{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN181K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN181K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN181K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN181K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 180 µH, ±10%, 120 mA, Unshielded, 1812 (4532 Metric), Tape & Reel.","salesMarkdown":"## 180 µH unshielded inductor for filtering and bias circuits The Murata LQH43NN181K03L is a drum-core wirewound inductor in the LQH43 series, offering 180 µH inductance with ±10% tolerance in an unshielded 1812 (4532 Metric) surface-mount package. Rated for 120 mA DC current with a maximum DC resistance of 4.5 Ohm, this part is suited for low-to-moderate current filtering, decoupling, and energy storage in power supply rails and signal conditioning circuits. ## Parametric fit: inductance, current, and self-resonant frequency The 180 µH value is tested at 1 MHz and exhibits a self-resonant frequency of 5 MHz — above that frequency the inductor behaves capacitively, so it should be used well below 5 MHz for inductive filtering. Quality factor is 40 at 796 kHz, indicating moderate AC loss at that frequency; the unshielded construction means magnetic flux radiates, so board placement must avoid coupling into adjacent traces or sensitive analog loops. ## Active production, standard package, and sourcing Supplied in tape-and-reel or cut-tape formats, the 1812 footprint is widely supported by pick-and-place equipment and matches standard land patterns for this package size.","metaTitle":"Murata LQH43NN181K03L 180 µH Unshielded Inductor, 120 mA","metaDescription":"Murata LQH43NN181K03L drum core wirewound inductor, 180 µH ±10%, 120 mA, 4.5 Ohm DCR, 1812 SMD. Active production. Request a quote.","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":"40 @ 796kHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"180 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":"LQH43NN","DC Resistance (DCR)":"4.5Ohm Max","Current Rating (Amps)":"120 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"5MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3158","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance and current rating of LQH43NN181K03L?","answer":"It is a 180 µH inductor rated for 120 mA DC current with a maximum DC resistance of 4.5 Ohm, unshielded, in an 1812 SMD package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN181K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN181K03L 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}}