{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TAJT686M004RNJ","brand":"KYOCERA AVX","brandSlug":"kyocera-avx","productSlug":"TAJT686M004RNJ","canonicalUrl":"https://icboms.com/kyocera-avx/TAJT686M004RNJ","factsUrl":"https://icboms.com/api/mcp/products/TAJT686M004RNJ","rawCanonicalId":null},"summary":{"shortDescription":"Molded tantalum capacitor, KYOCERA AVX TAJ series, 68 µF, 4 V, ±20% tolerance, 1.5 Ohm ESR, -55°C to 125°C, size code T (1210), surface mount, tape and reel packaging.","salesMarkdown":"The 1.5 Ohm ESR is the series resistance that limits ripple current and self-heating. For a 100 kHz buck converter output, the ripple voltage across this capacitor is ESR × ripple current — keep the ripple current below 300 mA RMS to stay within the 55°C temperature rise limit typical for a 1210 tantalum at 125°C ambient. At the high end, the leakage current doubles every 10°C above 25°C — budget for increased DC leakage in a 105°C engine-bay application. ## 1210 footprint — board layout notes The size code T (3.50 mm × 2.80 mm × 1.20 mm) matches the standard 1210 (3528 metric) land pattern. The low 1.20 mm seated height suits tight card-edge or mezzanine assemblies where vertical clearance is under 1.5 mm. The TAJ series is a broad, mature product line from KYOCERA AVX, so supply continuity is stable for existing designs and new builds alike. ## General-purpose tantalum — where it fits Marked as General Purpose, this part is suitable for bulk decoupling, bypass, and filtering in power supplies, DC-DC converters, and signal conditioning circuits. It is not a low-ESR or polymer type — do not use it in high-ripple or low-impedance applications where a 1.5 Ohm ESR would dominate the loss budget.","metaTitle":"TAJT686M004RNJ 68 µF 4 V Molded Tantalum Capacitor","metaDescription":"68 µF, 4 V, ±20%, 1.5 Ohm ESR, -55°C to 125°C, 1210 case. Active production. Sourced per RFQ. TAJT686M004RNJ datasheet and specs.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Specialty Capacitors"],"specifications":{"Mfr":"KYOCERA AVX","Type":"Molded","Series":"TAJ","Package":"Tape & Reel (TR)","Features":"General Purpose","Tolerance":"±20%","Capacitance":"68 µF","Failure Rate":"-","Lead Spacing":"-","Mounting Type":"Surface Mount","Package / Case":"1411 (3528 Metric), 1210","Product Status":"Active","Voltage - Rated":"4 V","lifecycle_stage":"unknown","Lifetime @ Temp.":"-","Size / Dimension":"0.138\\\" L x 0.110\\\" W (3.50mm x 2.80mm)","Height - Seated (Max)":"0.047\\\" (1.20mm)","Operating Temperature":"-55°C ~ 125°C","Manufacturer Size Code":"T","ESR (Equivalent Series Resistance)":"1.5Ohm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.4528","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/ce09bb895bbc5407352e9a690f57411c.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/kyocera-avx/TAJT686M004RNJ","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/kyocera-avx/TAJT686M004RNJ 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}}