{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43CN1R0M03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43CN1R0M03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43CN1R0M03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43CN1R0M03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata LQH43 series, Drum Core Wirewound Inductor, 1 µH, ±20%, 1.08 A, 80 mOhm DCR, Unshielded, 1812 (4532 Metric), Surface Mount.","salesMarkdown":"## 1 µH, 1.08 A — the DC bias limit and DCR drive the fit The LQH43CN1R0M03L is a 1 µH drum-core wirewound inductor from Murata's LQH43 series, rated for 1.08 A continuous current with a maximum DC resistance of 80 mOhm. The 1.08 A rating is the saturation-limited DC current — push beyond it and inductance collapses, so budget headroom for the peak current in your DC-DC converter or filter. The 80 mOhm DCR at full load drops about 93 mV and dissipates roughly 93 mW of I²R heat inside the 1812 body. For a 1 µH part at this current, the copper loss dominates the core loss at switching frequencies below a few megahertz. ## Unshielded construction — flux leakage matters for layout This is an unshielded drum-core design — the ferrite core is open on the sides, so magnetic flux couples into nearby traces and components. Keep sensitive analog or RF circuitry at least one part-width away, or expect crosstalk. The self-resonant frequency of 100 MHz means it behaves as an inductor cleanly up to roughly 30-50 MHz in practice; above that parasitic capacitance takes over. The ±20% tolerance is typical for power-grade ferrite inductors — expect the actual inductance at DC bias to be at the low end of the band, especially near 1.08 A.","metaTitle":"Murata LQH43CN1R0M03L 1 µH Inductor, 1.08 A, 1812","metaDescription":"Murata LQH43CN1R0M03L drum core wirewound inductor, 1 µH ±20%, 1.08 A, 80 mOhm DCR, 100 MHz SRF, 1812 package. Active. Request a quote.","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":"±20%","Inductance":"1 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)":"80mOhm Max","Current Rating (Amps)":"1.08 A","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~85°C","Supplier Device Package":"1812","Frequency - Self Resonant":"100MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4500","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/285342e99fdeeb4e955f855a995fa4ac.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LQH43CN1R0M03L and get a price?","answer":"We source this active Murata part through authorized and independent distribution. Submit an RFQ with your target quantity and we'll confirm availability and current pricing. No stock-holding claim — quoted per order."},{"question":"What is LQH43CN1R0M03L's self-resonant frequency and why does it matter?","answer":"The self-resonant frequency is 100 MHz. Above that frequency the inductor's parasitic capacitance dominates and it behaves as a capacitor. For a 1 µH part, the useful inductive range typically extends to about 30-50 MHz depending on the circuit impedance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43CN1R0M03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43CN1R0M03L 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}}