by adom
0805 MLCC · 1 µF ±10% X7R · 50 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
CL21B105KBFNNNE-fpview.html+3−3CL21B105KBFNNNE.adom-lbr.json+2−2CL21B105KBFNNNE.insertion.glbCL21B105KBFNNNE.kicad_mod+3−3CL21B105KBFNNNE.lbr+3−3README.md+3−4cl21b105kbfnnne-hero.glbcl21b105kbfnnne-hero.overlay.json+3−3footprint-variants/CL21B105KBFNNNE.kicad_mod+3−3footprint-variants/CL21B105KBFNNNE.variants.json+3−10CL21B105KBFNNNE-fpview.html+3−3@@ -350,9 +350,9 @@ <rect x="1" y="1" width="2.78" height="1.78" fill="none" stroke="#FF26E2" stroke-width="0.05" stroke-dasharray="0.2,0.1"/> <rect x="1.39" y="1.265" width="2" height="1.25" fill="none" stroke="#6e7681" stroke-width="0.1"/> <line x1="2.137" y1="1.142" x2="2.643" y2="1.142" stroke="#00cccc" stroke-width="0.12" stroke-linecap="round"/><line x1="2.137" y1="2.638" x2="2.643" y2="2.638" stroke="#00cccc" stroke-width="0.12" stroke-linecap="round"/>-<rect x="1.2525" y="1.2525" width="0.775" height="1.275" rx="0.1" ry="0.1" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/>+<rect x="1.2525" y="1.2525" width="0.775" height="1.275" rx="0" ry="0" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/> <text x="1.64" y="1.89" text-anchor="middle" dominant-baseline="central" font-size="0.349" fill="#fff" font-family="sans-serif">1</text>-<rect x="2.7525" y="1.2525" width="0.775" height="1.275" rx="0.1" ry="0.1" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/>+<rect x="2.7525" y="1.2525" width="0.775" height="1.275" rx="0" ry="0" fill="#C83434" stroke="#ef5350" stroke-width="0.04"/> <text x="3.14" y="1.89" text-anchor="middle" dominant-baseline="central" font-size="0.349" 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 · 0.775 × 1.275 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">2.78 × 1.78 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 · 0.775 × 1.275 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">2.78 × 1.78 mm</span></div> </div> <div class="info-divider"></div> <div class="coord-row">
CL21B105KBFNNNE.adom-lbr.json+2−2@@ -198,7 +198,7 @@ "h_mm": 1.275, "drill_mm": 0.0, "rotation": 0.0,- "shape": "roundrect"+ "shape": "rect" }, { "number": "2",@@ -208,7 +208,7 @@ "h_mm": 1.275, "drill_mm": 0.0, "rotation": 0.0,- "shape": "roundrect"+ "shape": "rect" } ], "graphics": [
CL21B105KBFNNNE.insertion.glb⋯ 1 unchanged line ⋯
CL21B105KBFNNNE.kicad_mod+3−3@@ -2,7 +2,7 @@ (version 20240108) (generator "adom-basic-parts-overhaul") (layer "F.Cu")- (descr "Samsung Electro-Mechanics CL21B105KBFNNNE, 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 CL21B105KBFNNNE, 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 -1.59) (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 -0.253 -0.748) (end 0.253 -0.748) (stroke (width 0.12) (type default)) (layer "F.SilkS")) (fp_line (start -0.253 0.748) (end 0.253 0.748) (stroke (width 0.12) (type default)) (layer "F.SilkS"))- (pad "1" smd roundrect (at -0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.129))- (pad "2" smd roundrect (at 0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.129))+ (pad "1" smd rect (at -0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask"))+ (pad "2" smd rect (at 0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask")) )
