by adom
0805 MLCC · 47 µF ±20% X5R · 6.3 V
← Commit history
Pads: square corners, as the datasheet draws them (no added rounding); viewers, lbr, insertion GLB, hero rebuilt from the footprint
10 files changed
+23−31
CL21A476MQYNNNE-fpview.html+3−3CL21A476MQYNNNE.adom-lbr.json+2−2CL21A476MQYNNNE.insertion.glbCL21A476MQYNNNE.kicad_mod+3−3CL21A476MQYNNNE.lbr+3−3README.md+3−4cl21a476mqynnne-hero.glbcl21a476mqynnne-hero.overlay.json+3−3footprint-variants/CL21A476MQYNNNE.kicad_mod+3−3footprint-variants/CL21A476MQYNNNE.variants.json+3−10CL21A476MQYNNNE-fpview.html+3−3@@ -350,9 +350,9 @@ <rect x="1" y="1" width="3.08" height="1.88" fill="none" stroke="#FF26E2" stroke-width="0.05" stroke-dasharray="0.2,0.1"/> <rect x="1.54" y="1.315" width="2" height="1.25" fill="none" stroke="#6e7681" stroke-width="0.1"/> <line x1="2.238" y1="1.142" x2="2.842" y2="1.142" stroke="#00cccc" stroke-width="0.12" stroke-linecap="round"/><line x1="2.238" y1="2.738" x2="2.842" y2="2.738" stroke="#00cccc" stroke-width="0.12" stroke-linecap="round"/>-<rect x="1.2525" y="1.2525" width="0.875" height="1.375" rx="0.1" ry="0.1" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/>+<rect x="1.2525" y="1.2525" width="0.875" height="1.375" rx="0" ry="0" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/> <text x="1.69" y="1.94" text-anchor="middle" dominant-baseline="central" font-size="0.394" fill="#fff" font-family="sans-serif">1</text>-<rect x="2.9525" y="1.2525" width="0.875" height="1.375" rx="0.1" ry="0.1" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/>+<rect x="2.9525" y="1.2525" width="0.875" height="1.375" rx="0" ry="0" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/> <text x="3.39" y="1.94" text-anchor="middle" dominant-baseline="central" font-size="0.394" fill="#fff" font-family="sans-serif">2</text> </svg> </div>@@ -371,7 +371,7 @@ <div class="info-row"> - <div class="info-item"><span class="info-label">Desc</span><span class="info-value">Land pattern: Samsung Electro-Mechanics datasheet p.32</span></div><div class="info-item"><span class="info-label">Pads</span><span class="info-value">2 · 0.875 × 1.375 mm, r 0.1 mm</span></div><div class="info-item"><span class="info-label">Body</span><span class="info-value">2 × 1.25 mm</span></div><div class="info-item"><span class="info-label">Courtyard</span><span class="info-value">3.08 × 1.88 mm</span></div>+ <div class="info-item"><span class="info-label">Desc</span><span class="info-value">Land pattern: Samsung MLCC Product Manual, section 5-4 Land dimension (Reflow Footprint), p.32 (5-4 Land dimension, Reflow Footprint)</span></div><div class="info-item"><span class="info-label">Pads</span><span class="info-value">2 · 0.875 × 1.375 mm, r 0 mm</span></div><div class="info-item"><span class="info-label">Body</span><span class="info-value">2 × 1.25 mm</span></div><div class="info-item"><span class="info-label">Courtyard</span><span class="info-value">3.08 × 1.88 mm</span></div> </div> <div class="info-divider"></div> <div class="coord-row">
CL21A476MQYNNNE.adom-lbr.json+2−2@@ -198,7 +198,7 @@ "h_mm": 1.375, "drill_mm": 0.0, "rotation": 0.0,- "shape": "roundrect"+ "shape": "rect" }, { "number": "2",@@ -208,7 +208,7 @@ "h_mm": 1.375, "drill_mm": 0.0, "rotation": 0.0,- "shape": "roundrect"+ "shape": "rect" } ], "graphics": [
CL21A476MQYNNNE.insertion.glb⋯ 1 unchanged line ⋯
