{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LPS4018-332MRC","brand":"Coilcraft","brandSlug":"coilcraft","productSlug":"LPS4018-332MRC","canonicalUrl":"https://icboms.com/coilcraft/LPS4018-332MRC","factsUrl":"https://icboms.com/api/mcp/products/LPS4018-332MRC","rawCanonicalId":null},"summary":{"shortDescription":"Coilcraft LPS4018 Series, Drum Core, Shielded, 3.3 µH, ±20%, 1.4 A, 80mOhm, Surface Mount, Nonstandard, AEC-Q200.","salesMarkdown":"## 3.3 µH Shielded Power Inductor for Automotive and Industrial DC-DC The Coilcraft LPS4018-332MRC is a 3.3 µH shielded drum core inductor rated for 1.4 A continuous DC current with a saturation current floor of 1.9 A. The 80 mOhm maximum DCR sets the I²R loss budget for the power stage — at full rated current the self-heating is roughly 157 mW, which the 1.80 mm seated height must dissipate into the board copper. That certification is the gate for any under-hood or cabin-electronics BOM that must survive 125°C ambient. ## Parametric Fit for Buck Regulator Output Filtering The 3.3 µH value at 100 kHz test frequency is a common choice for 1-2 MHz switching regulators stepping 5 V or 12 V rails down to 1.8-3.3 V at 1-2 A loads. The 75 MHz self-resonant frequency sits well above any practical switching frequency, so the inductor behaves as a pure inductance in the regulator's passband. Shielded construction contains the magnetic flux within the ferrite core — adjacent power-stage components or a nearby RF section see minimal stray field coupling. In a dense 4-layer automotive ECU layout, this avoids the cross-regulation and noise injection that unshielded drums cause. The 1.9 A saturation current is the hard limit where inductance drops by 30% — the regulator's peak inductor current during load transients must stay below this value to maintain output ripple control. The 1.4 A continuous rating leaves 36% headroom for transient peaks, which is adequate for most point-of-load converters. ## Active Lifecycle and Sourcing Posture Sourced through independent distribution channels. Current pricing and lead time are confirmed at RFQ against the buyer's BOM quantity. No stock-holding claim is made; availability is verified per inquiry.","metaTitle":"Coilcraft LPS4018-332MRC Shielded Power Inductor, 3.3 µH","metaDescription":"Coilcraft LPS4018-332MRC drum core shielded inductor, 3.3 µH, 1.4 A, AEC-Q200 qualified. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Inductors & Chokes"],"specifications":{"Mfr":"Coilcraft","Type":"Drum Core","Series":"LPS4018","Package":"Strip","Ratings":"AEC-Q200","Features":"-","Q @ Freq":"-","Shielding":"Shielded","Tolerance":"±20%","Inductance":"3.3 µH","Mounting Type":"Surface Mount","Package / Case":"Nonstandard","Product Status":"Active","Material - Core":"Ferrite","lifecycle_stage":"unknown","Size / Dimension":"0.154\\\" L x 0.154\\\" W (3.90mm x 3.90mm)","DC Resistance (DCR)":"80mOhm Max","Current Rating (Amps)":"1.4 A","Height - Seated (Max)":"0.071\\\" (1.80mm)","Operating Temperature":"-40°C~125°C","Supplier Device Package":"-","Frequency - Self Resonant":"75MHz","Current - Saturation (Isat)":"1.9A","Inductance Frequency - Test":"100 kHz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1900","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/0a1383b82e9440ac5710704b6c85e4ee.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is LPS4018-332MRC AEC-Q200 qualified?","answer":"Yes. The AEC-Q200 rating certifies this inductor for automotive-grade stress testing including thermal shock, moisture resistance, and mechanical vibration."},{"question":"What is the saturation current and why does it matter?","answer":"The saturation current (Isat) is 1.9 A. Above this current the ferrite core saturates and inductance drops sharply — the regulator's peak inductor current during load transients must stay below this value to maintain output regulation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/coilcraft/LPS4018-332MRC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/coilcraft/LPS4018-332MRC 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}}