IEC 60115-9:2003

Overview

IEC 60115-9:2003 - Fixed Resistors for Use in Electronic Equipment, Part 9: Sectional Specification for Fixed Surface Mount Resistor Networks with Individually Measurable Resistors is an international standard developed by the International Electrotechnical Commission (IEC). This standard defines the preferred ratings, characteristics, quality assessment procedures, and test methods for fixed surface mount resistor networks that are used in the electronics industry. It serves as a key document for manufacturers, designers, and testing laboratories when selecting and evaluating these component types to ensure reliability and international compatibility.

Key Topics

• Preferred Ratings and Characteristics
  Describes the nominal values for resistance, tolerance, dissipation, limiting voltages, and insulation requirements for surface mount resistor networks.

  • Resistance ranges following IEC 60063 preferred numbers
  • Tolerances: ±5%, ±2%, ±1%, ±0.5%, ±0.25%, ±0.1%
  • Power ratings for networks and individual resistors
  • Limiting element voltages (25V, 50V, 100V, 200V)
  • Insulation resistance and voltage requirements
  • Climatic categories (temperatures from –55°C to +155°C)

• Design and Identification

  • Requirements for outline drawings, dimensions, and schematic diagrams for easy recognition and comparison
  • Marking guidelines for networks and packaging

• Performance and Testing

  • Prescribes quality assessment tests, such as resistance to soldering heat, overload, rapid temperature changes, endurance, shear, substrate bending, and damp heat steady-state tests
  • Detailed sample size and acceptance criteria for testing
  • Inspects conformance through periodic and lot-by-lot testing

• Quality Assessment

  • Qualification approval and quality conformance inspection procedures
  • Sample size definition and defect limits
  • Structurally similar component grouping for efficient testing

Applications

IEC 60115-9:2003 is widely applied in the production and quality assurance of surface mount resistor networks in:

• Consumer electronics
• Industrial automation systems
• Telecommunications devices
• Automotive electronics
• Medical devices
• Instrumentation and measurement equipment
• Computing and networking hardware

These surface mount resistor networks are crucial for applications requiring compact, reliable, and configurable resistor arrays, enabling efficient circuit designs and board layouts with individually measurable elements.

Employing this standard ensures:

• Reliable sourcing and interoperability of resistor networks from global suppliers
• Consistent performance in demanding environmental and electrical conditions
• Reduced risk of failure due to well-defined testing and acceptance criteria

Related Standards

To cover all aspects of resistor component selection and usage, consider referencing additional IEC standards such as:

• IEC 60115-1: Fixed resistors for use in electronic equipment - Part 1: Generic specification
• IEC 60063: Preferred number series for resistors and capacitors
• IEC 60068-1: Environmental testing - General and guidance
• IEC 60068-2-1/2: Environmental testing - Tests for cold and dry heat

These supporting documents provide the foundational and environmental testing requirements further referenced within IEC 60115-9:2003.

Keywords: IEC 60115-9:2003, surface mount resistor network, fixed resistors, quality assessment, electronic components, resistor specification, IEC standard, electronics manufacturing, resistor testing, performance requirements.