IEC 60068-2-27:2008

Overview

IEC 60068-2-27:2008 is a globally recognized standard published by the International Electrotechnical Commission (IEC) that specifies test procedures for environmental shock testing. This part of IEC 60068 focuses on Test Ea and provides guidance on evaluating the ability of electrical and electronic components-referred to as specimens-to withstand shocks that occur during handling, transportation, and operation. The aim is to identify mechanical weaknesses, potential damage, or performance degradation caused by non-repetitive or repetitive shock events.

This standard applies particularly to unpackaged specimens and products including their transport packaging when considered part of the test specimen. It complements related standards such as IEC 60068-2-47, which addresses mounting for vibration and impact testing, and offers a framework for selecting standardized shock pulses designed to simulate real-world conditions. The standard includes detailed pulse shape definitions and guidance for proper selection and implementation.

Key Topics

• Purpose and Scope
  IEC 60068-2-27 defines procedures for shock testing designed to reveal structural integrity issues and degradation in electrical/electronic specimens subjected to mechanical shocks. Tests assess the specimen’s resistance to sudden acceleration forces, mimicking transport or operational shock events.

• Test Specimen Definition
  The standard distinguishes between unpackaged test specimens and packaged products with their transport packs, allowing testing either way based on the practical scenario.

• Shock Pulse Shapes and Severities
  Prescribed shock pulse shapes, such as half-sine, trapezoidal, and saw-tooth pulses, are standardized within the document. Annexes provide in-depth guidance on pulse selection to replicate actual environmental or operational conditions and illustrate typical severities used across industries.

• Test Setup and Mounting
  Specimens are mounted on shock test machines or fixtures during testing to ensure reproducibility and accurate simulation of shock effects. The standard references IEC 60068-2-47 for mounting methods to ensure consistency and reliability.

• Integration with Other Standards
  It merges the earlier IEC 60068-2-29 shock test protocols and introduces provisions for soft-packaged specimens following international working group recommendations.

Applications

IEC 60068-2-27:2008 shock testing is widely applied in industries dealing with electrotechnical products, where mechanical shock resistance is critical for:

• Transportation Testing
  Ensuring products maintain structural integrity and functionality despite shocks encountered during shipping, handling, and unloading processes.

• Quality Control
  Verifying that design specifications and manufacturing quality standards are met for shock resistance, reducing failure rates in the field.

• Design Validation
  Testing prototypes and final products to assess robustness under expected operational shock conditions, helping engineers refine design durability.

• Packaging Evaluation
  When used alongside IEC 60068-2-47, it helps verify the effectiveness of packaging in protecting products from shock during transit.

• Safety and Compliance
  Supporting compliance with international regulatory frameworks by providing a benchmark shock resistance standard, which enhances product reliability and consumer safety.

Related Standards

• IEC 60068-1: Environmental Testing – General and Guidance
  Provides foundational principles applicable to all test procedures in the IEC 60068 series, including shock tests.

• IEC 60068-2-47: Tests – Mounting of Specimens
  Specifies mounting methods for specimens during dynamic tests such as shock and vibration to ensure reproducibility and valid results.

• IEC 60068-2-55: Tests – Test Ee and Guidance: Bounce
  Addresses bounce tests which are complementary to shock tests in simulating mechanical stress.

• IEC 60721 Series: Classification of Environmental Conditions
  Provides classifications for different environmental parameters and severities relevant to storage, transportation, and ground vehicle installations, thus informing the test severities in IEC 60068-2-27.

Conclusion

IEC 60068-2-27:2008 is a fundamental standard for environmental shock testing of electrotechnical products. Its rigorous test methods, detailed guidance on pulse selection, and integration with related standards make it essential for manufacturers, quality engineers, and design teams aiming to ensure product durability against mechanical shocks. Adhering to this standard helps enhance product reliability, optimize packaging, and meet international quality and safety expectations.