{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43PB4R7M26L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43PB4R7M26L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43PB4R7M26L","factsUrl":"https://icboms.com/api/mcp/products/LQH43PB4R7M26L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series, Drum Core Wirewound, Shielded, 4.7 µH, ±20%, 780 mA, 90mOhm DCR, 1812 (4532 Metric), Surface Mount.","salesMarkdown":"## DC bias and saturation headroom for power rail filtering The LQH43PB4R7M26L is a 4.7 µH shielded wirewound inductor from Murata's LQH43 series, rated for 780 mA continuous current with a 90 mOhm max DCR. That DCR at 780 mA produces about 55 mW of I²R loss — well within the 1812 package's dissipation capability at 85°C ambient, but worth checking if the inductor sits next to a hot regulator. The 1.4 A saturation current (Isat) is the point where inductance typically drops by 30%. With a 780 mA rated current, you have roughly 80% headroom to Isat — enough to handle the inductor current ripple plus a 20% load transient without the inductance collapsing into the noise floor of a buck converter's current loop. ## Shielding and frequency limits in a dense layout The ferrite core and shield contain the magnetic flux — important when this inductor shares a board with a 2.4 GHz radio front-end or a precision ADC. Without the shield, the fringing field from an unshielded drum core would couple into nearby traces and shift the converter's switching noise spectrum into the signal band. Self-resonant frequency is 35 MHz. Below that the part behaves as an inductor; above it the winding capacitance dominates and the impedance rolls off. For a 500 kHz to 2 MHz switching regulator, this SRF is comfortably above the switching harmonics — but if you are using it as a DC bias choke for a 10 MHz signal path, check that the fundamental and first few harmonics stay under 35 MHz. ## Temperature grade and board-fit dimensions A DC-DC converter in an engine bay ECU that sees 105°C on the PCB still has 20°C of margin before the inductor's rated ceiling. The ferrite core material's permeability will drift with temperature, but the inductance tolerance of ±20% already accounts for that shift across the band.","metaTitle":"Murata LQH43PB4R7M26L 4.7 µH Shielded Power Inductor, 780 mA","metaDescription":"Murata LQH43PB4R7M26L 4.7 µH shielded wirewound inductor, 780 mA rated current, 90 mOhm DCR, 1812 footprint. 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":"Shielded","Tolerance":"±20%","Inductance":"4.7 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":"LQH43PB","DC Resistance (DCR)":"90mOhm Max","Current Rating (Amps)":"780 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C~125°C","Supplier Device Package":"1812 (4532 Metric)","Frequency - Self Resonant":"35MHz","Current - Saturation (Isat)":"1.4A","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3746","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the DC resistance of LQH43PB4R7M26L and why does it matter for my power supply?","answer":"The DCR is 90 mOhm max. At the 780 mA rated current, that produces about 55 mW of I²R loss. In a 2 A peak-current buck converter, the loss doubles to roughly 360 mW — enough to raise the inductor temperature by 15-20°C above ambient if the PCB copper pour under the 1812 pad is small. Check the derating at your actual RMS current, not the peak."},{"question":"What is the closest pin-compatible alternative to LQH43PB4R7M26L in the same footprint?","answer":"The 1812 (4532 Metric) footprint is a standard size shared by many shielded 4.7 µH inductors. However, the DCR and saturation current vary — always compare the 90 mOhm DCR and 1.4 A Isat against the alternative's specs before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43PB4R7M26L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43PB4R7M26L 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}}