{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN182J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN182J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN182J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN182J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 1.8 mH, ±5%, 35 mA, 45 Ohm DCR, Unshielded, 1812 (4532 Metric) SMD.","salesMarkdown":"## 1.8 mH wirewound for low-frequency filtering The Murata LQH43NN182J03L is a drum-core wirewound inductor with 1.8 mH inductance at 1 kHz test frequency — a high-value part suited for DC line filtering, LC tank circuits, or noise suppression in audio and low-frequency power rails. Rated for 35 mA continuous current with a maximum DC resistance of 45 Ohm — the DCR is the thermal bottleneck; at full rated current the internal power dissipation is roughly 55 mW, which is manageable in the 1812 footprint but leaves no headroom for ripple current. ## Q factor and self-resonant ceiling Q factor is 40 at 252 kHz — this is a moderate Q for a wirewound of this inductance; the inductor is usable in resonant circuits up to about 500 kHz before the Q rolls off significantly. Self-resonant frequency is 1.5 MHz — above this point the inductor behaves as a capacitor, so the part is not useful as an inductor above roughly 1 MHz. ## Package, footprint, and temperature range The ferrite core is unshielded, so magnetic coupling to adjacent components is possible; keep a 2–3 mm keep-out zone around the part on the PCB layout. ## Sourcing and lifecycle posture The base product number LQH43NN covers a family of 1812 wirewound inductors with different inductance values — if the BOM calls for a different value, the same footprint and package apply.","metaTitle":"Murata LQH43NN182J03L 1.8 mH Unshielded Inductor, 35 mA","metaDescription":"Murata LQH43NN182J03L drum core wirewound inductor, 1.8 mH ±5%, 35 mA, 45 Ohm DCR, 1812 SMD. Active production, RFQ for availability.","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 @ 252kHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"1.8 mH","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)":"45Ohm Max","Current Rating (Amps)":"35 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"1.5MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the LQH43NN182J03L's inductance and current rating?","answer":"The inductance is 1.8 mH at 1 kHz test frequency with ±5% tolerance. The DC current rating is 35 mA continuous."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN182J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN182J03L 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}}