{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN220J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN220J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN220J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN220J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core, Wirewound inductor, 22 µH, ±5%, 320 mA, 940mOhm, unshielded, 1812 (4532 Metric) surface mount.","salesMarkdown":"## 22 µH wirewound — what the ratings mean for the BOM line The LQH43NN220J03L is a 22 µH unshielded wirewound inductor from Murata's LQH43 series, built on a ferrite drum core. The 320 mA current rating is the DC bias at which the inductance typically drops by 10% — staying below this keeps the filtering or energy storage characteristic stable. The 940 mOhm max DCR means I²R losses hit about 96 mW at full rated current, a figure that matters for thermal budgeting in a dense SMD layout. ## Q factor and self-resonant frequency — frequency-domain fit A Q of 35 at 1 MHz tells you this inductor has reasonable efficiency in narrowband tuned circuits around that frequency — think LC filters or impedance matching in the low-MHz range. The self-resonant frequency of 15 MHz is the point where the parasitic capacitance across the winding cancels the inductance; above this the part looks capacitive. For a 22 µH value, a 15 MHz SRF is typical for an unshielded wirewound construction. ## Package and temperature grade — board-fit and environment No shielding means the magnetic field radiates; keep sensitive traces or other magnetics at least a few mm away to avoid coupling.","metaTitle":"Murata LQH43NN220J03L 22 µH Unshielded Inductor, 320 mA","metaDescription":"Murata LQH43NN220J03L 22 µH ±5% unshielded wirewound inductor, 320 mA, 940 mOhm DCR, 1812 SMD. Active production, sourced to order. 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":"35 @ 1MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"22 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)":"940mOhm Max","Current Rating (Amps)":"320 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"15MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance tolerance and test frequency for this inductor?","answer":"The inductance is 22 µH with a ±5% tolerance, tested at 1 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN220J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN220J03L 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}}