{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LPS4018-684MRC","brand":"Coilcraft","brandSlug":"coilcraft","productSlug":"LPS4018-684MRC","canonicalUrl":"https://icboms.com/coilcraft/LPS4018-684MRC","factsUrl":"https://icboms.com/api/mcp/products/LPS4018-684MRC","rawCanonicalId":null},"summary":{"shortDescription":"Coilcraft LPS4018 series shielded drum core inductor, LPS4018-684MRC, 680 µH ±20%, 120 mA, 11.5 Ohm DCR, AEC-Q200, surface mount, nonstandard package.","salesMarkdown":"## What the 680 µH rating means for your power rail The Coilcraft LPS4018-684MRC is a shielded drum-core inductor from the LPS4018 series, rated 680 µH ±20% at 100 kHz test frequency. The 120 mA current rating matches the saturation current (Isat) — this is a design where the core saturates at the same current the winding can carry, so the inductor's usable range is the full 120 mA without a separate derating step for saturation. ## Shielding and DCR — the trade-off in a 3.9 mm footprint The ferrite core is fully shielded, which keeps the magnetic field contained — critical when the inductor sits next to a sensitive ADC, a CAN transceiver, or a clock oscillator on a dense automotive PCB. The 11.5 Ohm max DCR is the penalty for 680 µH in a 3.9 x 3.9 mm package: at 120 mA, the copper loss is about 165 mW, which the 1.8 mm seated height dissipates into the board plane without a hot spot. Self-resonant frequency is 3.5 MHz — above that, the inductor behaves capacitively. For a switching regulator switching at 500 kHz to 2 MHz, the SRF provides enough headroom that the impedance stays inductive across the loop bandwidth. The nonstandard package means the footprint is specific to this series — no direct drop-in from a different manufacturer without a layout change.","metaTitle":"Coilcraft LPS4018-684MRC Shielded Drum Core, 680 µH, 120 mA","metaDescription":"Coilcraft LPS4018-684MRC shielded drum core inductor, 680 µH ±20%, 120 mA, DCR 11.5 Ohm max, AEC-Q200, -40 to +125 °C. Sourced to order.","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":"680 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)":"11.5Ohm Max","Current Rating (Amps)":"120 mA","Height - Seated (Max)":"0.071\\\" (1.80mm)","Operating Temperature":"-40°C~125°C","Supplier Device Package":"-","Frequency - Self Resonant":"3.5MHz","Current - Saturation (Isat)":"120mA","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":"How can I order the LPS4018-684MRC or check availability?","answer":"The LPS4018-684MRC is an active Coilcraft part. Submit an RFQ for a firm lead time."},{"question":"Is the LPS4018-684MRC AEC-Q200 qualified?","answer":"Yes, the LPS4018-684MRC carries an AEC-Q200 rating, meaning it passed automotive-grade reliability testing including thermal shock, moisture resistance, and solder heat. The operating temperature range is -40 to +125 °C."},{"question":"What is the saturation current for this inductor?","answer":"The saturation current (Isat) is 120 mA, which matches the continuous current rating. The core saturates at the same current the winding can carry, so the usable range is the full 120 mA without separate derating for saturation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/coilcraft/LPS4018-684MRC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/coilcraft/LPS4018-684MRC 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}}