{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43CN3R9M33L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43CN3R9M33L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43CN3R9M33L","factsUrl":"https://icboms.com/api/mcp/products/LQH43CN3R9M33L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 3.9 µH, ±20%, 1.6 A, 107 mOhm DCR, Unshielded, 1812 (4532 Metric) SMD, Tape & Reel.","salesMarkdown":"## Active production and sourcing posture The LQH43CN3R9M33L: For volume purchases, pricing and lead time are confirmed at the time of an RFQ against the specific BOM quantity. ## What the 3.9 µH and 1.6 A ratings mean for your power rail This is a 3.9 µH drum-core wirewound inductor in the LQH43 series, unshielded. The 1.6 A current rating is the DC current at which the inductance typically drops by 10% due to core saturation — not the thermal limit. The self-resonant frequency of 40 MHz is the point where the inductor's parasitic capacitance cancels its inductance. For a buck converter switching at 500 kHz, this is well above the fundamental, so the inductor behaves as a pure inductance at the switching frequency. The unshielded construction means the flux field extends outside the body — keep sensitive traces or ferrite materials at least 5 mm away to avoid coupling. ## Board-fit and footprint check The ferrite core material and wirewound construction give it a higher Q and current handling than a multilayer ferrite bead of the same size, but the unshielded nature means it radiates a magnetic field — not ideal for tight layouts near RF or precision analog stages without a ground plane underneath.","metaTitle":"LQH43CN3R9M33L Murata 3.9 µH 1.6 A Drum Core Inductor","metaDescription":"Active LQH43CN3R9M33L from Murata Electronics. 3.9 µH, 1.6 A, 107 mOhm DCR, 1812 SMD, unshielded. Available to order through independent distribution.","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)","Ratings":"-","Q @ Freq":"-","Shielding":"Unshielded","Tolerance":"±20%","Inductance":"3.9 µH","Mounting Type":"Surface Mount","Package / Case":"1812 (4532 Metric)","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.177\\\" L x 0.126\\\" W (4.50mm x 3.20mm)","Base Product Number":"LQH43CN","DC Resistance (DCR)":"107mOhm Max","Current Rating (Amps)":"1.6 A","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"40MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e4ffd95d57b880d736712d74c6ca4549.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43CN3R9M33L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43CN3R9M33L 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}}