{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43MN180J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43MN180J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43MN180J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43MN180J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 18 µH, ±5%, 340 mA, 820 mOhm DCR, Unshielded, 1812 (4532 Metric) SMD.","salesMarkdown":"## 18 µH wirewound inductor for general-purpose filtering and DC-DC smoothing The Murata LQH43MN180J03L is a drum core wirewound inductor in the LQH43 series, offering 18 µH inductance with ±5% tolerance. It is rated for 340 mA continuous current and has a maximum DC resistance of 820 mOhm. The unshielded construction and ferrite core make it a straightforward choice for power supply filtering, DC-DC converter output smoothing, and general signal conditioning where magnetic coupling is not a concern. ## Self-resonant frequency and Q factor define the usable band With a self-resonant frequency of 17 MHz, the inductor behaves as an inductor well below that point; above it, parasitic capacitance dominates and the impedance drops. The Q factor of 35 at 1 MHz indicates moderate energy storage efficiency at that test frequency. The 820 mOhm DCR sets the I²R loss at 340 mA to about 95 mW — acceptable for most board-level applications, but worth checking against the thermal budget in a dense layout.","metaTitle":"Murata LQH43MN180J03L Inductor, 18 µH, 340 mA, 1812","metaDescription":"Murata LQH43MN180J03L drum core wirewound inductor, 18 µH ±5%, 340 mA, 820 mOhm DCR, unshielded, 1812 SMD. Active production, order via RFQ.","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":"LQH43","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Q @ Freq":"35 @ 1MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"18 µH","Mounting Type":"Surface Mount","Package / Case":"1812 (4532 Metric)","Product Status":"Active","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.177\\\" L x 0.126\\\" W (4.50mm x 3.20mm)","Base Product Number":"LQH43MN","DC Resistance (DCR)":"820mOhm Max","Current Rating (Amps)":"340 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"17MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1493e4ce66984c31e9b5c6bbb04d9e5.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43MN180J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43MN180J03L 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}}