IEC 60115-8:2023

Overview

IEC 60115-8:2023 is the International Electrotechnical Commission (IEC) standard defining specifications for fixed surface mount resistors (SMD resistors) used in electronic equipment. It sets the preferred ratings, characteristics, and testing procedures for these resistors, which are critical components mounted directly onto printed circuit boards (PCBs). This edition aligns with the latest product technology definitions as per IEC 60115-1:2020 and introduces new resistor styles, revised test board configurations, and updated test methods to reflect current market demands. The standard ensures reliability, safety, and performance consistency in fixed surface mount resistors utilized globally across electronics industries.

Key Topics

• Product Scope and Classification
  Covers fixed surface mount resistors categorized by geometric shapes (rectangular, transverse, cylindrical, wire-wound) and dimensions, as well as metallized termination types tailored for PCB mounting.

• Preferred Characteristics
  Details preferred styles and dimensions, resistance value ranges, tolerance classes, rated power dissipation, limiting element voltage, insulation voltage, and insulation resistance.

• Test Methods and Severities
  Defines comprehensive test procedures including:

  • Resistance measurement and temperature coefficient assessment
  • Temperature rise and endurance tests under rated and elevated temperatures
  • Overload and high-voltage pulse endurance
  • Electrostatic discharge (ESD) resistance
  • Mechanical stress tests such as shock, vibration, substrate bending, and shear tests
  • Environmental tests including damp heat, thermal cycling, and rapid temperature changes
  • Solderability evaluations with lead-free and SnPb soldering
  • Flammability and visual examinations to assess quality and safety

• Quality Assessment Procedures
  Implements standardized quality checks throughout component manufacturing stages, including qualification approval, capability certification, and periodic evaluations to maintain compliance with performance and safety benchmarks.

• Updates and Innovations in 2023 Edition
  Introduction of transverse (RT) resistor styles with wide terminals suited to modern market needs. Enhanced test board designs allowing vertical mounting optimize temperature stability during testing. Incorporates periodic-pulse high-voltage overload testing into default routines while retaining legacy tests for historical product types.

Applications

Fixed surface mount resistors compliant with IEC 60115-8:2023 are essential in diverse electronic devices and systems, including:

• Consumer electronics such as smartphones, laptops, and wearables
• Automotive electronic systems requiring robust temperature and mechanical resistance
• Industrial equipment and control systems with stringent safety and performance standards
• Medical devices where precision and reliability are critical
• Telecommunications and data communication devices necessitating stable resistance under varied environmental stresses

This standard enables manufacturers and engineers to select and verify surface mount resistors that meet global quality expectations, ensuring consistent operation across temperature extremes and electrical load conditions.

Related Standards

• IEC 60115-1:2020 – Generic specification for fixed resistors, providing overarching definitions, classifications, and common quality assessment procedures referenced in IEC 60115-8.
• IEC 60068 Series – Environmental testing standards referenced for various mechanical and climatic test conditions.
• IECQ Standards – Quality assessment and certification schemes relevant to manufacturing and qualification approval of electronic components.
• RoHS and REACH Directives – Compliance frameworks ensuring environmental safety for materials used in resistor manufacture and termination processes.

Adhering to IEC 60115-8:2023 supports integration with these related standards, facilitating harmonized component selection and manufacturing processes in line with global electronics manufacturing best practices.