IEC 60384-22:2024

Overview

IEC 60384-22:2024 is the IEC sectional specification for fixed surface mount multilayer capacitors (SMD multilayer ceramic capacitors) of ceramic dielectric, Class 2. It applies to fixed, unencapsulated surface-mount multilayer capacitors with metallized connecting pads or soldering strips intended for mounting on printed circuit boards or directly onto substrates for hybrid circuits. Capacitors specifically for electromagnetic interference suppression are excluded (see IEC 60384-14). The document defines preferred ratings and characteristics, selected quality assessment procedures, tests and measuring methods (referencing IEC 60384-1:2021), and general performance requirements.

Key topics and technical requirements

• Preferred ratings and characteristics: rated temperature, rated and category voltages, preferred nominal capacitance values, tolerances and dimensions.
• Electrical tests and measurements: capacitance, tangent of loss angle (tan δ), insulation resistance, voltage proof; optional impedance and ESR tests if required by detail specifications.
• Mechanical and thermal tests: shear test, substrate bending test (including deflection D for very robust designs), resistance to soldering heat, solderability, rapid temperature change, climatic sequence, damp heat (steady state and accelerated), endurance.
• Quality and inspection: visual examination, measurement procedures, special preconditioning and recovery requirements; Annex D provides normative quality conformance inspection and a new Clause D.5 (test schedule for quality conformance inspection).
• Marking and documentation: marking on body and packaging, information to include in detail specifications (outline drawings, mounting, ratings).
• Normative annex changes: Annex C (temperature characteristics for reference 25 °C) made normative; 25 °C reference temperature added across multiple tables; standard restructured to ISO/IEC Directives, Part 2.

Practical applications

• Use for specifying and verifying SMD multilayer ceramic capacitors, Class 2, in electronic equipment where stable capacitance and defined electrical/thermal/mechanical robustness are required.
• Applicable for components mounted on PCBs or hybrid circuit substrates in consumer electronics, instrumentation, and other electronic assemblies where surface-mount ceramic capacitors are used.
• Guides test labs and manufacturers on sampling, test severities, acceptance criteria and conformance for product release and qualification.

Who should use this standard

• Capacitor manufacturers preparing detail specifications and production test procedures.
• Test laboratories performing conformity and qualification testing.
• Component engineers and PCB designers who need to specify reliable SMD ceramic capacitors.
• Procurement and quality managers responsible for supplier acceptance, inspection and documentation.

Related standards

• IEC 60384-1:2021 - general requirements and test methods referenced by this sectional specification.
• IEC 60384-14 - fixed capacitors for electromagnetic interference suppression (excluded from Part 22).

Keywords: IEC 60384-22:2024, fixed surface mount multilayer capacitors, SMD multilayer ceramic capacitors, Class 2, capacitor tests, quality conformance, temperature characteristics, solderability, substrate bending.