{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH31MN180K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH31MN180K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH31MN180K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH31MN180K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH31 series, Drum Core Wirewound Inductor, 18 µH, ±10%, 85 mA, Unshielded, 1206 (3216 Metric), Tape & Reel.","salesMarkdown":"## 18 µH wirewound inductor in 1206 — last-buy timing The LQH31MN180K03L is a Murata drum-core wirewound inductor delivering 18 µH at 1 MHz test frequency, rated for 85 mA continuous current. With a maximum DC resistance of 4.42 Ohm, the I²R loss at full rated current is about 32 mW — negligible for most signal filtering or low-power DC-DC output ripple applications, but the DCR does set a floor on efficiency in a boost or buck inductor position. The unshielded construction means the external magnetic field couples into adjacent traces or components — layout separation from sensitive analog or RF nodes is advisable. The self-resonant frequency is 15 MHz, so the usable inductance band stops well before that; above SRF the part behaves capacitively. ## Last-buy lifecycle and supply posture Murata has designated the LQH31MN180K03L as Last Buy — the manufacturer's end-of-life notice is active, and the remaining production window is finite. Sourced through independent distribution channels against an RFQ. The 1206 footprint and 18 µH / 85 mA rating are the parameters to match for a drop-in replacement.","metaTitle":"Murata LQH31MN180K03L Drum Core Inductor, 18 µH, 85 mA","metaDescription":"Murata LQH31MN180K03L wirewound drum core inductor, 18 µH, 85 mA, 4.42 Ohm DCR, 1206 package. Last Buy lifecycle — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Inductors & Chokes"],"specifications":{"Mfr":"Murata Electronics","Type":"Drum Core, Wirewound","Series":"LQH31","Package":"Tape & Reel (TR)","Ratings":"-","Q @ Freq":"35 @ 5MHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"18 µH","Mounting Type":"Surface Mount","Package / Case":"1206 (3216 Metric)","Product Status":"Last Time Buy","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.063\\\" W (3.20mm x 1.60mm)","Base Product Number":"LQH31MN","DC Resistance (DCR)":"4.42Ohm Max","Current Rating (Amps)":"85 mA","Height - Seated (Max)":"0.079\\\" (2.00mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1206","Frequency - Self Resonant":"15MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3023","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/23793266b202ae546e5047be20f0e556.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance and current rating of LQH31MN180K03L?","answer":"18 µH at 1 MHz test frequency, ±10% tolerance, rated for 85 mA continuous current. Maximum DC resistance is 4.42 Ohm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH31MN180K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH31MN180K03L when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}