{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH31MN470J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH31MN470J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH31MN470J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH31MN470J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH31 series drum core wirewound inductor, LQH31MN470J03L, 47 µH, ±5%, 55 mA, 8 Ω DCR, 1206 (3216 Metric) SMD package, unshielded.","salesMarkdown":"## 47 µH at 55 mA — the BOM-fit reality The LQH31MN470J03L is a 47 µH drum core wirewound inductor from Murata's LQH31 series, rated for 55 mA continuous current with an 8 Ω DC resistance. That DCR is the dominant loss term at this current — expect roughly 24 mW of self-heating at full rated current, which stays within the 85 °C ceiling in still air. The unshielded construction means the magnetic field extends beyond the 1206 footprint — keep sensitive traces or adjacent magnetics at least one part-width away to avoid coupling. Ferrite core material gives stable inductance up to the 10 MHz self-resonant frequency; above that the part behaves capacitive. ## Last Buy — what it means for your BOM line Murata has flagged the LQH31MN470J03L as Last Buy. That means the manufacturer is no longer accepting blanket orders — remaining inventory is being consumed, and once it's gone, this exact order code will not be produced again. No official successor part number has been published for this specific inductance/tolerance combination. ## Q factor and frequency ceiling The Q factor of 40 at 2.5 MHz tells you the inductor's efficiency at that frequency — the ratio of stored energy to dissipated energy per cycle. Below 2.5 MHz the Q is higher; above it the core losses and skin effect in the wire start to dominate, and the Q drops. The self-resonant frequency at 10 MHz is the hard ceiling — above that the inductor looks capacitive and the circuit stops behaving as intended. The inductance is tested at 1 MHz, which is well within the flat-band region. If your switching regulator or filter operates above 5 MHz, the effective inductance will be lower than 47 µH due to the approach to self-resonance — derate accordingly. ## 1206 footprint — rework and layout The terminations are on the short ends, so the inductor sits with the winding axis parallel to the board. Reflow profile follows standard lead-free solder curves for a ferrite-core component; no special bake-out needed unless the tape has been exposed to high humidity. Unshielded means the magnetic field fringes out the top and sides — keep the part away from ferrous mounting hardware or enclosure walls that could shift the inductance. The ±5% tolerance is tighter than the ±10% or ±20% common on power-grade inductors, so this part suits tuned circuits or filters where the inductance value needs to stay within a narrow window.","metaTitle":"Murata LQH31MN470J03L 47 µH Unshielded Inductor, Last Buy","metaDescription":"Murata LQH31MN470J03L drum core wirewound inductor, 47 µH ±5%, 55 mA, 8 Ω DCR, 1206 SMD. Last Buy status — 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) Cut Tape (CT)","Ratings":"-","Q @ Freq":"40 @ 2.5MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"47 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)":"8Ohm","Current Rating (Amps)":"55 mA","Height - Seated (Max)":"0.079\\\" (2.00mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1206 (3216 Metric)","Frequency - Self Resonant":"10MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3128","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/23793266b202ae546e5047be20f0e556.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LQH31MN470J03L and get a price?","answer":"Submit an RFQ for current availability and pricing — quotes are confirmed at order time against your BOM quantity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH31MN470J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH31MN470J03L 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}}