{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43CN221K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43CN221K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43CN221K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43CN221K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound inductor, 220 µH, ±10%, 110 mA, 4 Ohm max DCR, Unshielded, 1812 (4532 Metric), Surface Mount.","salesMarkdown":"## 220 µH wirewound in 1812 — what the ratings mean for your filter or DC-DC stage The LQH43CN221K03L is a 220 µH unshielded drum-core wirewound inductor from Murata's LQH43 series, housed in the 1812 (4532 Metric) surface-mount package. Its 110 mA current rating and 4 Ω max DCR set the conduction loss and saturation floor for the DC bias it can handle in a power rail or signal filter. The 4.5 MHz self-resonant frequency (SRF) means the inductor behaves inductively up to that point; above it, parasitic capacitance dominates and the impedance rolls off. For a buck converter switching at 500 kHz or a low-pass filter below 2 MHz, this part stays well within its inductive region. Unshielded construction means the magnetic field radiates into the surrounding board area — keep sensitive analog traces or other magnetics at least one package width away to avoid coupling. The ferrite core material handles the 220 µH value with a ±10% tolerance, tested at 1 MHz.","metaTitle":"Murata LQH43CN221K03L 220µH Unshielded Wirewound Inductor","metaDescription":"Murata LQH43CN221K03L 220 µH ±10% unshielded wirewound inductor in 1812 package. 110 mA rated, 4 Ω max DCR, 4.5 MHz SRF. Active production, available to order.","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":"-","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"220 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":"LQH43CN","DC Resistance (DCR)":"4Ohm Max","Current Rating (Amps)":"110 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"4.5MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/285342e99fdeeb4e955f855a995fa4ac.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LQH43CN221K03L and how do I get a price?","answer":"The LQH43CN221K03L is an active Murata part available through authorized distribution."},{"question":"What is the closest pin-compatible alternative to LQH43CN221K03L in this inductor family?","answer":"The LQH43 series shares the same 1812 footprint across multiple inductance values, so a different value (e.g., 100 µH or 330 µH) would physically fit but change the circuit's filtering or energy-storage characteristic. Confirm the BOM's required inductance before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43CN221K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43CN221K03L 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}}