{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"BLM15BD121SN1D","brand":"Murata Electronics","brandSlug":"murata-electronics","productSlug":"BLM15BD121SN1D","canonicalUrl":"https://icboms.com/murata-electronics/BLM15BD121SN1D","factsUrl":"https://icboms.com/api/mcp/products/BLM15BD121SN1D","rawCanonicalId":null},"summary":{"shortDescription":"Murata Electronics EMIFIL® BLM15 series ferrite bead, BLM15BD121SN1D, 0402 (1005 Metric), 120 Ohms @ 100 MHz, 300 mA, Signal Line.","salesMarkdown":"## What the 120-ohm impedance at 100 MHz means on a signal line The BLM15BD121SN1D: This is a single-line ferrite bead from Murata's EMIFIL® BLM15 series, housed in a standard 0402 (1005 Metric) surface-mount package. Its primary job is to suppress conducted noise on a DC or low-frequency signal trace by presenting a resistive impedance of 120 Ohms at 100 MHz, the typical switching noise band for many DC-DC converters and digital clocks. The 300 mA maximum current rating is the DC bias limit before the ferrite material saturates and the impedance drops. Below that current the bead maintains its rated loss; design the trace budget so the steady-state current plus ripple stays under 300 mA, or the filter effect degrades. ## Production status and procurement posture It is a standard catalog ferrite bead in the BLM15 series, sourced through independent distribution channels.","metaTitle":"Murata BLM15BD121SN1D Ferrite Bead, 120 Ohms @ 100 MHz","metaDescription":"Murata BLM15BD121SN1D EMIFIL ferrite bead, 120 Ohms @ 100 MHz, 300 mA, 0402 package. Active production. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["EMI Filters & Ferrite Beads"],"specifications":{"Mfr":"Murata Electronics","Series":"EMIFIL®, BLM15","Package":"Tape & Reel (TR) Cut Tape (CT)","Ratings":"-","Filter Type":"Signal Line","Height (Max)":"0.022\\\" (0.55mm)","Mounting Type":"Surface Mount","Package / Case":"0402 (1005 Metric)","Product Status":"Active","Number of Lines":"1","lifecycle_stage":"unknown","Size / Dimension":"0.039\\\" L x 0.022\\\" W (1.00mm x 0.55mm)","Base Product Number":"BLM15BD","Current Rating (Max)":"300mA","Impedance @ Frequency":"120 Ohms @ 100 MHz","Operating Temperature":"-55°C ~ 125°C","DC Resistance (DCR) (Max)":"300mOhm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.1000","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/73c2e560dc04bcd20af9d3bc02fbbc8b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to BLM15BD121SN1D in the EMIFIL BLM15 family?","answer":"The BLM15 series includes many impedance values in the same 0402 footprint. A direct sibling with the same package and current rating but a different impedance target is the BLM15BD102SN1D (1000 Ohms @ 100 MHz). The deciding factor between the two is the noise frequency you need to suppress — 120 Ohms is suited for lower-frequency switching noise around 100 MHz, while 1000 Ohms targets higher attenuation at a similar frequency but with a steeper roll-off below 10 MHz."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/murata-electronics/BLM15BD121SN1D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/murata-electronics/BLM15BD121SN1D 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}}