9.2.5.2.3 Coating Meniscus In Solder For Class 1 and 2 as an exception to Table 9-1, on the solder destination side the meniscus maybe covered by solder but on the solder source side there shall (D1 D2 D3) be 360° visible solder wetting and no visible coatingmeniscus in the solder connection. For Class 3, solder connections shall (D1 D2 D3) meet the requirements of Table 9-1.9.2.6 Surface Soldering of Leads and Terminations Solder joints or terminations on components designed for surface mountingshall (D1 D2 D3) exhibit conditions that meet the general descriptions of 9.2.4, and shall not (D1 D2 D3) exhibit any of the defectconditions of 9.2.4.2, with the specific dimensions defined in 9.2.6.4 through 9.2.6.15. See Table 9-53.9.2.6.1 Misaligned Components Some surface mounted components will self-align during reflow soldering but a degree ofmisalignment is permitted to the extent specified in Tables 9-4 through 9-15; however, minimum design electrical clearance shall not(D1 D2 D3) be violated.9.2.6.2 Unspecified Requirements In the following paragraphs certain joint features are unspecified in size and the only requirementis that a properly wetted fillet be visible. Requirements not specifying any geometric dimensions are considered noncritical to theperformance of the interconnection.9.2.6.3 Special Class 1 SMT Requirements Class 1 surface mount joints formed to a connector, socket, and other leads orterminations without mechanical support, subject to stress from insertion and withdrawal of components or printed boards shall (D1Not applicable 2,3) meet the requirements of Class 2 or 3.Table 9-2 Lead ProtrusionClass 1 Class 2 Class 3(L) min1 End is discernible(L) max2 No danger of shorts 2.5 mm [0.0984 in] 1.5 mm [0.0591 in]Notes:1. For plated-through hole boards greater than 2.3 mm [0.0906 in] thick, components with pre-established lead lengths, (DIPs,sockets), lead protrusion may not be visible.2. Lead protrusion should not exceed 2.5 mm [0.0984 in] if there is a possibility of violation of minimum electrical spacing, damage tosoldered connections due to lead deflection or penetration of static protective packaging during subsequent handling or operatingenvironments.Table 9-3 Surface Mount Components