{"product_id":"copper-heatsink-sheet-15x15mm-20x20mm-guillotine-cut","title":"Copper Sheet Plate Guillotine Cut Metal 15x15mm\/20x20mm Heatsink Cooling Sheets","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eCopper Heatsink Cooling Sheets — Precision Guillotine-Cut for Reliable Thermal Management\u003c\/h2\u003e\n\u003cp\u003eWhen your electronics run hot and thermal throttling starts costing you performance, the right thermal interface material makes all the difference. Whether you are a maker building custom PC cooling loops, an engineer prototyping power electronics, or a hobbyist repairing laptops and game consoles, these guillotine-cut copper sheets give you a clean, ready-to-use solution without the need for additional machining.\u003c\/p\u003e\n\u003cp\u003eEach sheet is cut from solid copper stock using a guillotine shear, producing straight, burr-minimized edges. Available in two footprints — 15x15 mm (approx. 0.59x0.59 in) and 20x20 mm (approx. 0.79x0.79 in) — with thickness options ranging from 0.3 mm to 2.0 mm (approx. 0.012–0.079 in). Copper purity is consistent throughout, ensuring reliable thermal conductivity across the full surface area.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include CPU and GPU heatsink shims for laptop repasting, thermal spreader layers in custom power supply builds, conductive spacers in LED driver assemblies, and heat-spreading pads in DIY battery management systems. The square format and multiple thickness options make these copper heatsink shims a versatile stock item for any electronics workbench.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔧\u003c\/span\u003e Compatible with standard CPU\/GPU die sizes, TO-220 and TO-247 power packages, and custom PCB thermal pad layouts. Fits between heatsink and component without modification for 15x15 mm and 20x20 mm footprints.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Copper Heatsink Cooling Sheets\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🟠\u003c\/span\u003e\u003cstrong\u003eSolid Copper Construction\u003c\/strong\u003e — Made from solid copper for high thermal conductivity, efficiently transferring heat away from sensitive components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✂️\u003c\/span\u003e\u003cstrong\u003eGuillotine-Cut Edges\u003c\/strong\u003e — Shear-cut process produces straight, clean edges with minimal burring, reducing prep time before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eMultiple Thickness Options\u003c\/strong\u003e — Choose from 0.3, 0.5, 0.8, 1.0, 1.2, 1.5, or 2.0 mm thick variants to match your exact gap-filling requirement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eTwo Footprint Sizes\u003c\/strong\u003e — 15x15 mm and 20x20 mm square formats cover the most common small-component heatsink shim applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔁\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Available in 5, 10, 20, or 50-piece packs so you can stock exactly what your project or repair workflow demands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eCorrosion-Resistant Surface\u003c\/strong\u003e — Copper's natural oxide layer provides a degree of surface protection; suitable for enclosed electronics environments where direct moisture exposure is limited.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Copper Heatsink Shim Sheet\u003c\/h2\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCopper (Cu)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCut Method\u003c\/th\u003e\n\u003ctd\u003eGuillotine shear cut\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFootprint Options\u003c\/th\u003e\n\u003ctd\u003e15x15 mm \/ 20x20 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThickness Options\u003c\/th\u003e\n\u003ctd\u003e0.3 mm \/ 0.5 mm \/ 0.8 mm \/ 1.0 mm \/ 1.2 mm \/ 1.5 mm \/ 2.0 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThermal Conductivity\u003c\/th\u003e\n\u003ctd\u003e~385 W\/(m·K) (typical for copper)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Sizes Available\u003c\/th\u003e\n\u003ctd\u003e5 pcs \/ 10 pcs \/ 20 pcs \/ 50 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEdge Condition\u003c\/th\u003e\n\u003ctd\u003eShear cut, burr-minimized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eHeatsink shim, thermal spreader, conductive spacer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I choose the right thickness for my heatsink shim application?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure the gap between your component's heat spreader and the heatsink base using a feeler gauge or calipers. For CPU\/GPU repasting on laptops, 0.3–0.8 mm is most common; for power transistor mounting, 1.0–2.0 mm may be needed to fill larger gaps.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhat is the thermal conductivity of these copper sheets?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCopper has a thermal conductivity of approximately 385 W\/(m·K), making it one of the most thermally efficient metals available — significantly higher than aluminum (~205 W\/(m·K)) and far above most thermal pads.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these sheets compatible with standard CPU and GPU die sizes?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe 15x15 mm size fits most laptop CPU and GPU dies directly. The 20x20 mm size suits slightly larger dies or power packages such as TO-247. For desktop CPUs, these sheets are typically used as supplemental thermal layers.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDo I need to apply thermal paste on top of the copper sheet?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Copper sheets are rigid and will not conform to microscopic surface irregularities on their own. Apply a thin layer of thermal compound on both the component side and the heatsink side to eliminate air gaps and maximize thermal transfer efficiency.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWill copper corrode or oxidize over time inside my device?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCopper does form a thin oxide layer when exposed to air, but this process is slow and does not significantly impair thermal performance in enclosed electronics environments. Applying thermal compound to both surfaces before installation also acts as a moisture barrier.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I cut or trim these sheets to a custom size?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Copper in these thicknesses (0.3–2.0 mm) can be cut with sharp metal shears, a hobby knife (for thinner variants), or a rotary tool with a cutting disc. Always deburr cut edges with fine sandpaper before installation.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eWhich pack size should I order for a one-time repair vs. ongoing workshop stock?\u003c\/summary\u003e\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eFor a single laptop repaste or one-off repair, the 5-piece pack is sufficient. If you run a repair shop or regularly work on electronics cooling projects, the 20-piece or 50-piece packs offer a lower per-unit cost and ensure you always have the right thickness on hand.\u003c\/p\u003e\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your size and pack quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How do I choose the right thickness for my heatsink shim application?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Measure the gap between your component's heat spreader and the heatsink base using a feeler gauge or calipers. 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