EN 129102:1994

Overview

EN 129102:1994 (adopted as SIST EN 129102:2002) is a blank detail specification for wirewound surface mounting inductors of assessed quality (assessment level P). Issued under the CLC framework and classified under ICS 31.220.99 (other electromechanical components), this document provides a standardized template that manufacturers, designers and purchasers can use to define product-specific requirements for wirewound SMD inductors. As a blank specification, it does not fix a single component design but establishes the structure and fields for contractual and technical detail.

Key Topics

The standard organizes the technical and quality requirements that typically need to be defined for wirewound SMD inductors at assessment level P. Topics covered or expected in the blank detail specification include:

• Product identification fields: part number, style, dimensional drawings and footprints
• Electrical characteristics: inductance range, tolerance, rated current, DC resistance, self-resonant frequency (SRF) - placeholders for supplier-specified values
• Mechanical and dimensional requirements: package sizes, lead/termination types, height and tolerance classes
• Materials and construction: core and winding materials, insulation and termination finishes (placeholders to specify materials)
• Environmental and thermal limits: operating temperature range, storage conditions, thermal derating guidance
• Reliability and quality assessment: assessment level P acceptance criteria, sampling plans, and conformity declarations (template for specifying tests and limits)
• Test and inspection requirements: solderability, electrical testing, mechanical inspection and endurance cycles (fields to list required standards and test methods)
• Marking, packaging and documentation: labeling, traceability, packing methods and delivery documentation

Applications

This blank detail specification is practical for:

• Component manufacturers creating datasheets and quality declarations for wirewound SMD inductors
• Electronic component purchasers and OEM procurement teams who need a precise template to request and accept assessed-quality inductors
• Design and reliability engineers who must specify component-level requirements for power supplies, filtering, EMI suppression and other inductive functions in SMT assemblies
• Test laboratories and quality auditors who evaluate conformity to customer-defined technical and assessment-level requirements

Related Standards

• Identical to EN 129102:1994 and published nationally as SIST EN 129102:2002.
• Related to other standards covering SMD passive components, solderability, and environmental/testing procedures (refer to applicable IEC/CENELEC documents when specifying test methods).

Keywords: EN 129102, wirewound surface mounting inductors, assessment level P, blank detail specification, SMD inductors, assessed quality, CLC, inductors specification.