{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43CN330K03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43CN330K03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43CN330K03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43CN330K03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 33 µH, ±10%, 310 mA, 1 Ω DCR, Unshielded, 1812 (4532 Metric), Surface Mount.","salesMarkdown":"## 33 µH drum core for DC-DC filtering and signal conditioning The Murata LQH43CN330K03L is a 33 µH unshielded wirewound inductor in the LQH43 series, built on a ferrite core. It is rated for 310 mA continuous current with a maximum DC resistance of 1 Ω, making it a fit for power rail filtering, DC-DC converter output chokes, and signal-line noise suppression where moderate inductance and current are needed. The self-resonant frequency of 12 MHz sets the usable band — above that the inductor behaves capacitively, so keep switching frequencies well below 12 MHz to maintain inductive impedance. The 1 Ω DCR at 310 mA means about 96 mW of copper loss at full rated current, which is manageable in a 1812 footprint but worth factoring into thermal budget for dense boards. ## 1812 footprint and surface-mount assembly The unshielded construction means magnetic flux couples into nearby traces — keep sensitive analog or RF routing at least one part width away, or shield the inductor with a ground plane on the layer below. Supplied on tape and reel (cut tape available), compatible with standard pick-and-place. The ferrite core material is not moisture-sensitive per typical MSL 1, so no dry-bake is required before reflow — store the reels in ambient conditions and they are ready for the line.","metaTitle":"Murata LQH43CN330K03L 33 µH Unshielded Inductor, 310 mA","metaDescription":"Murata LQH43CN330K03L drum core wirewound inductor, 33 µH ±10%, 310 mA, 1 Ω DCR, 12 MHz SRF. Active production, surface mount 1812. 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) Cut Tape (CT)","Ratings":"-","Q @ Freq":"-","Shielding":"Unshielded","Tolerance":"±10%","Inductance":"33 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)":"1Ohm Max","Current Rating (Amps)":"310 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"12MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3800","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/285342e99fdeeb4e955f855a995fa4ac.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the self-resonant frequency and why does it matter?","answer":"The self-resonant frequency is 12 MHz. Above this frequency the inductor behaves as a capacitor, so the part should be used in circuits where the fundamental switching or signal frequency is well below 12 MHz to maintain inductive behavior."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43CN330K03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43CN330K03L 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}}