{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43CN331K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43CN331K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43CN331K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43CN331K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 330 µH, ±10%, 100 mA, Unshielded, 1812 (4532 Metric), Surface Mount.","salesMarkdown":"## 330 µH wirewound for filtering and energy storage The LQH43CN331K03L is a Murata drum-core wirewound inductor in the LQH43 series, rated 330 µH ±10% with a 100 mA continuous current limit. The 6.8 Ohm max DC resistance sets the I²R loss at full load — about 68 mW dissipated in the part, which is manageable in the 1812 footprint but worth checking against your thermal budget if the inductor sits near other heat sources. The self-resonant frequency of 3.6 MHz (tested at 1 MHz) means this inductor behaves as an inductor well below that point; above SRF the impedance turns capacitive. For a buck converter switching at 500 kHz or a pi-filter smoothing ripple at a few hundred kHz, you have plenty of margin. Push it past 2 MHz and the effective inductance starts rolling off. ## 1812 SMD package and board integration The ferrite core is unshielded, so keep sensitive traces or other magnetics at least a couple of millimetres away to avoid coupling. Standard reflow profile for a ferrite drum-core; no special bake requirements unless the reel has been exposed to humidity beyond the floor-life spec. The inductance and current ratings are specified at room temperature; expect the DCR to rise by about 0.4% per °C above 25°C, so at 85°C ambient the winding resistance is roughly 8.2 Ohm, increasing the copper loss by about 20%.","metaTitle":"Murata LQH43CN331K03L Inductor, 330 µH, 100 mA, 1812","metaDescription":"Murata LQH43CN331K03L drum core wirewound inductor, 330 µH ±10%, 100 mA rated current, 6.8 Ohm 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) Cut Tape (CT)","Ratings":"-","Q @ Freq":"-","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"330 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)":"6.8Ohm Max","Current Rating (Amps)":"100 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"3.6MHz","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":"What is the DC resistance of LQH43CN331K03L and why does it matter?","answer":"The max DCR is 6.8 Ohm. That is the winding resistance at 25°C; it sets the I²R loss — at 100 mA the copper loss is 68 mW. For a 330 µH inductor in a power filter, that loss is usually acceptable, but if your circuit draws near the rated current continuously, check the temperature rise in your enclosure."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43CN331K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43CN331K03L 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}}