SIST EN 2240-049:2010

Overview

SIST EN 2240-049:2010 is a European standard established by CEN that specifies the required characteristics for incandescent lamps with code 757 designed for aerospace applications. It is part of the aerospace series of standards focusing on lamps and must be used in conjunction with EN 2756, which defines relevant test methods. This product standard ensures that lamps used in aviation and aerospace environments meet strict performance, safety, and dimensional criteria to comply with operational demands.

Developed under the Aerospace and Defence Industries Association of Europe (ASD-STAN), this standard applies across multiple member countries, harmonizing aerospace lamp specifications throughout Europe. Its detailed technical requirements support manufacturers, designers, and operators in selecting and verifying lamps that provide reliability and quality in critical aerospace systems.

Key Topics

• Scope and Application
  Specifies requirements exclusively for lamp code 757 used in aerospace electrical systems, ensuring compatibility and uniformity alongside EN 2756 test methods.

• Dimensions and Physical Characteristics
  Provides precise dimensions such as a typical Light Centre Length (LCL) of 16 ± 2 mm, nominal voltage of 28 V, nominal current of 0.08 A, and power rating of 2.24 W. Mass for 1,000 units is standardized at 2.25 kg.

• Electrical and Photometric Properties
  Defines nominal luminous flux at 7.8 lumens with a color temperature of 2100 K, focusing on performance under static direct current (DC) and alternating current (AC) conditions, with life expectancy parameters of 1,000 hours (DC static) and 1,500 hours (AC static).

• Filament Form and Cap Type
  Details filament form as C - 2F, as referenced in EN 2240-002, and specifies the lamp cap BA9s/14 per EN 2241, ensuring interchangeability and secure mechanical fit.

• Designation and Marking
  Provides guidelines for lamp identification including the international code marking on both the lamp and its packaging to maintain traceability and conformity.

Applications

SIST EN 2240-049:2010 lamps are primarily applied in:

• Aircraft Lighting Systems
  Used in cockpit, instrument, and cabin lighting where reliable incandescent lamps are essential for visibility and operational safety.

• Aerospace Electrical Equipment
  Integration in various control and signaling devices where specific electrical and luminous performance characteristics are required.

• Maintenance and Replacement Components
  Standardized lamp products simplify the management and procurement of replacement parts ensuring conformity with aerospace manufacturer specifications.

• Safety-Critical Environments
  Aerospace applications demanding rigorous compliance with product standards for safe and stable performance in varying electrical and environmental conditions.

Related Standards

For comprehensive aerospace lamp specification and testing, SIST EN 2240-049:2010 should be used alongside these related standards:

• EN 2756 – Aerospace series - Lamps, incandescent - Test methods: Defines the rigorous testing protocols applicable to lamps to verify compliance with performance criteria.

• EN 2240-001 – Aerospace series - Lamps, incandescent - Technical specification: Provides overall technical requirements applicable to incandescent aerospace lamps.

• EN 2240-002 – Aerospace series - Lamps, incandescent - Main characteristics: Details the principal features such as filament forms and lamp codes.

• EN 2241 – Aerospace series - Lamp caps - Dimensions: Specifies dimensional requirements of lamp caps to ensure mechanical compatibility.

By adhering to SIST EN 2240-049:2010, aerospace manufacturers and operators can assure that incandescent lamps meet stringent European safety and quality standards, sustaining high reliability and operational excellence in aerospace electrical systems. This standard supports consistency across the supply chain and enhances safety in critical aerospace lighting applications.