IEC 60115-2:2014

Overview

IEC 60115-2:2014 is an international standard published by the International Electrotechnical Commission (IEC) that specifies requirements for leaded fixed low-power film resistors used in electronic equipment. These resistors typically feature wire terminations and are intended for through-hole circuit board mounting. The standard defines preferred ratings, performance characteristics, test methods, and quality assessment procedures aligned with IEC 60115-1.

This edition introduces significant updates including conditions for lead-free soldering, a zero-defect quality approach, new product classifications, extended style and dimension lists, and additional tests such as electrostatic discharge (ESD), flammability, and endurance testing.

By adopting IEC 60115-2:2014, manufacturers and electronic component users can ensure high reliability and consistency in fixed low-power film resistors critical for electronic circuit performance and safety.

Key Topics

• Scope and Application: Defines leaded low-power film resistors for electronic use, covering metal film, metal oxide, metal glaze, and carbon film technologies.

• Product Classification: Introduces classification based on application requirements, with detailed style, dimension, and stability class definitions.

• Preferred Characteristics: Specifies climatic categories, resistance ranges, tolerances, rated dissipation, element voltage limits, insulation voltage and resistance.

• Testing Methods: Comprehensive tests include:

  • Lead-free soldering and soldering heat resistance
  • Rapid temperature change and endurance at various temperatures
  • Voltage proof and single pulse high-voltage overload
  • Vibration and moisture resistance tests
  • Flammability and electrostatic discharge (ESD) tests
  • Robustness of terminations and shear tests with new severity levels

• Quality Assessment Procedures: Defines assessment levels with a focus on the EZ level to meet zero-defect manufacturing, qualification approval, conformance inspections, and technology approval.

• Marking and Packaging: Guidelines for component and packaging markings ensure traceability and accurate specification communication, including provisions for 0-ohm resistors (jumpers) and radial formed styles.

Applications

IEC 60115-2:2014 applies widely in the design, manufacturing, and quality control of low-power fixed film resistors, which are essential components in:

• Consumer electronic devices requiring reliable resistor performance under varying temperature and environmental conditions.
• Industrial and automotive electronic equipment where stable resistance and durability against vibration, temperature cycling, and humidity are critical.
• Communication systems that demand resistors with tight tolerance and stability during soldering and long-term operation.
• Medical and measurement instruments requiring standardized resistor characteristics and assurance of quality through rigorous testing.
• Leaded through-hole assembly electronic products where compliance with lead-free soldering is mandatory.

The standard supports manufacturers in producing consistent, high-quality resistors that meet industry expectations for performance and safety, contributing to improved product reliability and lifecycle.

Related Standards

• IEC 60115-1: General requirements and measuring methods for fixed resistors-used as a foundation for the sectional specifications in IEC 60115-2.
• IEC 60068 series: Environmental testing protocols complementary to durability and climatic tests required by IEC 60115-2.
• IEC 60950: Safety standards for information technology equipment referencing resistor performance in safety circuits.
• RoHS Directive and Lead-Free Soldering Standards: Regulatory requirements for lead-free materials supported by IEC 60115-2 soldering and assessment procedures.
• ISO 9001: Quality management systems aligned with the quality assessment approaches promoted by this IEC standard.

By adhering to IEC 60115-2:2014 alongside these related standards, industry stakeholders can optimize fixed resistor reliability, environmental compliance, and manufacturing consistency essential for modern electronic equipment design and production.