{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LQH43NH122J03L","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"LQH43NH122J03L","canonicalUrl":"https://icboms.com/murata-electronics/LQH43NH122J03L","factsUrl":"https://icboms.com/api/mcp/products/LQH43NH122J03L","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics LQH43 series drum core wirewound inductor, 1.2 mH, 40 mA, ±5%, 24.36 Ohm DCR, unshielded, 1812 SMD, AEC-Q200.","salesMarkdown":"## Inductance, current, and DCR — the three numbers that decide fit The LQH43NH122J03L is a drum-core wirewound inductor from Murata's LQH43 series, packaged in a 1812 (4532 metric) surface-mount footprint. Its 1.2 mH inductance at 1 kHz test frequency and 40 mA current rating set the operating envelope for DC-DC filter or low-current choke applications. The 24.36 Ohm maximum DC resistance (DCR) is the main thermal constraint — at 40 mA the I²R loss is roughly 39 mW, which is manageable in the 1812 body but means this part is not intended for high-efficiency power paths where DCR below 1 Ohm is typical. Rated AEC-Q200, this inductor is qualified for automotive stress tests — thermal shock, moisture resistance, and vibration per the passive-component qualification standard. The ferrite core and unshielded construction mean the inductor radiates a magnetic field — keep sensitive traces or other magnetics at least one body width away in the layout. ## Q factor and self-resonant frequency — signal integrity limits The self-resonant frequency is 1.8 MHz; above that the inductor behaves capacitively. Tolerance is ±5%, tighter than the ±10% or ±20% common for power inductors, which matters for resonant circuits or filter poles where inductance accuracy affects the corner frequency. Supplied in tape-and-reel packaging (cut tape also available), compatible with standard pick-and-place assembly. The base product number LQH43NH covers the full inductance range in this series.","metaTitle":"Murata LQH43NH122J03L Drum Core Inductor, 1.2 mH, 40 mA","metaDescription":"Murata LQH43NH122J03L drum core wirewound inductor, 1.2 mH ±5%, 40 mA, 24.36 Ohm DCR, AEC-Q200, 1812 SMD. Active production, available 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":"AEC-Q200","Features":"-","Q @ Freq":"40 @ 252kHz","Shielding":"Unshielded","Tolerance":"±5%","Inductance":"1.2 mH","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":"LQH43NH","DC Resistance (DCR)":"24.36Ohm Max","Current Rating (Amps)":"40 mA","Height - Seated (Max)":"0.110\\\" (2.80mm)","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"1812","Frequency - Self Resonant":"1.8MHz","Current - Saturation (Isat)":"-","Inductance Frequency - Test":"1 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.6100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/b8fe98626664ecf0068858b1162f6220.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy LQH43NH122J03L and get a price?","answer":"This part is sourced to order against your BOM quantity. Submit an RFQ through the storefront; we confirm availability and pricing from authorized and independent distribution channels at quote time."},{"question":"What is the inductance and current rating of LQH43NH122J03L?","answer":"Inductance is 1.2 mH at 1 kHz test frequency, with a ±5% tolerance. The DC current rating is 40 mA, limited by the 24.36 Ohm maximum DCR."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/LQH43NH122J03L","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/LQH43NH122J03L 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}}