SIST EN 2240-035:2010

SIST EN 2240-035:2010 is the Slovenian adoption of EN 2240-035:2010 for aerospace incandescent lamps. It specifies the required characteristics for lamp, code 387, and is intended to be used together with EN 2756 for test methods.

What does SIST EN 2240-035:2010 specify?

SIST EN 2240-035:2010 defines the product standard for lamp, code 387, used in aerospace applications. It sets the lamp's required characteristics and points to companion documents for tests, main characteristics, filament form, cap dimensions and the technical specification.

The document is organized into clauses 1 to 6:

• Scope
• Normative references
• Required characteristics
• Designation
• Marking
• Technical specification

This structure matters in practice because it separates the product definition from the supporting documents that are needed to identify, test and specify the lamp correctly.

What are the key requirements of SIST EN 2240-035:2010?

Clause 3 is the core of SIST EN 2240-035:2010. It defines the lamp's physical, electrical and identification characteristics, so suppliers and buyers can check that a lamp offered as code 387 matches the agreed product definition.

Clause 3.1 - dimensions and mass

SIST EN 2240-035:2010 gives the lamp's dimensions and mass by reference to Figure 1 and Table 1, with dimensions in millimetres. In practice, this is the basis for fit, interchangeability and incoming inspection.

Clause 3.2 - other characteristics

SIST EN 2240-035:2010 uses Table 1 for the lamp's main operating characteristics, including its electrical ratings, luminous output, colour temperature and service life. For users, this is the key comparison point when qualifying a lamp for a given aerospace application.

Clause 3.3 - filament form

SIST EN 2240-035:2010 refers the filament form to EN 2240-002. That means the lamp code alone is not enough - the filament form must also follow the companion standard, which matters when matching performance and interchangeability.

Clause 3.4 - cap

SIST EN 2240-035:2010 assigns cap SX6s and refers cap dimensions to EN 2241. In practice, this controls mechanical compatibility with the holder or socket.

Clause 4 - designation

SIST EN 2240-035:2010 gives a designation format with a description block and an identity block, using EN2240-387 as the identity block. It also notes that code I9005 may be inserted if needed. This helps purchasing, drawing notes and cataloguing.

Clause 5 - marking

SIST EN 2240-035:2010 requires the lamp and its packaging to be marked with the international code number as indicated in EN 2240-002, unless space is insufficient. That supports traceability and correct identification in storage and use.

Clause 6 - technical specification

SIST EN 2240-035:2010 directs the reader to EN 2240-001 for the technical specification. This keeps the product standard focused on the lamp code while the broader technical framework stays in the companion document.

What terms does SIST EN 2240-035:2010 define?

• Light Centre Length (LCL) - The lamp dimension that locates the light centre, important for correct positioning in a fixture.
• d.c. - Direct current; the standard uses this when stating some life ratings.
• a.c. - Alternating current; the standard uses this when stating other life ratings.
• SX6s - The cap designation assigned to this lamp code, used for mechanical compatibility.
• Description block - The text part of the designation that names the product as a lamp, incandescent.
• Identity block - The coded part of the designation that identifies the lamp standard and code.
• Code 387 - The lamp code covered by this product standard.

Who uses SIST EN 2240-035:2010?

SIST EN 2240-035:2010 is used by aerospace lamp manufacturers, component suppliers, test laboratories, quality managers and buyers. They use it to specify, manufacture, verify, mark and procure lamp, code 387, against the same product definition.

It is also relevant in design and certification work where a lamp's size, cap, designation and required characteristics must be checked against a defined aerospace product standard.

Which standards are used with SIST EN 2240-035:2010?

• EN 2756 - Provides the test methods used with this product standard.
• EN 2240-001 - Gives the technical specification referred to in clause 6.
• EN 2240-002 - Gives the main characteristics and the filament form reference, and supports the marking code.
• EN 2241 - Gives the cap dimensions for SX6s.

What does the SIST EN 2240-035:2010 document contain?

SIST EN 2240-035:2010 contains one dimensional figure for bulb appearance and one characteristics table covering the lamp's main rated data. It also includes a designation example, a marking rule and references to the companion standards needed to use the product standard correctly.

For implementation work, the document is mainly a product definition and identification document. The detailed test methods come from EN 2756, while the other companion standards cover the lamp's broader technical specification, main characteristics and cap dimensions.