GB/T 2423.60-2008 English PDF (GBT2423.60-2008)

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GB/T 2423.60-2008: Environmental testing - Part 2: Test methods - Test U: Robustness of terminations and integral mounting devices
GB/T 2423.60-2008
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
K 04
GB/T 2423.60-2008 / IEC 60068-2-21:2006
Environmental testing for electric and electronic products -
Part 2: Test methods - Test U: Robustness of terminations
and integral mounting devices
(IEC 60068-2-21:2006, Environmental testing - Part 2-21: Tests - Test U:
Robustness of terminations and integral mounting devices, IDT)
ISSUED ON: DECEMBER 30, 2008
IMPLEMENTED ON: NOVEMBER 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Test Ua1: tensile ... 5 
4 Test Ua2: thrust ... 7 
5 Test Ub: bending ... 9 
6 Test Uc: torsion ... 14 
7 Test Ud: torque ... 15 
8 Test Ue: robustness of terminations for SMD in the mounted state ... 17 
Annex NA (informative) Parts of GB/T 2423 ... 32 
Bibliography... 36 
Foreword
See Annex NA for the parts of GB/T 2423 “Environmental testing for electric and
electronic products - Part 2: Test methods”.
This Part is Part 60 of GB/T 2423.
This Part identically adopts IEC 60068-2-21:2006 “Environmental testing - Part 2-21:
Tests - Test U: Robustness of terminations and integral mounting devices” (English
version). It only made the following editorial modifications:
- modified “this Part of IEC 60068” to “this Part of GB/T 2423” or “this Part”;
- used decimal point "." to replace comma "," that is used as decimal point;
- deleted the foreword of the international standard;
- added the informative Annex NA.
Annex A, Annex NA of this Part are informative.
This Standard was proposed by and shall be under the jurisdiction of National Technical
Committee on Environmental Conditions and Environmental Tests of Electrical and
Electronic Products of Standardization Administration of China (SAC/TC 8).
Main drafting organizations of this Standard: Guangzhou University, Fifth Electronics
Research Institute of the Ministry of Information Industry, Shanghai Institute of Quality
Inspection Technology, Suzhou General Test Instrument Factory.
Main drafters of this Standard: Xu Zhonggen, Ji Chunyang, Lu Zhaoming, Xu Liyi,
Zhang Guoming, Yang Chuan.
Environmental testing for electric and electronic products -
Part 2: Test methods - Test U: Robustness of terminations
and integral mounting devices
1 Scope
This Part of GB/T 2423 is applicable to all electrical and electronic components whose
terminations or integral mounting devices are liable to be submitted to stresses during
normal assembly or handling operations.
Table 1 provides details of the applicable tests.
2 Normative references
The provisions in following documents become the provisions of this Part of GB/T
2423 through reference in this Part. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Part, however, parties who
reach an agreement based on this Part are encouraged to study if the latest versions of
these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 2421.1, Environmental Testing for Electric and Electronic products - General
and Guidance (GB/T 2424.1-2008, IEC 60068-1:1988, IDT)
GB/T 2423.28-2005, Basic environmental testing procedures for electric and
electronic products - Part2: Test methods - Test T: Soldering (IEC 60068-2-20:1979,
IDT)
GB/T 2423.45, Environmental testing - Part 2: Test methods - Test Z/ABDM:
Climatic sequence (GB/T 2423.45-1997, idt IEC 60068-2-61:1991)
GB/T 19247.2, Printed board assemblies - Part 2: Sectional specification -
Requirements for surface mount soldered assemblies (GB/T 19247.2-2003, IEC
61191-2:1998, IDT)
IEC 60068-2-58:2004, Environmental testing - Part 2-58: Tests - Test Td - Test
methods for solderability, resistance to dissolution of metallization and to soldering
heat of surface mounting devices (SMD)
IEC 61249-2-7:2002, Materials for printed boards and other interconnecting
structures - Part 2-7: Reinforced base materials clad and unclad - Epoxide woven
E-glass laminated sheet of defined flammability (vertical burning test), copper-clad
IEC 61188-5 (all parts), Printed boards and printed board assemblies - Design and
use
IEC 61190-1-2:2002, Attachment materials for electronic assembly - Part 1-2:
Requirements for soldering pastes for high quality interconnections in electronics
assembly
ISO 272, Fasteners - Hexagon products - Widths across flats
ISO 9453, Soft solder alloys - Chemical compositions and forms
3 Test Ua1: tensile
This test is applicable to all types of terminations.
3.1 Object
The purpose of this test is to verify that the terminations and attachment of the
terminations to the body of the component will withstand such axial stresses as are
likely to be applied during normal assembly or handling operations.
3.2 General description
With the termination in its normal position and the component held by its body, a force
is applied to the termination in the direction of its axis and acting in a direction away
from the body of the component. The force shall be applied progressively (without any
shock) and then maintained for a period of 10 s ± 1 s.
3.3 Preconditioning
The method of preconditioning shall be as prescribed in the relevant specification.
3.4 Initial measurements