{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ACM2012E-391-2P-T00","brand":"TDK Corporation","brandSlug":"tdk-corporation","productSlug":"ACM2012E-391-2P-T00","canonicalUrl":"https://icboms.com/tdk-corporation/ACM2012E-391-2P-T00","factsUrl":"https://icboms.com/api/mcp/products/ACM2012E-391-2P-T00","rawCanonicalId":null},"summary":{"shortDescription":"TDK Corporation ACM-E series signal line common mode filter, ACM2012E-391-2P-T00, 390 Ohms @ 100 MHz, 300 mA, 50 V DC, 2-line, horizontal 4-pad SMD, 2.00 mm x 1.20 mm.","salesMarkdown":"## What the 390 Ohm impedance means for signal-line filtering The ACM2012E-391-2P-T00: This is a 2-line common-mode filter from the ACM-E series, rated 390 Ohms at 100 MHz. The impedance peak at that frequency tells you where it suppresses common-mode noise — it is sized for conducted EMI on data or signal lines switching in the 100 MHz band. The 300 mA continuous current rating and 800 mOhm max DCR mean the series resistance is low enough that a 300 mA signal sees under 0.24 V drop; above that current the I²R heating starts to matter inside the 0805 footprint. ## Footprint and temperature grade for the rework bench It comes in a horizontal 4-pad configuration, so the two differential pairs route in and out on the same side. The operating range is -40°C to 85°C, which covers most indoor industrial and telecom environments but not extended automotive under-hood duty.","metaTitle":"TDK ACM2012E-391-2P-T00 Common Mode Filter, 390 Ohms, 300mA","metaDescription":"TDK ACM2012E-391-2P-T00 common mode filter, 390 Ohms @ 100 MHz, 300mA, 50V DC. Obsolete — sourced to order against RFQ through surplus channels.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["EMI Filters & Ferrite Beads"],"specifications":{"Mfr":"TDK Corporation","Series":"ACM-E","Package":"Tape & Reel (TR); Cut Tape (CT)","Ratings":"-","Features":"-","Filter Type":"Signal Line","Height (Max)":"0.043\\\" (1.10mm)","Mounting Type":"Surface Mount","Package / Case":"Horizontal, 4 PC Pad","Product Status":"Obsolete","Approval Agency":"-","Number of Lines":"2","lifecycle_stage":"unknown","Size / Dimension":"0.079\\\" L x 0.047\\\" W (2.00mm x 1.20mm)","Voltage Rating - AC":"-","Voltage Rating - DC":"50V","Current Rating (Max)":"300mA","Impedance @ Frequency":"390 Ohms @ 100 MHz","Operating Temperature":"-40°C~85°C","DC Resistance (DCR) (Max)":"800mOhm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.5300","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6c42ca31ccd317175ee09520b5e01a10.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ACM2012E-391-2P-T00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy ACM2012E-391-2P-T00 or check stock?","answer":"This obsolete part is sourced to order against your BOM through independent surplus channels."},{"question":"What are the key electrical ratings for ACM2012E-391-2P-T00?","answer":"Common-mode impedance is 390 Ohms at 100 MHz. Maximum DC current is 300 mA, maximum DC resistance is 800 mOhm, and the voltage rating is 50 V DC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/tdk-corporation/ACM2012E-391-2P-T00","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/tdk-corporation/ACM2012E-391-2P-T00 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}}