{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NN2R7M03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NN2R7M03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NN2R7M03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NN2R7M03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, 2.7 µH, 500 mA, ±20%, 320 mOhm DCR, 53 MHz SRF, unshielded, 1812 (4532 Metric) surface mount.","salesMarkdown":"## 2.7 µH drum core inductor for power and signal filtering The Murata LQH43NN2R7M03L is a drum core, wirewound inductor in the LQH43 series, rated 2.7 µH at 1 MHz test frequency with ±20% tolerance. It carries a continuous current rating of 500 mA, which is the DC current at which the inductance drop and temperature rise remain within the datasheet limits. Maximum DC resistance of 320 mOhm defines the I²R conduction loss at full load — at 500 mA the self-heating is roughly 80 mW, which is manageable in a standard 1812 footprint but should be factored into the thermal budget for dense boards. The unshielded construction means magnetic flux radiates from the core — adjacent traces carrying sensitive analog signals or high-impedance nodes should be kept at least one body width away to avoid coupling. ## Frequency response and Q factor Self-resonant frequency of 53 MHz sets the upper bound for inductive behaviour — above this frequency the parasitic capacitance dominates and the component behaves as a capacitor. For power rail filtering, keep the ripple frequency below 10-15 MHz to stay well within the inductive region. Q factor of 20 at 1 MHz gives a measure of the inductor's AC loss in resonant or filter circuits — higher Q means narrower bandwidth and less energy dissipated per cycle. For a simple LC filter at 1 MHz, the -3 dB bandwidth is approximately f₀/Q, or about 50 kHz. ## Active production and sourcing posture For BOM placement, the part is sourced to order against the required quantity.","metaTitle":"Murata LQH43NN2R7M03L Drum Core Inductor, 2.7 µH, 500 mA","metaDescription":"Murata LQH43NN2R7M03L drum core wirewound inductor, 2.7 µH ±20%, 500 mA rated current, 320 mOhm DCR, 53 MHz SRF. Active production, sourced 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":"20 @ 1MHz","Shielding":"Unshielded","Tolerance":"±20%","Inductance":"2.7 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":"LQH43NN","DC Resistance (DCR)":"320mOhm Max","Current Rating (Amps)":"500 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"53MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2818","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d0d6b1d39c76e30b3c05600906460c39.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance and current rating of LQH43NN2R7M03L?","answer":"The inductor is rated 2.7 µH at 1 MHz test frequency with ±20% tolerance and carries a continuous current rating of 500 mA. Maximum DC resistance is 320 mOhm."},{"question":"What is the self-resonant frequency of this inductor?","answer":"The self-resonant frequency is 53 MHz, which is the frequency at which the inductor's parasitic capacitance cancels the inductance — above this frequency the part behaves capacitively."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NN2R7M03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NN2R7M03L 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}}