This standard applies to all electrical and electronic devices whose terminals or integral mounting parts may be subject to stress during normal assembly or repair. GB/T 2423.29-1999 Environmental testing for electrical and electronic products Part 2: Test methods Test U: Strength of terminals and integral mounting parts GB/T2423.29-1999 Standard download decompression password: www.bzxz.net
This standard applies to all electrical and electronic devices whose terminals or integral mounting parts may be subject to stress during normal assembly or repair.

GB/T 2423.29---1999
This standard is equivalent to the International Electrotechnical Commission standard IEC68-2-21 "Basic environmental testing procedures Part 2: Test method Test U: Strength of lead terminals and integral mounting parts" 1983 4th edition and its 1985 1st amendment, 1991 2nd amendment and 1992 3rd amendment.
This standard is a revision of GB/T2423.29--1982 "Basic environmental testing procedures for electric and electronic products Test U: Strength of lead terminals and integral mounting parts". GB/T2423.29--1982 is equivalent to the international standard IEC68-2-21 1975 3rd edition and 1979 1st amendment and 1980 2nd amendment.
Other national standards cited in this standard are: GB/T2421--1999 Environmental testing for electric and electronic products Part 1 General rules (idtIEC68-1:1988) GB/T2423.28--1982 Basic environmental testing procedures for electric and electronic products Test T: Soldering test method (eqvIEC 68-2-20:1979)
GB/T2423.45--1997 Environmental testing for electric and electronic products Climatic sequence test (idtIEC68-2-61:1991) GB/T3102.3--1993 Mechanical quantities and units (eqvISO31-3:1992) This standard was first issued in 1982, revised for the first time in August 1999, and implemented on March 1, 2000. From the date of implementation of this standard, GB/T2423.29--1982 will be abolished at the same time. This standard is proposed by the Ministry of Information Industry of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Standardization of Environmental Conditions and Environmental Tests for Electrical and Electronic Products. The drafting unit of this standard is China Electronics Technology Standardization Institute. The main drafter of this standard is Han Ruifu. bzxZ.net
GB/T2423.29-1999
IEC Foreword
1) The formal resolutions or agreements of the International Electrotechnical Commission (IEC) on technical issues are formulated by technical committees participated by representatives of national committees that are particularly concerned about the issue. They express the international consensus on the issue as much as possible. 2) These resolutions or agreements are used internationally in the form of recommended standards and are accepted by national committees in this sense. 3) In order to promote international unification, the International Electrotechnical Commission hopes that all member countries will adopt the contents of the International Electrotechnical Commission's recommended standards as their national standards when formulating national standards as long as the specific conditions of the country permit. Any differences between the International Electrotechnical Commission's recommended standards and national standards should be clearly stated in the national standards as much as possible. This standard was formulated by the 50th Technical Committee (Environmental Testing) of the International Electrotechnical Commission. Other IEC standards cited in this standard:
IEC68-1 "Basic environmental testing procedures - Part 1: General principles and guidelines"Other standards cited in this standard:
ISO 31/Ⅱ
"Mechanical quantities and units"
1 Scope
National Standard of the People's Republic of China
Environmental testing for
electric and.electronic products-Part 2 :Test methods-
Test U. Robustness of terminations andintegral mounting devices
GB/T 2423.29--1999
idt IEC 68-2-21: 1992
Replaces GB/T2423.29--1982
This standard applies to all electrical and electronic components whose terminals or integral mounting parts may be subjected to stress during normal assembly or repair.
2 Test Ua1: Tensile test (applicable to all types of terminals) 2.1 Purpose
Determine the ability of the terminals and the connection between the terminals and the test sample body to withstand axial tension during normal assembly or repair. 2.2 General description of test Ua1
Fix the test sample body so that its terminals are in the normal position, and apply tension to the terminals axially and in the direction away from the test sample body.
The tension should be applied gradually (without any impact) and then maintained for 10 s±1 s. 2.3 Pretreatment
The pretreatment method should be in accordance with the provisions of the relevant specifications. 2.4 Initial inspection
The test sample shall be subjected to visual inspection and measurement of electrical and mechanical properties in accordance with the requirements of the relevant specifications. 2.5 Test method (see Figure 1a))
2.5.1 Application
This test is applicable to all types of lead-out terminals. Except for test samples with more than three lead-out terminals, the relevant specifications shall specify the number of lead-out terminals to be tested for each test sample, and the test shall be carried out on all lead-out terminals. It shall be ensured that all lead-out terminals of the test sample have the same probability of being tested.
2.5.2 Test procedure
Fix the main body of the test sample so that its lead-out terminals are in the normal position, and apply the tensile force specified in Table 1 to the lead-out terminals along the auxiliary direction and in the direction away from the main body of the test sample. The tensile force shall be applied gradually (without any impact) and then maintained for 10s±1s. Value of applied tensile force:
a) Linear lead-out terminal (circular cross-section or strip) or plug Approved by the State Administration of Quality and Technical Supervision on August 2, 1999 and implemented on March 1, 2000
The value of applied tensile force shall comply with the provisions of Table 1. GB/T 2423.29--1999
Note: For test samples with oversized linear lead-out terminals, the value of applied tensile force shall be specified in the relevant specifications. a) Test Uai—Tensile test
b) Test Ua2
Schematic diagram showing the direction of force application with arrows Table 1
Nominal cross-sectional area, mm2
0.05S≤0.1
0.2S≤0.5
0. 5
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