{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH31MN390J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH31MN390J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH31MN390J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH31MN390J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH31 series, Drum Core Wirewound Inductor, 39 µH, ±5%, 55 mA, Unshielded, 7.2 Ohm DCR, 1206 (3216 Metric), Surface Mount.","salesMarkdown":"## Drum-core wirewound for filtering and decoupling The Murata LQH31MN390J03L is a 39 µH unshielded wirewound inductor in the LQH31 series, built on a ferrite drum core. It is a surface-mount component in the 1206 (3216 Metric) footprint, suited for general-purpose filtering, DC-DC output smoothing, and signal decoupling where the 55 mA current rating and 7.2 Ohm DCR fit the load budget. ## Frequency response and Q factor The self-resonant frequency is 11 MHz, above which the inductor behaves capacitively — keep the operating frequency well below this for inductive impedance. The Q factor is 40 at 2.5 MHz, indicating moderate energy storage efficiency in the low-MHz range, typical for a ferrite-core wirewound part. The unshielded construction means magnetic flux radiates from the core — keep sensitive traces or other magnetics at least a few millimetres away to avoid coupling. ## Temperature grade and operating range The ferrite core material maintains inductance stability across this range, though DCR increases with temperature — budget the 7.2 Ohm cold value plus the copper temperature coefficient when calculating I²R losses at the high end.","metaTitle":"Murata LQH31MN390J03L 39 µH Unshielded Wirewound Inductor","metaDescription":"Murata LQH31MN390J03L drum core wirewound inductor, 39 µH ±5%, 55 mA, 7.2 Ohm DCR, 1206 package, -40°C to +85°C. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Inductors & Chokes"],"specifications":{"Mfr":"Murata Electronics","Type":"Drum Core, Wirewound","Series":"LQH31","Package":"Tape & Reel (TR)","Ratings":"-","Q @ Freq":"40 @ 2.5MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"39 µH","Mounting Type":"Surface Mount","Package / Case":"1206 (3216 Metric)","Product Status":"Active","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)":"7.2Ohm","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":"11MHz","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":"How can I order LQH31MN390J03L or check availability?","answer":"This part is sourced to order against an RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH31MN390J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH31MN390J03L when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}