{"product_id":"5pcs-iron-powder-toroid-cores-t37-t50-carbonyl-ferrite-ring-inductor","title":"5pcs Iron Powder Toroid Cores T37 T50 Carbonyl Ferrite Rings","description":"\u003ch2\u003e5pcs Carbonyl Iron Powder Toroid Cores — T37-6 \/ T37-2 \/ T50-2 \/ T30-2\u003c\/h2\u003e\n\u003cp\u003eUpgrade your RF, audio, or power electronics projects with these precision-wound \u003cstrong\u003ecarbonyl iron powder toroid cores\u003c\/strong\u003e. Sold in a convenient 5-piece set, these red-coated ferrite toroid rings deliver stable, high-performance magnetic characteristics across a wide frequency range — making them an ideal choice for inductors, filters, chokes, and transformers in amateur radio, DIY electronics, and professional circuit design.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModels Available:\u003c\/strong\u003e T37-6 \/ T37-2 \/ T50-2 \/ T30-2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Carbonyl iron powder\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor Coating:\u003c\/strong\u003e Red\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 7.8 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 3.84 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 3.25 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 5 cores per pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Saturation Magnetic Flux Density:\u003c\/strong\u003e Handles large currents without saturating, keeping your circuits stable under demanding load conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExcellent Frequency Characteristics:\u003c\/strong\u003e Effective permeability remains consistent across a broad frequency range, ensuring reliable signal integrity for RF and audio applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Temperature Stability:\u003c\/strong\u003e Engineered to maintain performance characteristics at elevated temperatures, suitable for demanding environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Electromagnetic Radiation (Toroidal Design):\u003c\/strong\u003e The annular (ring) structure inherently contains magnetic flux, minimizing electromagnetic interference and reducing the need for additional shielding — saving both materials and cost.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Coating:\u003c\/strong\u003e Color-coded red coating protects the core and helps identify the material mix at a glance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRF inductors and low-pass filters for amateur (ham) radio\u003c\/li\u003e\n  \u003cli\u003eSwitching power supply chokes and transformers\u003c\/li\u003e\n  \u003cli\u003eAudio crossover networks and signal filters\u003c\/li\u003e\n  \u003cli\u003eEMI suppression and noise filtering in electronic circuits\u003c\/li\u003e\n  \u003cli\u003eDIY electronics, prototyping, and hobbyist projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e5 × Carbonyl Iron Powder Toroid Cores (your selected model)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eExplore more project essentials in our \u003ca href=\"\/products\/1-percent-better-every-day-motivational-canvas-wall-art-print\"\u003eDIY \u0026amp; Electronics collection\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLearn More About Magnetic Core Materials\u003c\/h3\u003e\n\u003cp\u003eFor technical background on magnetic materials and their use in electronics, visit the NIST Magnetic Properties of Materials resource.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Inductor\" target=\"_blank\" rel=\"noopener\"\u003eInductor\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the difference between the T37-6 and T37-2 iron powder toroid cores?\u003c\/h4\u003e\n\u003cp\u003eA: The T37-6 and T37-2 have the same physical size (T37 designation) but differ in material mix. The \"-6\" mix (yellow\/clear) is optimized for higher frequencies (up to ~40 MHz), while the \"-2\" mix (red) offers a higher permeability and is better suited for lower frequency applications such as AM broadcast and medium-wave inductors. The red-coated cores in this listing correspond to the \"-2\" mix, known for stable performance and higher inductance per turn.\u003c\/p\u003e\n\u003ch4\u003eQ: Are these toroid cores suitable for amateur radio (ham radio) projects?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — T37 and T50 series carbonyl iron powder toroid cores are among the most popular choices for ham radio builders. They are widely used in constructing RF chokes, bandpass filters, low-pass filters for antenna tuners, and impedance-matching transformers, making them a staple in QRP and homebrew radio kits.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I wind an inductor on a toroid core?\u003c\/h4\u003e\n\u003cp\u003eA: To wind an inductor, pass your enameled copper wire through the center hole of the toroid core the required number of times as specified by your circuit's design formula. The number of turns, combined with the core's AL value (inductance per turn²), determines the final inductance. Secure the winding with a small dab of adhesive or cable tie if needed. Always consult your project's datasheet or design guide for the precise turn count.\u003c\/p\u003e\n\u003ch4\u003eQ: Can these cores be used in switching power supply designs?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. Carbonyl iron powder cores with high saturation flux density are well-suited for switching power supply inductors and chokes, especially where DC bias performance is important. Verify the specific AL value and frequency range for your chosen core model against your power supply's switching frequency before finalizing the design.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the difference between the T37-6 and T37-2 iron powder toroid cores?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The T37-6 and T37-2 have the same physical size (T37 designation) but differ in material mix. The \\\"-6\\\" mix (yellow\/clear) is optimized for higher frequencies (up to ~40 MHz), while the \\\"-2\\\" mix (red) offers a higher permeability and is better suited for lower frequency applications such as AM broadcast and medium-wave inductors. The red-coated cores in this listing correspond to the \\\"-2\\\" mix, known for stable performance and higher inductance per turn.\"}}, {\"@type\": \"Question\", \"name\": \"Are these toroid cores suitable for amateur radio (ham radio) projects?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — T37 and T50 series carbonyl iron powder toroid cores are among the most popular choices for ham radio builders. They are widely used in constructing RF chokes, bandpass filters, low-pass filters for antenna tuners, and impedance-matching transformers, making them a staple in QRP and homebrew radio kits.\"}}, {\"@type\": \"Question\", \"name\": \"How do I wind an inductor on a toroid core?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"To wind an inductor, pass your enameled copper wire through the center hole of the toroid core the required number of times as specified by your circuit's design formula. The number of turns, combined with the core's AL value (inductance per turn²), determines the final inductance. Secure the winding with a small dab of adhesive or cable tie if needed. Always consult your project's datasheet or design guide for the precise turn count.\"}}, {\"@type\": \"Question\", \"name\": \"Can these cores be used in switching power supply designs?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. Carbonyl iron powder cores with high saturation flux density are well-suited for switching power supply inductors and chokes, especially where DC bias performance is important. Verify the specific AL value and frequency range for your chosen core model against your power supply's switching frequency before finalizing the design.\"}}]}\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:\/\/vd0uzy-jp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Soldering \u0026 Electrical\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/collections\/soldering-electrical\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"5pcs Iron Powder Toroid Cores T37 T50 Carbonyl Ferrite Rings\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/products\/5pcs-iron-powder-toroid-cores-t37-t50-carbonyl-ferrite-ring-inductor\"}]}\u003c\/script\u003e","brand":"Peaceful Pleasures Health and Wellness","offers":[{"title":"T50-2","offer_id":53667199058233,"sku":"1005007279043877-T50-2","price":12.43,"currency_code":"USD","in_stock":true},{"title":"T37-2","offer_id":53667199091001,"sku":"1005007279043877-T37-2","price":12.43,"currency_code":"USD","in_stock":true},{"title":"T30-2","offer_id":53667199123769,"sku":"1005007279043877-T30-2","price":12.43,"currency_code":"USD","in_stock":true},{"title":"T37-6","offer_id":53667199156537,"sku":"1005007279043877-T37-6","price":12.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/3689\/5801\/files\/S97af5723dce74ab89a5027ee00508043N.webp?v=1783010770","url":"https:\/\/peacefulpleasureswellness.com\/products\/5pcs-iron-powder-toroid-cores-t37-t50-carbonyl-ferrite-ring-inductor","provider":"Peaceful Pleasures Health and Wellness","version":"1.0","type":"link"}