{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH31MN270J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH31MN270J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH31MN270J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH31MN270J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH31 series, Drum Core Wirewound Inductor, 27 µH, ±5%, 85 mA, 3.4 Ohm DCR, 1206 (3216 Metric), Unshielded, Ferrite Core.","salesMarkdown":"## 27 µH wirewound for DC-DC filtering and bias-T networks The Murata LQH31MN270J03L is a drum-core wirewound inductor in the LQH31 series, wound on a ferrite core and terminated in a 1206 (3216 metric) SMD package. Its 27 µH inductance at 1 MHz test frequency, ±5% tolerance, suits it for DC-DC converter output filtering, bias-T decoupling, and low-current signal conditioning where a predictable inductance value matters more than the highest saturation current. ## Rated current and DCR — the real limits on the BOM line Rated at 85 mA continuous, this is the current at which the inductance typically drops by 10% from the nominal value due to core saturation — stay below this figure in the steady-state load to keep the filter corner frequency where the simulation expects it. DC resistance is 3.4 Ohm, which at 85 mA drops 289 mV across the part and dissipates 24.6 mW — negligible for the board thermal budget, but the voltage drop matters if the inductor sits in a low-voltage rail where every millivolt counts. Self-resonant frequency is 13 MHz; above that the impedance becomes capacitive, so this part is best kept below 10 MHz in a switching regulator or filter application. The Q factor is 40 at 2.5 MHz, indicating moderate AC loss in that band. ## Active production and sourcing posture Operating temperature range is -40°C to +85°C, which covers most indoor and outdoor telecom, industrial control, and consumer equipment but does not reach the +105°C or +125°C grades needed for under-hood automotive or high-ambient power supplies.","metaTitle":"Murata LQH31MN270J03L Drum Core Inductor, 27 µH, 85 mA","metaDescription":"Murata LQH31MN270J03L wirewound ferrite inductor, 27 µH ±5%, 85 mA rated, 3.4 Ohm DCR, 1206 SMD. 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":"LQH31","Package":"Tape & Reel (TR)","Ratings":"-","Q @ Freq":"40 @ 2.5MHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"27 µH","Mounting Type":"Surface Mount","Package / Case":"1206 (3216 Metric)","Product Status":"Active","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.126\\\" L x 0.063\\\" W (3.20mm x 1.60mm)","Base Product Number":"LQH31MN","DC Resistance (DCR)":"3.4Ohm","Current Rating (Amps)":"85 mA","Height - Seated (Max)":"0.079\\\" (2.00mm)","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"1206 (3216 Metric)","Frequency - Self Resonant":"13MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 MHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.3128","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/23793266b202ae546e5047be20f0e556.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the inductance tolerance and test frequency for LQH31MN270J03L?","answer":"Inductance is 27 µH ±5%, measured at 1 MHz."},{"question":"What is the self-resonant frequency and what does it mean for circuit design?","answer":"The self-resonant frequency is 13 MHz. Above this frequency the inductor behaves capacitively, so it should not be used as a filter element above roughly 10 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH31MN270J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH31MN270J03L 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}}