{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43MN122K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43MN122K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43MN122K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43MN122K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, unshielded, 1.2 mH ±10%, 45 mA rated current, 30 Ohm DCR, 1812 (4532 Metric) SMD package.","salesMarkdown":"## 1.2 mH drum core for bias and filtering The Murata LQH43MN122K03L is a wirewound drum core inductor in the LQH43 series, delivering 1.2 mH inductance in an unshielded 1812 (4532 Metric) surface-mount package. Rated for 45 mA continuous current with a maximum DC resistance of 30 Ohm, this part is sized for low-power bias lines, filter chokes, and decoupling networks where the inductance dominates over current handling. The self-resonant frequency of 1.8 MHz sets the usable band ceiling — above that the inductor behaves capacitively, so keep the operating frequency below 1.8 MHz for inductive response. A Q factor of 40 at 252 kHz indicates moderate efficiency at low frequencies, typical for a ferrite-core drum coil at this inductance value. ## Footprint and temperature envelope Inductance is tested at 1 kHz, which is the standard low-frequency reference for power inductors — the actual inductance at the operating frequency will differ due to core permeability roll-off.","metaTitle":"Murata LQH43MN122K03L Drum Core Inductor, 1.2 mH, 45 mA","metaDescription":"Murata LQH43MN122K03L wirewound drum core inductor, 1.2 mH ±10%, 45 mA rated current, 30 Ohm DCR. 1812 SMD package, active production. Quoted 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)","Ratings":"-","Q @ Freq":"40 @ 252kHz","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"1.2 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":"LQH43MN","DC Resistance (DCR)":"30Ohm Max","Current Rating (Amps)":"45 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"1.8MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2225","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1493e4ce66984c31e9b5c6bbb04d9e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance tolerance of LQH43MN122K03L?","answer":"The inductance tolerance is ±10% at 1.2 mH."},{"question":"Is LQH43MN122K03L shielded or unshielded?","answer":"It is an unshielded drum core design — the magnetic field radiates from the coil, so adjacent traces or components on the same layer may couple noise. Keep sensitive routing at least one component height away."},{"question":"What is the DC resistance of LQH43MN122K03L?","answer":"Maximum DC resistance is 30 Ohm, which at 45 mA produces a 60 mW I²R loss — negligible for most bias circuits but worth checking against the thermal budget in a dense layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43MN122K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43MN122K03L 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}}