{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH31HNR61J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH31HNR61J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH31HNR61J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH31HNR61J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH31 series drum core wirewound inductor, 610 nH, ±5%, 250 mA, 624 mOhm DCR, 240 MHz SRF, 1206 (3216 Metric) package.","salesMarkdown":"## 610 nH wirewound inductor for RF and bias-T applications The Murata LQH31HNR61J03L is a drum core, wirewound inductor in the LQH31 series, offering 610 nH ±5% inductance in a standard 1206 (3216 Metric) surface-mount package. Rated for 250 mA continuous current with a maximum DC resistance of 624 mOhm, this part is sized for RF bias feeds, impedance matching networks, and low-current filtering where the DCR contributes a 156 mV drop at full rated current. ## Self-resonant ceiling and Q factor A self-resonant frequency of 240 MHz places the usable inductance band well below that ceiling — for RF designers, the inductor behaves inductively up to roughly 80% of SRF, so this part is a solid choice for VHF-band matching up to about 190 MHz. The Q factor of 60 at 100 MHz indicates moderate efficiency in resonant tank circuits; the loss tangent at that frequency is low enough for narrowband RF front-end filtering but not for high-Q oscillator tanks where Q > 100 is typically required. ## Unshielded construction and layout implications This is an unshielded inductor, meaning the magnetic field radiates from the drum core. In a dense RF layout, keep sensitive traces and ground pours at least one part width away to avoid parasitic coupling — the 3.20 × 1.60 mm footprint gives about 3 mm clearance for a 20 dB isolation rule of thumb. The ferrite core material provides stable inductance over temperature but saturates at a lower DC bias than an air-core; the 250 mA rating already accounts for the saturation knee at room temperature. ## Last Buy lifecycle — sourcing reality Murata has marked the LQH31HNR61J03L as Last Buy, meaning official production is ending and no further factory orders are being accepted. No official successor or pin-compatible alternative is recorded for this order code. For a BOM line requiring this exact inductance, tolerance, and package, the available surplus inventory is the primary supply path.","metaTitle":"Murata LQH31HNR61J03L 610 nH Wirewound Inductor, 250 mA","metaDescription":"Murata LQH31HNR61J03L drum core wirewound inductor, 610 nH ±5%, 250 mA, 1206 package. Last Buy status — sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Inductors & Chokes"],"specifications":{"Mfr":"Murata Electronics","Type":"Drum Core, Wirewound","Series":"LQH31","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Q @ Freq":"60 @ 100MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"610 nH","Mounting Type":"Surface Mount","Package / Case":"1206 (3216 Metric)","Product Status":"Last Time Buy","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.063\\\" W (3.20mm x 1.60mm)","Base Product Number":"LQH31HN","DC Resistance (DCR)":"624mOhm Max","Current Rating (Amps)":"250 mA","Height - Seated (Max)":"0.079\\\" (2.00mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1206 (3216 Metric)","Frequency - Self Resonant":"240MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e25d4379cfb80e731ed5285aac1d8b5e.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the LQH31HNR61J03L's inductance and current rating?","answer":"610 nH ±5% with a 250 mA continuous current rating. The DC resistance is 624 mOhm max, which produces a 156 mV voltage drop at full rated current."},{"question":"Is the LQH31HNR61J03L shielded or unshielded?","answer":"Unshielded. The drum core construction means the magnetic field extends outside the component body — layout must account for coupling to nearby traces and components."},{"question":"What is the self-resonant frequency of this Murata inductor?","answer":"240 MHz. The inductance is usable up to roughly 190 MHz before the parasitic capacitance dominates and the component becomes capacitive."},{"question":"Can I still buy the LQH31HNR61J03L?","answer":"Yes, through independent distribution channels. Murata has classified this part as Last Buy, so remaining inventory is sourced to order against an RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH31HNR61J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH31HNR61J03L when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}