{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN821J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN821J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN821J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN821J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 820 µH, ±5%, 60 mA, 20.5 Ohm DCR, Unshielded, 1812 (4532 Metric) Surface Mount.","salesMarkdown":"## 820 µH ferrite-core wirewound for signal filtering The Murata LQH43NN821J03L is a drum-core wirewound inductor in the LQH43 series, delivering 820 µH ±5% in an unshielded 1812 (4532 Metric) SMD package. Rated for 60 mA continuous current with a maximum DC resistance of 20.5 Ohm, it is sized for low-current filtering and decoupling applications where the inductance value matters more than the current handling. ## Q factor and self-resonant frequency The Q factor is 40 at 796 kHz, giving a measure of the inductor's efficiency at that test frequency — higher Q means lower energy loss per cycle in tuned circuits. Self-resonant frequency is 2.2 MHz; above this point the inductor behaves capacitively, so the useful filtering range stops well below that ceiling. Inductance is tested at 1 kHz, confirming the value holds in the low-frequency audio and power-supply ripple band.","metaTitle":"Murata LQH43NN821J03L 820 µH Unshielded Inductor, 60 mA","metaDescription":"Murata LQH43NN821J03L drum core wirewound inductor, 820 µH ±5%, 60 mA, 20.5 Ohm 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":"40 @ 796kHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"820 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)":"20.5Ohm Max","Current Rating (Amps)":"60 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"2.2MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2818","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the 820 µH inductor's DC resistance and current rating?","answer":"Maximum DC resistance is 20.5 Ohm, and the continuous current rating is 60 mA. These two values together set the I²R heating limit — at full rated current the self-heating is roughly 74 mW, well within the package's dissipation capability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN821J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN821J03L 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}}