{"id":380850,"date":"2024-10-20T03:08:46","date_gmt":"2024-10-20T03:08:46","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-60068-2-212021\/"},"modified":"2024-10-26T05:41:48","modified_gmt":"2024-10-26T05:41:48","slug":"bs-en-iec-60068-2-212021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-60068-2-212021\/","title":{"rendered":"BS EN IEC 60068-2-21:2021"},"content":{"rendered":"

This part of IEC 60068 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 and is also applicable to surface mount devices (SMDs).<\/p>\n

The recommended test methods suitable for specific terminations\/lead of devices are shown in Table 1.<\/p>\n

Table 1 \u2013 Selection of test methods suitable for specific terminations\/leads<\/b><\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
7<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
10<\/td>\nFOREWORD <\/td>\n<\/tr>\n
12<\/td>\n1 Scope
2 Normative references
Tables
Table 1 \u2013 Selection of test methods suitable for specific terminations\/leads <\/td>\n<\/tr>\n
13<\/td>\n3 Terms and definitions
4 Tests Ua: Robustness of terminals against axial stresses
4.1 Object
4.2 Application
4.3 General description
4.4 Preconditioning
4.5 Initial measurements <\/td>\n<\/tr>\n
14<\/td>\n4.6 Test procedures
4.6.1 Test Ua1: Tensile
Figures
Figure 1 \u2013 Direction of the applied pull force Fp in test Ua1 <\/td>\n<\/tr>\n
15<\/td>\n4.6.2 Test Ua2: Thrust
Figure 2 \u2013 Direction of the applied thrust Ft in test Ua2
Table 2 \u2013 Value of applied pull force for test Ua1 <\/td>\n<\/tr>\n
16<\/td>\n4.7 Final measurements
4.8 Information to be given in the relevant specification
5 Tests Ub: Robustness of terminals against bending stresses
5.1 Object
Table 3 \u2013 Value of applied thrust for test Ua2 <\/td>\n<\/tr>\n
17<\/td>\n5.2 Application
5.2.1 General
5.2.2 Pliable terminations
5.2.3 Rigid and all other terminations
Figure 3 \u2013 Displacement of pliable lead wires in test Ub <\/td>\n<\/tr>\n
18<\/td>\n5.3 General description
Figure 4 \u2013 Bending force applied to a specimen with non-pliable terminations
Table 4 \u2013 Value of applied force for test Ub <\/td>\n<\/tr>\n
19<\/td>\n5.4 Preconditioning
5.5 Initial measurements
5.6 Test procedures
5.6.1 Test Ub1 (for wire and strip terminations) <\/td>\n<\/tr>\n
20<\/td>\nFigure 5 \u2013 Sequential test procedure of test Ub, Method 1 <\/td>\n<\/tr>\n
21<\/td>\n5.6.2 Test Ub2 (for tag terminations)
Figure 6 \u2013 Sequential test procedure of test Ub, Methods 2 and 3 <\/td>\n<\/tr>\n
22<\/td>\n5.6.3 Test Ub3 Simultaneous bending
5.7 Final measurements
5.8 Information to be given in the relevant specification
Figure 7 \u2013 Clamp for the testing of short terminations <\/td>\n<\/tr>\n
23<\/td>\n6 Test Uc: Torsion
6.1 Object
6.2 Application
6.3 General description
6.4 Preparation of the specimen
6.5 Initial measurements
Figure 8 \u2013 Preparatory bending of a lead wire for test Uc <\/td>\n<\/tr>\n
24<\/td>\n6.6 Test procedure
Figure 9 \u2013 Torsion test method 1: Rotation of clamped specimen body <\/td>\n<\/tr>\n
25<\/td>\n6.7 Final measurements
6.8 Information to be given in the relevant specification
7 Test Ud: Torque
7.1 Object
7.2 Application
Figure 10 \u2013 Torsion test method 2: Rotation of clamped other lead wire <\/td>\n<\/tr>\n
26<\/td>\n7.3 General description
7.4 Preconditioning
7.5 Initial measurements
7.6 Test procedure
7.6.1 Terminations with threaded studs or screws
Table 5 \u2013 Torque severity <\/td>\n<\/tr>\n
27<\/td>\nFigure 11 \u2013 Assembly for the torque test applied to a threaded stud
