BS EN IEC 60068-2-21:2021

This standard BS EN IEC 60068-2-21:2021 Environmental testing is classified in these ICS categories:

• 19.040 Environmental testing
• 31.190 Electronic component assemblies

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).

The recommended test methods suitable for specific terminations/lead of devices are shown in Table 1.

Table 1 – Selection of test methods suitable for specific terminations/leads

Test method		Component	Mounted/not mounted	See Clause
Test	Type
Ua1	Tensile	Leaded devices	Not mounted	Clause 4
Ua2	Thrust	Leaded devices	Not mounted	Clause 4
Ub	Bending	Leaded devices	Not mounted	Clause 5
Uc	Torsion	Leaded devices	Not mounted	Clause 6
Ud	Torque	Threaded stud, screw or other terminations	Not mounted	Clause 7
Ue1	Substrate bending	Surface mount devices	Mounted	Clause 8
Ue2	Pull/push	Surface mount devices	Mounted	Clause 8
Ue3	Shear	Surface mount devices	Mounted	Clause 8
Uf1	Body strength	Surface mount devices	Not mounted	Clause 9
Uf2	Impact shock	Surface mount devices	Not mounted	Clause 9