{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BLM15EG121SN1D","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"BLM15EG121SN1D","canonicalUrl":"https://icboms.com/murata-electronics/BLM15EG121SN1D","factsUrl":"https://icboms.com/api/mcp/products/BLM15EG121SN1D","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics EMIFIL® BLM15 series ferrite bead, 0402 (1005 metric), 120 Ohms @ 100 MHz, 1.5 A, 95 mOhm DCR, NRND.","salesMarkdown":"## 120 Ohm ferrite bead in 0402 for supply-line filtering The BLM15EG121SN1D is a single-line ferrite bead from Murata's EMIFIL® BLM15 series, offering 120 Ohms impedance at 100 MHz — the frequency where conducted EMI from switching regulators and digital ICs typically peaks. Rated for 1.5 A continuous current with a maximum DC resistance of 95 mOhm, the voltage drop at full load is under 143 mV — negligible for most logic rails but worth checking if the downstream device has a tight tolerance supply. The 95 mOhm DCR also sets the self-heating: at 1.5 A, dissipation is about 214 mW, well within the 0402 body's capability in still air. ## NRND lifecycle — plan the BOM transition Murata has designated the BLM15EG121SN1D as Not Recommended for New Design (NRND). This means it remains available for existing production but is not intended for new board spins. No pin-compatible alternative is listed by Murata, so a BOM change for new designs will require a parametric search for a 120 Ohm 0402 ferrite bead with at least 1.5 A rating.","metaTitle":"BLM15EG121SN1D Murata Ferrite Bead, 120 Ohms @ 100 MHz","metaDescription":"Murata BLM15EG121SN1D ferrite bead, 120 Ohms @ 100 MHz, 1.5 A, 95 mOhm DCR, 0402, NRND. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["EMI Filters & Ferrite Beads"],"specifications":{"Mfr":"Murata Electronics","Series":"EMIFIL®, BLM15","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Filter Type":"-","Height (Max)":"0.022\\\" (0.55mm)","Mounting Type":"Surface Mount","Package / Case":"0402 (1005 Metric)","Product Status":"Not For New Designs","Number of Lines":"1","lifecycle_stage":"unknown","Size / Dimension":"0.039\\\" L x 0.022\\\" W (1.00mm x 0.55mm)","Base Product Number":"BLM15EG","Current Rating (Max)":"1.5A","Impedance @ Frequency":"120 Ohms @ 100 MHz","Operating Temperature":"-55°C ~ 125°C","DC Resistance (DCR) (Max)":"95mOhm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1700","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the impedance and current rating of BLM15EG121SN1D?","answer":"The BLM15EG121SN1D provides 120 Ohms impedance at 100 MHz and is rated for 1.5 A continuous current with a maximum DC resistance of 95 mOhm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/BLM15EG121SN1D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/BLM15EG121SN1D 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}}