{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH31MN4R7K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH31MN4R7K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH31MN4R7K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH31MN4R7K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH31 series drum core wirewound inductor, unshielded, 4.7 µH ±10%, 120 mA, 2.21 Ω DCR, 1206 (3216 metric) SMD, tape and reel.","salesMarkdown":"Murata has flagged the LQH31MN4R7K03L as Last Buy — the manufacturer's final production run is in progress or closed, and once existing stock is exhausted, no further units will be manufactured. For a BOM that depends on this 4.7 µH unshielded inductor, the procurement decision is time-sensitive: secure last-time-buy inventory now through independent distribution, or qualify a replacement before the supply dries up. ## Parametric anchor: 4.7 µH, 120 mA, 2.21 Ω DCR Rated at 120 mA DC, the 2.21 Ω max DCR sets the self-heating limit: at full current, I²R loss is about 32 mW, well within the 1206 body's dissipation capability for a 70°C ambient rise. The self-resonant frequency of 31 MHz is well above the test frequency — this inductor behaves as a pure inductance up to roughly 10 MHz, making it suitable for DC-DC converter output filters and bias-T circuits in that band. ## Q factor and core material — signal integrity context A Q of 35 at 8 MHz is modest — typical for a ferrite-core drum inductor in this footprint — and means the AC losses are about 3% of the reactive power at that frequency, which matters for tuned circuits or RF bias networks where the inductor's parasitic resistance broadens the resonance. The unshielded construction means the magnetic field extends beyond the body — keep a 2-3 mm keep-out zone from adjacent sensitive traces or other magnetics to avoid coupling. Supplied on tape and reel (cut tape available), the 1206 package is compatible with automated pick-and-place at standard speeds.","metaTitle":"LQH31MN4R7K03L Murata 4.7 µH Inductor, Last Buy","metaDescription":"Murata LQH31MN4R7K03L drum core wirewound inductor, 4.7 µH, 120 mA, 2.21 Ω DCR, 1206 SMD. Last Buy lifecycle — sourced to order. Request 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":"35 @ 8MHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"4.7 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)":"2.21Ohm Max","Current Rating (Amps)":"120 mA","Height - Seated (Max)":"0.079\\\" (2.00mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1206","Frequency - Self Resonant":"31MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/23793266b202ae546e5047be20f0e556.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to LQH31MN4R7K03L?","answer":"No official pin-compatible successor is listed in Murata's lifecycle record for this specific order code. A functional replacement would need to match the 4.7 µH ±10%, 120 mA, 2.21 Ω DCR, and 1206 footprint — a parametric search across the LQH31 family or other Murata wirewound series is the next step."},{"question":"What compliance documentation does Murata provide for LQH31MN4R7K03L?","answer":"The evidence does not list RoHS, REACH, UL, or IEC certificates for this specific part number. Murata typically provides RoHS compliance data for the LQH31 series; confirm at quote time if documentation is needed for your BOM."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH31MN4R7K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH31MN4R7K03L 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}}