Notes on soldering - AH00.19-P-1000-10A

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Ensure that lead-free solder is used. Heat the parts to be joined and the solder evenly. Avoid heat-dissipating mounts and brackets. When connecting wires and component connections, the soldering process takes 2 to 4 seconds depending on the cross-section. It takes the same amount of time for hardening.

Unnecessarily high heating and associated damage to components must be avoided.

During pauses in soldering, it must be ensured that the soldering tip remains adequately tin-plated.

Surface of the soldering join

Correct solder connection (A):

The solder surface (4) is smooth, shiny, no sharp edges, no interruptions, fluid and free of residues and oxidation.

Incorrect solder connection (B):

The surface of the solder (4) is matt and uneven, it has sharp-edged ends, interruptions, has not flown, covered with residue.

Fig 1: Identifying Solder Surface

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Wire position and contour of soldering join

Correct solder connection (A):

The distance (a) between the solder connector (2) and the line insulation is about 1 mm. The soldered area does not extend beyond the collar of the solder connector (2). Solder flows in a radius towards the line insulation and surrounds at least 2/3 of the lead outside the solder connector (2). There are no bare copper wires visible in the soldering area.

Incorrect solder connection (B):

If the distance (a) between the solder connector (2) and the line insulation (a) is greater than 2 mm, the line is incorrectly inserted. The solder protrudes beyond the extension line (b) from the collar of the solder connector (2). The solder flows in the wrong direction, the transition from solder to lead is jagged, the solder surface (3) has not flown and is thus a dry solder joint.

Fig 2: Identifying Distance Between Solder Connector And Line Insulation

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Solder covering and solder quantity for the soldering join

Correct solder connection (A):

The quantity of solder (4) is adequate. Lead of wire (1) is completely surrounded. Solder connector (2) is not covered with solder (4) around the collar.

Incorrect solder connection (B):

The quantity of solder (4) is inadequate. Lead of wire (1) is not completely surrounded. Single wires are not incorporated by the solder (4).

Fig 3: Identifying Solder Connection

Courtesy of MERCEDES-BENZ USA