{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH31MN1R0K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH31MN1R0K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH31MN1R0K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH31MN1R0K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH31 series, Drum Core Wirewound Inductor, 1 µH, ±10%, 175 mA, 637 mOhm DCR, 1206 (3216 Metric), Surface Mount, Unshielded.","salesMarkdown":"## 1 µH wirewound, 1206 footprint The Murata LQH31MN1R0K03L is a 1 µH drum-core wirewound inductor in the LQH31 series, built on a ferrite core and unshielded. It is rated for 175 mA continuous current with a maximum DC resistance of 637 mOhm — the DCR sets the I²R heating limit, so at full rated current the self-heating is roughly 19.5 mW, well within the 1206 package's dissipation capability. ## Q factor and self-resonant frequency A Q factor of 35 at 10 MHz tells you the inductor's efficiency at that frequency — the ratio of stored energy to lost energy per cycle. The self-resonant frequency is 100 MHz, so the inductor behaves inductively up to that point; above it, parasitic capacitance between windings dominates and the impedance turns capacitive. For a 1 µH part, 100 MHz SRF is typical for this core and winding geometry. ## Last Buy — sourcing reality This part carries a Last Buy lifecycle status from Murata. That means the manufacturer has announced end-of-life — the last production run is in progress or complete. Sourcing goes through independent distribution: quantities are confirmed at RFQ, and the stock is genuine, traceable Murata inventory. If you are qualifying a new design, look for a current-production 1 µH wirewound in the same 1206 footprint; if this is a BOM fill for an existing build, we can source it against your quantity. ## Physical fit — 1206 SMD It is unshielded, so keep magnetic-sensitive traces or components at least a few mm away — the stray field from an unshielded drum core can couple into adjacent loops. Operating temperature range is -40°C to 85°C, covering most indoor and outdoor equipment but not extended automotive under-hood environments.","metaTitle":"Murata LQH31MN1R0K03L 1 µH Unshielded Inductor, 175 mA","metaDescription":"Murata LQH31MN1R0K03L wirewound drum core inductor, 1 µH ±10%, 175 mA, 637 mOhm DCR, 1206 SMD. Last Buy lifecycle — sourced to order against an 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 @ 10MHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"1 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)":"637mOhm Max","Current Rating (Amps)":"175 mA","Height - Seated (Max)":"0.079\\\" (2.00mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1206","Frequency - Self Resonant":"100MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/23793266b202ae546e5047be20f0e556.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LQH31MN1R0K03L?","answer":"We source LQH31MN1R0K03L through independent distribution channels. Since this is a Last Buy part, quantities are limited to existing surplus and broker inventory — submit your BOM quantity for a real-time sourcing check."},{"question":"What is the inductance and current rating of LQH31MN1R0K03L?","answer":"It is a 1 µH inductor with a ±10% tolerance, rated for 175 mA continuous current. The DC resistance is 637 mOhm maximum, which determines the self-heating at that current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH31MN1R0K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH31MN1R0K03L 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}}