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593D

Vishay Sprague

Document Number 40005

Revision 01-Mar-04

36

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9.

Recommended Mounting Pad Geometries: Proper mounting pad geometries are essential for successful solder

connections. These dimensions are highly process sensitive and should be designed to minimize component rework

due to unacceptable solder joints. The dimensional configurations shown are the recommended pad geometries for

both wave and reflow soldering techniques. These dimensions are intended to be a starting point for circuit board

designers and may be fine tuned if necessary based upon the peculiarities of the soldering process and/or circuit board

design.

Wave Solder Pads

Reflow Solder Pads

Pad Dimensions

Case

Code

A

(Min.)

B

(Nom.)

C

(Nom.)

D

(Nom.)

E

(Nom.)

0.034

[0.87]

0.061

[1.54].

061

[1.54]

0.066

[1.68]

0.066

[1.68]

0.085

[2.15]

0.085

[2.15]

0.106

[2.70]

0.106

[2.70]

0.106

[2.70]

0.053

[1.35]

0.065

[1.65]

0.124

[3.15]

0.175

[4.45]

0.175

[4.45]

0.222

[5.65]

0.234

[5.95]

0.337

[8.55]

0.388

[9.85]

0.388

[9.85]

0.048

[1.23]

0.048

[1.23]

0.050

[1.28]

0.050

[1.28]

0.050

[1.28]

A

B

C

D

E

A

(Min.)

B

(Nom.)

C

(Nom.)

D

(Nom.)

E

(Nom.)

0.071

[1.80]

0.110

[2.80]

0.110

[2.80]

0.118

[3.00]

0.118

[3.00]

0.085

[2.15]

0.085

[2.15]

0.106

[2.70]

0.106

[2.70]

0.106

[2.70]

0.053

[1.35]

0.065

[1.65]

0.124

[3.15]

0.175

[4.45]

0.175

[4.45]

0.222

[5.65]

0.234

[5.95]

0.337

[8.55]

0.388

[9.85]

0.388

[9.85]

0.048

[1.23]

0.048

[1.23]

0.050

[1.28]

0.050

[1.28]

0.050

[1.28]

D

A

C

B

E

Pad Dimensions

D

B

A

E

C

Case

Code

A

B

C

D

E

GUIDE TO APPLICATION (Continued)

Recommended Solder Profile — Wave Solder

Recommended Solder Profile — Reflow

300

250

200

150

100

50

0

300

250

200

150

100

50

0

0

50

100

150

200

250

245

130

Time (Seconds)

300

250

200

150

100

50

0

0

50

100

150

200

250

300

250

200

150

100

50

0

Max. Recommended

260

130

5 - 10 Sec.

Time (Seconds)

SOLDERING PROFILE

RECOMMENDED MOUNTING PAD GEOMETRIES Iin inches [millimeters]