IEC 60384-21-1:2004

Overview

IEC 60384-21-1:2004 is a blank detail specification for fixed surface mount multilayer capacitors of ceramic dielectric, Class 1, at assessment level EZ. It is a supplementary document to the IEC sectional and generic specifications and defines the required style, layout and minimum content for national or vendor detail specifications. Detail specifications that do not follow this blank template may not be considered compliant with IEC requirements. This edition incorporates the September 2004 corrigendum.

Key Topics and Requirements

• Structure and content requirements: Specifies what information must appear in a detail specification (identification, outline drawing, application group, reference data).
• General data: Sections for recommended mounting methods, dimensions and case-size tables, rated capacitance ranges, tolerance, rated and category voltages, climatic/category temperatures, temperature coefficient and loss tangent.
• Marking & ordering information: Minimum marking and order-entry items (e.g., rated capacitance, tolerance, rated DC voltage, temperature coefficient and detail-specification reference).
• Inspection and quality conformance: Includes an inspection framework and a detailed test schedule (Table 4) covering lot-by-lot and periodic checks:
  • Group A (lot-by-lot): capacitance, tan δ (loss angle), insulation resistance, voltage proof.
  • Group B (lot-by-lot): solderability, visual inspection, solvent resistance, temperature coefficient and cyclic drift.
  • Group C (periodic): robustness of termination, resistance to soldering heat, substrate deflection/bending, mounting and functional checks.
• Sampling & procedures: References IEC sampling plans and prescribes qualification and conformance procedures (sampling, periodicity, severities, pass/fail criteria).
• Normative references: Cross-references IEC 60384-1, IEC 60384-21, and IEC 60410 among others.

Applications and Who Uses It

• Capacitor manufacturers use this template to prepare compliant detail specifications for Class 1 MLCC (multilayer ceramic chip capacitors) intended for surface-mount applications.
• Component engineers and procurement teams use the standardized detail to compare parts, verify ordering codes, and ensure interchangeability.
• Quality assurance and test laboratories follow the inspection and test-schedule requirements for lot acceptance and periodic audits.
• Standards bodies and national committees adapt the blank specification when publishing national or vendor-specific detail specifications that must align with IEC practice.

Related Standards

• IEC 60384-1: Generic specification for fixed capacitors
• IEC 60384-21: Sectional specification for fixed SMD multilayer ceramic capacitors, Class 1
• IEC 60410: Sampling plans and procedures for inspection by attributes
• Related parts in the 60384 series (for other capacitor types and assessment levels)

Keywords: IEC 60384-21-1, fixed surface mount multilayer capacitors, ceramic dielectric Class 1, blank detail specification, assessment level EZ, quality conformance inspection, test schedule, capacitor dimensions, marking and ordering.