{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43CN3R3M33L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43CN3R3M33L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43CN3R3M33L","factsUrl":"https://icboms.com/api/mcp/products/LQH43CN3R3M33L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, unshielded, 3.3 µH ±20%, 1.65 A, 99 mOhm DCR, 1812 (4532 Metric) surface mount.","salesMarkdown":"## What the 1.65 A rating means on a 3.3 µH part The Murata LQH43CN3R3M33L is a drum core wirewound inductor in the LQH43 series, built on a ferrite core and unshielded. The headline numbers are 3.3 µH ±20% at 1 MHz test frequency, with a current rating of 1.65 A and a maximum DC resistance of 99 mOhm. That 1.65 A is the saturation or heating limit — whichever hits first — so in a buck converter feeding a 1 A load, this part runs with margin. The self-resonant frequency sits at 47 MHz, which tells you the useful band stops well before that; above SRF the inductor looks capacitive. ## 1812 footprint and what it connects to The 1812 (4532 Metric) package is a standard SMD footprint — 4.50 mm x 3.20 mm, seated height 2.80 mm max. No shielding, so keep it away from sensitive analog traces or other magnetics on the same layer; the unshielded field couples into adjacent copper. The ferrite core handles the flux path, but the fringing field will induce eddy currents in a ground plane poured underneath — leave a keep-out zone under the body if the layout is tight. ## Temperature range and field survival If the board sits inside a vented enclosure near a 60°C ambient, the inductor's self-heating from the 1.65 A current plus the ambient stays under the 85°C ceiling as long as the DCR losses are within the datasheet curve. No AEC-Q grade here, so skip it for under-hood or engine-bay duty.","metaTitle":"Murata LQH43CN3R3M33L 3.3 µH Unshielded Inductor, 1.65 A","metaDescription":"Murata LQH43CN3R3M33L drum core wirewound inductor, 3.3 µH ±20%, 1.65 A, 99 mOhm DCR, 1812 SMD. Active production, sourced per RFQ.","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":"-","Shielding":"Unshielded","Tolerance":"±20%","Inductance":"3.3 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)":"99mOhm Max","Current Rating (Amps)":"1.65 A","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~85°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"47MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2530","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LQH43CN3R3M33L and get a price?","answer":"Send your target quantity and we confirm current pricing and lead time at quote — no stock-holding claim, just a confirmed line-item price."},{"question":"What is the closest alternative to LQH43CN3R3M33L?","answer":"For a functional alternative, search the 1812 footprint with 3.3 µH ±20%, 1.65 A minimum current rating, and unshielded construction — several inductor manufacturers cover this parametric slot."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43CN3R3M33L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43CN3R3M33L 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}}