{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43MN122J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43MN122J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43MN122J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43MN122J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 1.2 mH, 45 mA, 30 Ohm DCR, ±5%, Unshielded, 1812 (4532 Metric), Surface Mount.","salesMarkdown":"## 1.2 mH ferrite drum core — what the ratings mean for the BOM The LQH43MN122J03L is a 1.2 mH unshielded wirewound inductor on a ferrite core in the 1812 (4532 Metric) surface-mount package. The 45 mA current rating is the DC current at which the inductance typically drops by 10% — stay below this for the nominal value to hold. The 30 Ohm max DCR means a 1.35 V drop at full rated current, which matters for low-voltage rails where the inductor's series resistance eats into the supply margin. The self-resonant frequency of 1.8 MHz sets the upper bound for useful filtering — above this the inductor behaves capacitively. The Q factor of 40 at 252 kHz tells you the loss tangent in a tuned filter or resonant tank at that frequency; a higher Q means sharper selectivity and less heating in the core. ## Temperature range and storage reality The ferrite core material's permeability drifts with temperature; the inductance tolerance (±5%) includes this drift across the full range. ## Package footprint and board-fit note The unshielded construction means the magnetic field extends beyond the package — keep sensitive traces or other magnetics at least one body width away to avoid coupling. Standard reflow profile for ferrite-core inductors applies; the component is not moisture-sensitive per typical Murata handling, but store reels in a dry environment below 30°C to prevent oxidation on the termination pads.","metaTitle":"Murata LQH43MN122J03L 1.2 mH Inductor, 45 mA, 1812","metaDescription":"Murata LQH43MN122J03L drum core wirewound inductor, 1.2 mH ±5%, 45 mA, 30 Ohm DCR, 1812 SMD. Active lifecycle. 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":"±5%","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":"$0.3036","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d1493e4ce66984c31e9b5c6bbb04d9e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance and current rating of LQH43MN122J03L?","answer":"Inductance is 1.2 mH at 1 kHz test frequency, ±5% tolerance. The DC current rating is 45 mA — the current at which inductance typically drops 10% from the nominal value. Maximum DC resistance is 30 Ohms."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43MN122J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43MN122J03L 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}}