applicable product-level conditions specified in the relevant EN 2349 product standard.

Key topics and requirements

• Scope: Method for checking capability of relays and contactors to withstand mechanical shock; used with EN 2349-100.
• Mounting: Test samples must be rigidly mounted on a drop slide so shock transmits directly without absorption or resonance. Electrical leads must be wired per the product standard and secured close to the connection point.
• Test method: Shock testing carried out per ISO 7137; exact test severity and conditions are taken from the applicable product standard.
• Performance limits during shock:
  • Torque for connections and attachments must be at least 80% of rated value after test.
  • No unintended contact behaviour exceeding time limits:
    • No opening of closed contacts for longer than 10 µs.
    • No closing of open contacts for longer than 1 µs.
• Post-shock verification: Functional checks are required in accordance with other EN 2349 parts (pick-up/drop-out, dielectric strength, operate/release time, bounce time, contact voltage drop, exported spikes, seal) to confirm continued compliance.

Applications and users

This standard is practical for:

• Aerospace component manufacturers and design engineers validating relay and contactor shock resistance.
• Environmental and qualification test laboratories performing mechanical shock testing on aerospace electrical components.
• Systems integrators and procurement teams requiring specification-compliant parts for aircraft and space platforms.
• Certification authorities and quality assurance teams verifying that relay/contactor hardware meets aerospace shock performance requirements.

Keywords: EN 2349-414, mechanical shock testing, aerospace relays, contactors, ISO 7137, relay shock test, contactor shock resistance, EN 2349 series.

Related standards

• EN 2349-100 - General requirements (use together with Part 414)
• ISO 7137 - Aircraft environmental conditions and test procedures for airborne equipment (shock method reference)
• Other EN 2349 parts referenced for verification: EN 2349-301, -303, -304, -305, -307, -309, -412

This standard provides a concise, testable framework to ensure relays and contactors maintain electrical and mechanical integrity under mechanical shock in aerospace environments.