IEC 60068-2-82:2007

Overview

IEC 60068-2-82:2007 is an international environmental testing standard that specifies whisker test methods (Test XW1) for finished electric and electronic components with tin or tin-alloy finishes. It defines test equipment, specimen preparation, test schedules and observation/measurement procedures to assess spontaneous metallic protrusions ("whiskers") that can grow during storage or use. The standard does not cover whisker formation caused by external mechanical stress. Test severities and acceptance criteria are intended to be transferred by a relevant component or application specification.

Key topics and technical requirements

• Scope and applicability: Focus on components at the finished stage with tin or tin-alloy platings; other parts may be tested only if material systems and growth mechanisms are comparable.
• Test methods: Includes ambient, damp heat and temperature cycling test methods for inducing and evaluating whisker growth.
• Test equipment: Specifies required equipment such as desiccators, humidity chambers (per IEC 60068-2-78), thermal cycling chambers (per IEC 60068-2-14), optical microscopes, scanning electron microscopes (SEM) and fixing jigs.
• Specimen handling and preconditioning: Guidance on storage prior to testing, soldering simulation, heat preconditioning and lead forming.
• Test schedule and reporting: Procedures include initial measurement, test exposure, recovery, intermediate/final assessment and minimum test report requirements.
• Measurement and evaluation: Annexes provide a normative method to measure whisker length and informative guidance with examples (filament, column, kinked, spiral whiskers) and acceptance guidance.
• Normative references: Integrates related IEC documents (e.g., IEC 60068-1, IEC 60068-2-14, IEC 60068-2-78, IEC 60068-2-58, IEC 61192-3, IEC 61760-1).

Practical applications and users

IEC 60068-2-82 is used by:

• Component manufacturers validating tin/tin-alloy finishes for reliability and release criteria.
• Reliability engineers and qualification labs performing environmental testing to characterize whisker risk.
• OEMs (aerospace, automotive, defence, telecom, consumer electronics) specifying acceptance criteria in component or application specifications.
• Procurement and compliance teams verifying supplier test evidence for tin-plated components.

Practical benefits include improved failure-risk assessment for electrical shorts, clearer test transfer between specs, and standardized measurement of whisker growth for comparability across suppliers and industries.

Related standards

• IEC 60068-1 (General guidance)
• IEC 60068-2-14 (Temperature change/cycling)
• IEC 60068-2-78 (Damp heat)
• IEC 60068-2-58 (Solderability and soldering heat)
• IEC 61192-3, IEC 61760-1 (Workmanship and SMD specification)

Keywords: IEC 60068-2-82:2007, whisker test methods, tin whiskers, environmental testing, electronic components, humidity chamber, thermal cycling, SEM.