DIN EN 60068-2-14 / VDE 0468-2-14:2010-04

• Describes test methods for devices and components at changing temperatures

• Aims to evaluate the functionality under thermal cycling loads

• Includes various test sequences: Na, Nb, Nc

• Takes into account the material, weight and design of the test specimen

• Updated version includes new example curves and specified tolerances

• Focuses on the interaction between test specimen and test parameters

• Used for the development, validation and quality assurance of electrotechnical products

Content, scope of application and tests:

The standard DIN EN 60068-2-14 is part of the IEC 60068 series and deals with test methods for devices and components that are exposed to changing temperatures. The scope covers situations in which electrotechnical products are subject to temperature changes during operation, transportation or storage.

The main purpose of the standard is to evaluate the functionality and performance of test specimens when exposed to different temperatures. This is done to ensure that the tested objects retain their functionality and do not exhibit any significant electrical, mechanical or physical changes.

The standard provides for different test sequences, referred to as Na, Nb and Nc. These sequences take into account different scenarios and requirements for the thermal cycling test. When performing the tests, factors such as the amplitude and frequency of temperature changes and the rate of change play an important role. The standard provides explanations for selecting suitable severity levels based on these parameters.

A special focus is placed on the test specimen itself. The standard takes into account that different materials, weights and designs can lead to different heating and cooling behavior. This is important because each test item reacts individually to the test conditions and may exhibit different wear processes or damage mechanisms.

To carry out the tests, sensors can be attached to various points on the test specimen. This enables detailed measurement and live logging of the test behavior. In addition, cameras can be used in the test room to provide visual data for evaluation. The updated version of the standard contains new sample curves and more specific tolerances for the temperature levels. These additions improve the comparability of the tests and enable a more precise evaluation of the test results.

The documentation of the tests is an important aspect of the standard. The revised version contains updated requirements for test reports for the Na and Nb tests, ensuring standardized and comprehensive reporting of the tests performed and their results. The DIN EN 60068-2-14 standard is primarily used for the development, validation and quality assurance of electrotechnical products. It is used both for the approval of components and for detecting and tracing the causes and mechanisms of damage.

Alternative standards with similar content and scope of application:

1. DIN EN IEC 60068-2-1: Testing at low temperature (“cold”)

2. DIN EN IEC 60068-2-2: Testing at high temperature

3. DIN EN IEC 60068-2-30: Damp heat, cyclic

4. DIN EN IEC 60068-2-38: Composite temperature/humidity test, cyclic

5. DIN EN IEC 60068-2-78: Moist heat, constant