CL21A476MQYNNNE.kicad_mod+3−3@@ -2,7 +2,7 @@ (version 20240108) (generator "adom-basic-parts-overhaul") (layer "F.Cu")- (descr "Samsung Electro-Mechanics CL21A476MQYNNNE, 0805. Land pattern from Samsung MLCC Product Manual, section 5-4 Land dimension (Reflow Footprint), p.32 (5-4 Land dimension, Reflow Footprint); corners: datasheet silent; roundrect radius 0.1 mm = min(0.25 x smaller pad side, 0.1 mm), IPC-7351C rounded corners for paste release")+ (descr "Samsung Electro-Mechanics CL21A476MQYNNNE, 0805. Land pattern from Samsung MLCC Product Manual, section 5-4 Land dimension (Reflow Footprint), p.32 (5-4 Land dimension, Reflow Footprint); corners: square, as the datasheet draws them") (tags "0805") (attr smd) (fp_text reference "REF**" (at 0 -1.64) (layer "F.SilkS") (effects (font (size 1 1) (thickness 0.15))))@@ -11,6 +11,6 @@ (fp_rect (start -1 -0.625) (end 1 0.625) (stroke (width 0.1) (type default)) (fill none) (layer "F.Fab")) (fp_line (start -0.302 -0.798) (end 0.302 -0.798) (stroke (width 0.12) (type default)) (layer "F.SilkS")) (fp_line (start -0.302 0.798) (end 0.302 0.798) (stroke (width 0.12) (type default)) (layer "F.SilkS"))- (pad "1" smd roundrect (at -0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.1143))- (pad "2" smd roundrect (at 0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.1143))+ (pad "1" smd rect (at -0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask"))+ (pad "2" smd rect (at 0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask")) )
CL21A476MQYNNNE.lbr+3−3@@ -53,9 +53,9 @@ <description>\n \n 47 µF ±10% 6.3V Ceramic Capacitor X5R 0805 (2012 Metric)\n \n</description> <packages> <package name="CL21A476MQYNNNE">- <description>2 pads, 2.6 x 1.4 mm. Samsung Electro-Mechanics CL21A476MQYNNNE, 0805. Land pattern from Samsung MLCC Product Manual, section 5-4 Land dimension (Reflow Footprint), p.32 (5-4 Land dimension, Reflow Footprint); corners: datasheet silent; roundrect radius 0.1 mm = min(0.25 x smaller pad side, 0.1 mm), IPC-7351C rounded corners for paste release</description>- <smd name="1" x="-0.8500" y="-0.0000" dx="0.8750" dy="1.3750" layer="1" roundness="23"/>- <smd name="2" x="0.8500" y="-0.0000" dx="0.8750" dy="1.3750" layer="1" roundness="23"/>+ <description>2 pads, 2.6 x 1.4 mm. Samsung Electro-Mechanics CL21A476MQYNNNE, 0805. Land pattern from Samsung MLCC Product Manual, section 5-4 Land dimension (Reflow Footprint), p.32 (5-4 Land dimension, Reflow Footprint); corners: square, as the datasheet draws them</description>+ <smd name="1" x="-0.8500" y="-0.0000" dx="0.8750" dy="1.3750" layer="1"/>+ <smd name="2" x="0.8500" y="-0.0000" dx="0.8750" dy="1.3750" layer="1"/> <wire x1="-1.0000" y1="0.6250" x2="1.0000" y2="0.6250" width="0.1000" layer="51"/> <wire x1="1.0000" y1="0.6250" x2="1.0000" y2="-0.6250" width="0.1000" layer="51"/> <wire x1="1.0000" y1="-0.6250" x2="-1.0000" y2="-0.6250" width="0.1000" layer="51"/>
README.md+3−4@@ -38,11 +38,10 @@ Source: Land pattern from Samsung MLCC Product Manual, section 5-4 Land dimensio | Gap between pads | 0.8 to 0.85 | 0.9 | 0.726 | 0.825 | | Centre to centre | 1.65 to 1.75 | 1.9 | 1.776 | 1.7 | | Overall | 2.5 to 2.65 | 2.9 | 2.826 | 2.575 |-| Corner radius | not specified | 0.25 (ratio 0.25) | 0.1313 (ratio 0.125) | 0.1 (ratio 0.1143) |+| Corner radius | not specified | 0.25 (ratio 0.25) | 0.1313 (ratio 0.125) | square (as drawn) |+Corners: square, as the datasheet draws them. The datasheet does not call for rounded corners, so the footprint does not add any. -Corners: the datasheet drawing shows plain rectangles and says nothing about corners, so the pads are KiCad roundrects with the radius held to 0.25 x the smaller pad side and no more than 0.1 mm. IPC-7351C favours rounded SMD pad corners for cleaner paste release and to avoid stress points; capping the radius keeps the copper area within 0.71 % of a square-cornered pad.--::adom-footprint-variants{src="/adom/cl21a476mqynnne/render/footprint-variants/CL21A476MQYNNNE.variants.json" heading="Pad corners: this footprint, square corners, KiCad default rounding"}+::adom-footprint-variants{src="/adom/cl21a476mqynnne/render/footprint-variants/CL21A476MQYNNNE.variants.json" heading="Pad corners: this footprint (square, as drawn) and KiCad default rounding (not used)"} ## Chip outline