CL21B105KBFNNNE.lbr+3−3@@ -53,9 +53,9 @@ <description>\n \n 1 µF ±10% 50V Ceramic Capacitor X7R 0805 (2012 Metric)\n \n</description> <packages> <package name="CL21B105KBFNNNE">- <description>2 pads, 2.3 x 1.3 mm. Samsung Electro-Mechanics CL21B105KBFNNNE, 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="-0.7500" y="-0.0000" dx="0.7750" dy="1.2750" layer="1" roundness="26"/>- <smd name="2" x="0.7500" y="-0.0000" dx="0.7750" dy="1.2750" layer="1" roundness="26"/>+ <description>2 pads, 2.3 x 1.3 mm. Samsung Electro-Mechanics CL21B105KBFNNNE, 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="-0.7500" y="-0.0000" dx="0.7750" dy="1.2750" layer="1"/>+ <smd name="2" x="0.7500" y="-0.0000" dx="0.7750" dy="1.2750" 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 | 0.7 to 0.75 | 0.9 | 0.726 | 0.725 | | Centre to centre | 1.45 to 1.55 | 1.9 | 1.776 | 1.5 | | Overall | 2.2 to 2.35 | 2.9 | 2.826 | 2.275 |-| Corner radius | not specified | 0.25 (ratio 0.25) | 0.1313 (ratio 0.125) | 0.1 (ratio 0.129) |+| 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 0.87 % of a square-cornered pad.--::adom-footprint-variants{src="/adom/cl21b105kbfnnne/render/footprint-variants/CL21B105KBFNNNE.variants.json" heading="Pad corners: this footprint, square corners, KiCad default rounding"}+::adom-footprint-variants{src="/adom/cl21b105kbfnnne/render/footprint-variants/CL21B105KBFNNNE.variants.json" heading="Pad corners: this footprint (square, as drawn) and KiCad default rounding (not used)"} ## Chip outline
cl21b105kbfnnne-hero.glb⋯ 1 unchanged line ⋯
cl21b105kbfnnne-hero.overlay.json+3−3@@ -69,7 +69,7 @@ "glb": "CL21B105KBFNNNE.glb", "glb_sha256": "e10148dddbcaba8387735a858fac47d56c5287662f9c915958694ef071b842b6", "footprint": "CL21B105KBFNNNE.kicad_mod",- "footprint_sha256": "1af625c34af330abe2a5a30d7b68afe8da28d1b0377e7c9391bd36fe866f299e",+ "footprint_sha256": "fe59a3a6bb28ab30d2515bb4ee4595dbf0d54a68c6474b3c789e9ee10ac5c4e3", "pins": "page.json component.pins", "pins_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855" },@@ -97,7 +97,7 @@ "pads": [ { "number": "1",- "shape": "roundrect",+ "shape": "rect", "center_mm": [ -0.75, 0.0@@ -110,7 +110,7 @@ }, { "number": "2",- "shape": "roundrect",+ "shape": "rect", "center_mm": [ 0.75, 0.0
footprint-variants/CL21B105KBFNNNE.kicad_mod+3−3@@ -2,7 +2,7 @@ (version 20240108) (generator "adom-basic-parts-overhaul") (layer "F.Cu")- (descr "Samsung Electro-Mechanics CL21B105KBFNNNE, 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 CL21B105KBFNNNE, 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 -1.59) (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 -0.253 -0.748) (end 0.253 -0.748) (stroke (width 0.12) (type default)) (layer "F.SilkS")) (fp_line (start -0.253 0.748) (end 0.253 0.748) (stroke (width 0.12) (type default)) (layer "F.SilkS"))- (pad "1" smd roundrect (at -0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.129))- (pad "2" smd roundrect (at 0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask") (roundrect_rratio 0.129))+ (pad "1" smd rect (at -0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask"))+ (pad "2" smd rect (at 0.75 0) (size 0.775 1.275) (layers "F.Cu" "F.Paste" "F.Mask")) )
footprint-variants/CL21B105KBFNNNE.variants.json+3−10@@ -5,21 +5,14 @@ "variants": [ { "suffix": "",- "device": "this page",+ "device": "this page (square, as drawn)", "kicad_mod": "CL21B105KBFNNNE.kicad_mod", "footprintName": "CL21B105KBFNNNE",- "changed": "the page footprint: roundrect, corner radius 0.1 mm (ratio 0.129)"- },- {- "suffix": "-SQ",- "device": "square corners",- "kicad_mod": "CL21B105KBFNNNE-SQ.kicad_mod",- "footprintName": "CL21B105KBFNNNE-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": "CL21B105KBFNNNE-RR25.kicad_mod", "footprintName": "CL21B105KBFNNNE-RR25", "changed": "same pads with roundrect_rratio 0.25 (KiCad's default), radius 0.1938 mm"