Figure 12 \u2013 Preparation of a threaded termination for the torque test <\/td>\n<\/tr>\n
28<\/td>\n7.6.2 Other test configurations
7.7 Final measurements
7.8 Information to be given in the relevant specification
Figure 13 \u2013 Assembly for the torque test applied to an embedded nut <\/td>\n<\/tr>\n
29<\/td>\n8 Test Ue: Robustness of terminations for SMD in the mounted state
8.1 Object
8.2 Application
8.3 Substrate for test method Ue <\/td>\n<\/tr>\n
30<\/td>\nFigure 14 \u2013 Example of substrate for test method Ue <\/td>\n<\/tr>\n
31<\/td>\n8.4 Mounting
8.4.1 Dimensions
8.4.2 Possible mounting methods
8.4.3 Mounting method for substrate bending, pull-off, push-off and shear <\/td>\n<\/tr>\n
32<\/td>\n8.5 Preconditioning
8.6 Initial measurements
8.7 Test methods
8.7.1 Test Ue1: Substrate bending test <\/td>\n<\/tr>\n
33<\/td>\n8.7.2 Test Ue2: Pull-off and push-off test
Figure 15 \u2013 Substrate bending test <\/td>\n<\/tr>\n
34<\/td>\nFigure 16 \u2013 Test Ue2, pull-off test <\/td>\n<\/tr>\n
35<\/td>\n8.7.3 Test Ue3: Shear test
Figure 17 \u2013 Test Ue2, push-off test <\/td>\n<\/tr>\n
36<\/td>\nFigure 18 \u2013 Test Ue3, shear test <\/td>\n<\/tr>\n
37<\/td>\n8.8 Final measurements
8.8.1 Recovery
8.8.2 Visual examination of terminations
8.8.3 Electrical characteristics
8.8.4 Hidden defect
8.9 Information to be given in the relevant specification <\/td>\n<\/tr>\n
39<\/td>\n9 Test Uf: Robustness of component body
9.1 Object
9.2 Application
9.3 General description
9.4 Preconditioning
9.5 Initial measurement
9.6 Test procedure
9.6.1 Test Uf1: Body strength <\/td>\n<\/tr>\n
40<\/td>\nFigure 19 \u2013 SMD Body strength test Uf1 applied to a rectangular specimen <\/td>\n<\/tr>\n
41<\/td>\n9.6.2 Test Uf2: Impact shock
Figure 20 \u2013 SMD Body strength test Uf1 applied to a MELF specimen <\/td>\n<\/tr>\n
42<\/td>\nFigure 21 \u2013 Example of an apparatus for test Uf2
Figure 22 \u2013 Example of a piston <\/td>\n<\/tr>\n
43<\/td>\n9.7 Final measurements
9.7.1 Recovery
Figure 23 \u2013 Examples of the application of the SMD Body impact shock test Uf2 <\/td>\n<\/tr>\n
44<\/td>\n9.7.2 Visual examination
9.7.3 Electrical characteristics
9.7.4 Hidden defect
9.8 Information to be given in the relevant specification <\/td>\n<\/tr>\n
45<\/td>\nAnnex X (informative)Cross-reference for references tothe previous editions of this document
X.1 Cross-reference for references to the previous edition of IEC 60068\u20112\u201121
Table X.1 \u2013 Cross-reference to clauses <\/td>\n<\/tr>\n
46<\/td>\nX.2 Cross-reference for references to the last edition of IEC 60068\u20112\u201177
Table X.2 \u2013 Cross-reference to figures
Table X.3 \u2013 Cross reference to tables <\/td>\n<\/tr>\n
47<\/td>\nTable X.4 \u2013 Cross-reference to clauses
Table X.5 \u2013 Cross-reference to figures <\/td>\n<\/tr>\n
48<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Environmental testing – Tests. Test U: Robustness of terminations and integral mounting devices<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2021<\/td>\n50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":380858,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-380850","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/380850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/380858"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=380850"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=380850"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=380850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}