cl21a476mqynnne-hero.glb⋯ 1 unchanged line ⋯
cl21a476mqynnne-hero.overlay.json+3−3@@ -69,7 +69,7 @@ "glb": "CL21A476MQYNNNE.glb", "glb_sha256": "f655aeb9b6086d34b4744d031a60f492dbec6d2074c60467069da1fc920b4f88", "footprint": "CL21A476MQYNNNE.kicad_mod",- "footprint_sha256": "da4d61010b7215323598f31265bd21f98fe451827bfdace354d68ce5795a4e15",+ "footprint_sha256": "333ac1a63385c6509415f3ec2fc47b0aed873d7b4e14995b00bcfcfc4dd80adc", "pins": "page.json component.pins", "pins_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855" },@@ -97,7 +97,7 @@ "pads": [ { "number": "1",- "shape": "roundrect",+ "shape": "rect", "center_mm": [ -0.85, 0.0@@ -110,7 +110,7 @@ }, { "number": "2",- "shape": "roundrect",+ "shape": "rect", "center_mm": [ 0.85, 0.0
footprint-variants/CL21A476MQYNNNE.kicad_mod+3−3@@ -2,7 +2,7 @@ (version 20240108) (generator "adom-basic-parts-overhaul") (layer "F.Cu")- (descr "Samsung Electro-Mechanics CL21A476MQYNNNE, 0805. Land pattern from Samsung MLCC Product Manual, section 5-4 Land dimension (Reflow Footprint), p.32 (5-4 Land dimension, Reflow Footprint); corners: datasheet silent; roundrect radius 0.1 mm = min(0.25 x smaller pad side, 0.1 mm), IPC-7351C rounded corners for paste release")+ (descr "Samsung Electro-Mechanics CL21A476MQYNNNE, 0805. Land pattern from Samsung MLCC Product Manual, section 5-4 Land dimension (Reflow Footprint), p.32 (5-4 Land dimension, Reflow Footprint); corners: square, as the datasheet draws them") (tags "0805") (attr smd) (fp_text reference "REF**" (at 0 -1.64) (layer "F.SilkS") (effects (font (size 1 1) (thickness 0.15))))@@ -11,6 +11,6 @@ (fp_rect (start -1 -0.625) (end 1 0.625) (stroke (width 0.1) (type default)) (fill none) (layer "F.Fab")) (fp_line (start -0.302 -0.798) (end 0.302 -0.798) (stroke (width 0.12) (type default)) (layer "F.SilkS")) (fp_line (start -0.302 0.798) (end 0.302 0.798) (stroke (width 0.12) (type default)) (layer "F.SilkS"))- (pad "1" smd roundrect (at -0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.1143))- (pad "2" smd roundrect (at 0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.1143))+ (pad "1" smd rect (at -0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask"))+ (pad "2" smd rect (at 0.85 0) (size 0.875 1.375) (layers "F.Cu" "F.Paste" "F.Mask")) )
footprint-variants/CL21A476MQYNNNE.variants.json+3−10@@ -5,21 +5,14 @@ "variants": [ { "suffix": "",- "device": "this page",+ "device": "this page (square, as drawn)", "kicad_mod": "CL21A476MQYNNNE.kicad_mod", "footprintName": "CL21A476MQYNNNE",- "changed": "the page footprint: roundrect, corner radius 0.1 mm (ratio 0.1143)"- },- {- "suffix": "-SQ",- "device": "square corners",- "kicad_mod": "CL21A476MQYNNNE-SQ.kicad_mod",- "footprintName": "CL21A476MQYNNNE-SQ",- "changed": "same pads as plain rectangles, as the datasheet draws them"+ "changed": "the page footprint: plain rectangles, square corners, as the datasheet draws them" }, { "suffix": "-RR25",- "device": "KiCad default rounding",+ "device": "KiCad default rounding (not used)", "kicad_mod": "CL21A476MQYNNNE-RR25.kicad_mod", "footprintName": "CL21A476MQYNNNE-RR25", "changed": "same pads with roundrect_rratio 0.25 (KiCad's default), radius 0.2188 mm"