SIST EN 2240-075:2011

Overview

EN 2240-075:2011 is the CEN European product standard for the aerospace incandescent lamp, code 5448. Prepared by ASD-STAN and approved by CEN, this part of the EN 2240 series specifies the required characteristics to ensure interchangeability, performance and traceability of lamp code 5448 in aerospace applications. It is intended to be used together with EN 2756 (test methods) and the other EN 2240 parts.

Key Topics

• Electrical and photometric data: nominal voltage, current, power and luminous flux are specified to ensure predictable performance in aircraft lighting circuits.
• Mechanical dimensions and mass: light centre length (LCL), overall bulb form and mass data (mass given for 1 000 units) are defined for installation and procurement.
• Service life and operating modes: static and dynamic life figures for both d.c. and a.c. operation are included to guide maintenance cycles and spares planning.
• Filament and cap form: filament form and cap designation are given by reference to EN 2240-002 and EN 2241 respectively.
• Designation and marking: rules for product identification and marking on lamp and packaging reference EN 2240-002.

Key extracted characteristics (as published in EN 2240-075:2011):

• Nominal voltage: 28 V
• Nominal current: 0.41 A
• Nominal power: ~11.5 W (tolerance indicated in standard)
• Nominal luminous flux: ~160 lm (tolerance indicated in standard)
• Colour temperature: 2 775 K
• Life: static d.c. 1 000 h; dynamic d.c. 1 000 h; static a.c. 1 500 h
• Filament form: CC-6 (see EN 2240-002)
• Cap: BA9s/13 (see EN 2241)
• Light Centre Length (LCL): 15 ± 0.4 mm
• Mass: given as 2 kg for 1 000 units (reference table value)

(Values above are reported as given in the standard; consult the published EN 2240-075:2011 text for exact tolerances and figures.)

Applications

This standard supports practical activities across aerospace supply chains:

• Design integration: ensures lamp code 5448 meets electrical, mechanical and photometric requirements for cockpit, cabin or indicator applications.
• Procurement & sourcing: provides a clear specification for buyers and manufacturers to confirm part conformity and interchangeability.
• Maintenance & spares planning: life ratings and operating mode data help define replacement intervals and stocking levels.
• Testing & certification: intended to be used with EN 2756 test methods to verify conformity during incoming inspection and qualification.

Related Standards

• EN 2756 - Aerospace series - Lamps, incandescent - Test methods (use with EN 2240-075)
• EN 2240-001 - Technical specification for incandescent lamps in the EN 2240 series
• EN 2240-002 - Main characteristics (codes, marking and identity rules)
• EN 2241 - Lamp caps - Dimensions

For implementation, reference the full EN 2240-075:2011 document and the associated EN 2240 series parts and EN 2756 for testing procedures. Compliance ensures consistent performance, easier procurement and reliable in-service operation of lamp code 5448 in aerospace systems.