{"product_id":"t37-6-iron-powder-toroid-cores-al-3nh-n2-dust-core-5-pack","title":"T37-6 Iron Powder Toroid Core AL 3nH\/N² – 5 Pack","description":"\u003ch2\u003eT37-6 Iron Powder Toroid Cores – Pack of 5\u003c\/h2\u003e\n\u003cp\u003eUpgrade your electronics projects with these precision-engineered \u003cstrong\u003eT37-6 Iron Powder Toroid Cores\u003c\/strong\u003e. Designed for reliable inductance performance in RF circuits, filters, and power electronics, each core delivers consistent electromagnetic properties in a compact, easy-to-wind toroidal form factor. Their distinctive \u003cstrong\u003eyellow-gray coating\u003c\/strong\u003e makes identification straightforward, while the iron powder composition ensures excellent frequency stability and low core loss across a wide range of applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e T37-6 Iron Powder Toroid Core\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e Approx. 9.5mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInside Diameter:\u003c\/strong\u003e Approx. 5.2mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e Approx. 3.3mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInductance Coefficient (AL):\u003c\/strong\u003e 3 nH\/N²\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePermeability (μ):\u003c\/strong\u003e Approx. 8.5μo\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Iron powder core\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\/Coating:\u003c\/strong\u003e Yellow-gray\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCore Type:\u003c\/strong\u003e Toroid (dust core \/ ferrite-style powder core)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 5 pieces per pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose T37-6 Iron Powder Cores?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStable Inductance:\u003c\/strong\u003e Iron powder construction provides consistent AL values, making winding calculations predictable and repeatable.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Core Loss:\u003c\/strong\u003e Optimized for use at higher frequencies with minimal energy dissipation, ideal for RF and switching circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Toroidal Design:\u003c\/strong\u003e The toroid shape minimizes electromagnetic interference and self-shields the magnetic field, reducing stray coupling.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Coating:\u003c\/strong\u003e The yellow-gray epoxy coating protects the core and aids in color-coded identification for quick selection on your workbench.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Application:\u003c\/strong\u003e Suitable for amateur radio (ham radio) inductors, switch-mode power supply (SMPS) filters, EMI suppression chokes, and general electronics prototyping.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRF inductors and bandpass filters\u003c\/li\u003e\n  \u003cli\u003eAmateur \/ ham radio antenna tuners and baluns\u003c\/li\u003e\n  \u003cli\u003eSwitch-mode power supply (SMPS) choke coils\u003c\/li\u003e\n  \u003cli\u003eEMI\/RFI noise suppression filters\u003c\/li\u003e\n  \u003cli\u003eElectronics hobbyist and prototyping projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on electromagnetic components and their safe use in electronic circuits, visit the NIST Electromagnetic Metrology Program.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the T37-6 iron powder toroid core used for?\u003c\/h4\u003e\n\u003cp\u003eA: The T37-6 iron powder toroid core is widely used in RF inductors, amateur radio circuits, switch-mode power supplies, EMI suppression filters, and general electronics prototyping. Its compact toroidal form factor and stable inductance coefficient (AL = 3 nH\/N²) make it a popular choice for precision winding applications across a broad frequency range.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What do the T37-6 specifications mean?\u003c\/h4\u003e\n\u003cp\u003eA: \"T37\" refers to the toroid core size — approximately 9.5mm outer diameter, 5.2mm inner diameter, and 3.3mm height. The \"-6\" denotes the material mix (Mix 6), which is an iron powder blend optimized for frequencies from approximately 10 MHz to 50 MHz, with an inductance coefficient (AL) of 3 nH per turn squared and a permeability of approximately 8.5μo. The yellow-gray coating is the standard color code for Mix 6 cores.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I calculate the number of turns needed for a specific inductance with this core?\u003c\/h4\u003e\n\u003cp\u003eA: You can use the formula: \u003cstrong\u003eN = √(L \/ AL)\u003c\/strong\u003e, where L is the desired inductance in nanohenries (nH) and AL = 3 nH\/N² for this core. For example, to achieve 270 nH, you would wind approximately √(270 \/ 3) = √90 ≈ 9.5, so about 10 turns. Always verify with an LC meter after winding for best accuracy.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many cores are included in this listing?\u003c\/h4\u003e\n\u003cp\u003eA: This listing includes \u003cstrong\u003e5 pieces\u003c\/strong\u003e of T37-6 iron powder toroid cores, giving you extras for prototyping, testing, or multiple projects.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the T37-6 iron powder toroid core used for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The T37-6 iron powder toroid core is widely used in RF inductors, amateur radio circuits, switch-mode power supplies, EMI suppression filters, and general electronics prototyping. Its compact toroidal form factor and stable inductance coefficient (AL = 3 nH\/N²) make it a popular choice for precision winding applications across a broad frequency range.\"}}, {\"@type\": \"Question\", \"name\": \"What do the T37-6 specifications mean?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"\\\"T37\\\" refers to the toroid core size — approximately 9.5mm outer diameter, 5.2mm inner diameter, and 3.3mm height. The \\\"-6\\\" denotes the material mix (Mix 6), which is an iron powder blend optimized for frequencies from approximately 10 MHz to 50 MHz, with an inductance coefficient (AL) of 3 nH per turn squared and a permeability of approximately 8.5μo. The yellow-gray coating is the standard color code for Mix 6 cores.\"}}, {\"@type\": \"Question\", \"name\": \"How do I calculate the number of turns needed for a specific inductance with this core?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"You can use the formula: N = √(L \/ AL), where L is the desired inductance in nanohenries (nH) and AL = 3 nH\/N² for this core. For example, to achieve 270 nH, you would wind approximately √(270 \/ 3) = √90 ≈ 9.5, so about 10 turns. Always verify with an LC meter after winding for best accuracy.\"}}, {\"@type\": \"Question\", \"name\": \"How many cores are included in this listing?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This listing includes 5 pieces of T37-6 iron powder toroid cores, giving you extras for prototyping, testing, or multiple projects.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Tech, Tools \u0026 Auto\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/collections\/tech-tools-auto\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"T37-6 Iron Powder Toroid Core AL 3nH\/N² – 5 Pack\", \"item\": \"https:\/\/vpggdm-rp.myshopify.com\/products\/t37-6-iron-powder-toroid-cores-al-3nh-n2-dust-core-5-pack\"}]}\u003c\/script\u003e","brand":"Qme","offers":[{"title":"Default Title","offer_id":49790305730774,"sku":"\u003cnone\u003e","price":24.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0827\/5243\/8486\/files\/Sb067082e09814836a9c60c9107e4bee3D.webp?v=1785345559","url":"https:\/\/qmeboost.com\/products\/t37-6-iron-powder-toroid-cores-al-3nh-n2-dust-core-5-pack","provider":"Qme","version":"1.0","type":"link"}