{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN222K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN222K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN222K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN222K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 2.2 mH, ±10%, 30 mA, 50 Ohm DCR, Unshielded, 1812 (4532 Metric) SMD.","salesMarkdown":"## 2.2 mH at 30 mA — where the DC bias ceiling sits The LQH43NN222K03L is a Murata drum-core wirewound inductor in the LQH43 series, delivering 2.2 mH ±10% inductance in an 1812 (4532 Metric) SMD package. Rated at 30 mA DC, the current rating is the point where the inductance typically drops by 10% due to core saturation — exceeding it collapses the inductance and the filtering stops working. The 50 Ohm maximum DC resistance means at 30 mA the self-heating is roughly 45 mW (I²R), negligible for most boards, but the voltage drop across the inductor at that current is 1.5 V — a factor if the rail margin is tight. ## Q factor and self-resonant frequency — where it actually works Q factor is 40 at 252 kHz — this is the sweet spot for AC loss; above or below that frequency the Q drops and the inductor dissipates more signal energy as heat. Self-resonant frequency is 1.3 MHz — above this the part behaves capacitively, not inductively. Keep the operating frequency below 1.3 MHz to stay in the inductive region. Unshielded construction means the magnetic field radiates freely — place it at least one part-width away from sensitive analog traces or other magnetics to avoid coupling.","metaTitle":"Murata LQH43NN222K03L Inductor, 2.2 mH, 30 mA, 1812","metaDescription":"Murata LQH43NN222K03L drum core wirewound inductor, 2.2 mH ±10%, 30 mA rated current, 50 Ohm DCR, 1812 SMD. Active lifecycle. 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 @ 252kHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"2.2 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)":"50Ohm Max","Current Rating (Amps)":"30 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~85°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"1.3MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 kHz"}},"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 and current rating of LQH43NN222K03L?","answer":"Inductance is 2.2 mH ±10%, and the DC current rating is 30 mA. The DC resistance is 50 Ohm maximum, and the self-resonant frequency is 1.3 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN222K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN222K03L 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}}