IEC 60384-24:2015

Overview

IEC 60384-24:2015 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies requirements for fixed tantalum electrolytic surface mount capacitors with a conductive polymer solid electrolyte. These capacitors are primarily designed for use in DC (direct current) applications and are intended for integration into electronic equipment via surface mounting on printed circuit boards (PCBs) or substrates for hybrid circuits. This standard outlines preferred ratings, characteristics, quality assessment procedures, and the necessary tests and measurements to ensure component consistency, reliability, and performance. The 2015 edition aligns its structure with ISO/IEC Directives, eliminates contradictions and duplications, and includes the December 2016 corrigendum.

Key Topics

• Scope and Application
  Specifies fixed tantalum electrolytic surface mount capacitors with a polymer solid electrolyte for electronic equipment, clarifying that types with solid manganese dioxide electrolytes are covered by IEC 60384-3.

• Preferred Ratings and Characteristics

  • Capacitance values based on IEC 60063 E12 series
  • Capacitance tolerance from -20% to +20%
  • Rated voltage values from ISO 3 R10 and R20 series
  • Upper category temperatures of 105°C or 125°C; lower of -55°C
  • Surge voltage requirements and ratings

• Quality Assessment and Testing

  • Qualification approval procedures and lot testing
  • Quality conformance inspections
  • Test schedules, including endurance, climatic, and electrical tests
  • Methods for measuring capacitance, leakage current, and loss angle
  • Resistance to soldering heat, solderability checks, and marking durability tests

• Marking and Documentation

  • Essential information for marking capacitors and packaging (e.g., polarity, rated voltage, capacitance, manufacturer data)
  • Requirements for detail specifications, including dimensions, mounting instructions, and special characteristics

Applications

Fixed tantalum electrolytic surface mount capacitors with conductive polymer solid electrolyte, regulated by IEC 60384-24, are widely used in the manufacture and design of electronic circuits requiring reliable performance under varying electrical and environmental conditions. Specific application areas include:

• Consumer Electronics
  Used in smartphones, tablets, laptops, and other portable devices due to their compact size and enhanced stability.
• Telecommunications
  Integrated into network devices such as routers, switches, and mobile base stations, where surface mount technology (SMT) is standard.
• Industrial Control Equipment
  Embedded in automation, measurement, and monitoring systems requiring robust capacitors with excellent endurance.
• Automotive Electronics
  Increasingly used in car infotainment, ADAS, and power management systems for their reliability at high temperatures.
• Medical Devices
  Suited for electronic medical instruments demanding high reliability, stable capacitance, and strong resistance to harsh operating conditions.

Related Standards

The IEC 60384-24 standard is part of a broader family of international standards governing capacitors for electronic equipment. Related standards include:

• IEC 60384-1: Generic specification for fixed capacitors used in electronic equipment, providing common requirements and test methods.
• IEC 60384-3: Sectional specification for fixed tantalum electrolytic capacitors with solid (MnO₂) electrolyte.
• IEC 60063: Preferred number series for capacitors and resistors, guiding nominal values.
• IEC 60068-1: Environmental testing - General and guidance, detailing climatic categories and test conditions.
• IEC 61193-2: Quality assessment systems for selecting sampling plans for electronic components and packages.
• ISO 3: Preferred number series, referenced for standardizing voltage ratings.

By following IEC 60384-24:2015, manufacturers and engineers ensure that fixed tantalum electrolytic SMT capacitors meet stringent international criteria for reliability, safety, and interoperability, supporting high-quality assembly and operation in a broad range of electronic devices.