component

T491B475K010AT

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KEMET Tantalum Capacitors, CASE-B-3528-21(mm). Polarised capacitor: pin 1 is + by the KiCad polarised-footprint convention, KiCad symbol/footprint/3D.

componentcapacitorst491b475k010atfactory-2.0.0extractor-text

Verified T491B475K010AT

by Ray · last 12 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

12 Nov 2026RaySupersedes the earlier record: that check missed polarity (the pins said "unpolarised"; this capacitor is polarised): component-page-verify now PASSESfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: T491B475K010AT · CASE-B-3528-21(mm) · 2 pins
  • ✓copper: 2 copper pads, none touching another net
  • ✓datasheet: two-terminal part whose datasheet prints no pin numbers: pins 1 and 2 by library convention, no names to check
  • ✓distributor: lcsc C600512, digikey 399-3721-2-ND, mouser 80-T491B475K010
  • ✓family: CP_EIA-3528-21_Kemet-B
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-9vrgvt_i/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 2 pins = 2 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 2 pins agree
  • ✓symbol_text: no pin names collide
  • ✓viewers: viewers/footprint.html 20 kB, viewers/symbol.html 6 kB
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ t491b475k010at.kicad_sym✓ t491b475k010at.kicad_mod✓ t491b475k010at.step
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Made with kicad-footprint-generator 10.0 · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray
viewers t491b475k010at: viewers · Ray
package.json Polarity: pin 1 = +, 2 = - (symbol, footprint and 3D agree); brief and README corrected · Ray
page.json brief: polarity sentence corrected · Ray
README.md Polarity: pin 1 = +, 2 = - (symbol, footprint and 3D agree); brief and README corrected · Ray
t491b475k010at-etched.glb Publish 0.1.0 · Ray
t491b475k010at-etched.step t491b475k010at: factory component page (tier=lcsc) · Ray
t491b475k010at-hero.glb t491b475k010at: hero GLB from the etched model (keeps the MPN mark) · Ray
t491b475k010at-hero.overlay.json Publish 0.1.0 · Ray
t491b475k010at.glb Publish 0.1.0 · Ray
t491b475k010at.kicad_mod Publish 0.1.0 · Ray
t491b475k010at.kicad_sym t491b475k010at: KiCad Device:C_Polarized symbol instead of a box (two-terminal passive) · Ray
t491b475k010at.lbr t491b475k010at: KiCad Device:C_Polarized symbol instead of a box (two-terminal passive) · Ray
t491b475k010at.step Publish 0.1.0 · Ray
verification.json Verified: Supersedes the earlier record: that check missed polarity (the pins said "unpolarised"; this capacitor is pol… · Ray

T491B475K010AT

KEMET · Tantalum Capacitors · CASE-B-3528-21(mm)

T491B475K010AT from KEMET, in a CASE-B-3528-21(mm). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 + passive Positive terminal (pad 1 of the CP_ footprint; symbol and 3D mark the + end).
2 - passive Negative terminal.

Key specifications

Parameter Value
Manufacturer KEMET
Package CASE-B-3528-21(mm)
Category Capacitors
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Nominal capacitance (rated cap, 4.7 µF for code 475) C 4.7 µF Rated capacitance at 120 Hz/25°C, case B/3528-21, 10 VDC 7
Capacitance tolerance (K = ±10%) ΔC/C -10 10 % K tolerance per part-number code K in T491B475K010AT 2
Rated DC voltage VR 10 V Rated voltage at 85°C (code 010 = 10 VDC) 7
Maximum power dissipation (case B) Pmax 85 mW At 25°C with +20°C rise; must be reduced with increasing ambient temperature 14
Capacitance change vs temperature (−55°C) ΔC/C -10 10 % Relative to +25°C initial limit (IL); temperature stability step test 3
Capacitance change vs temperature (+85°C) ΔC/C -10 10 % Relative to +25°C initial limit (IL); temperature stability step test 3
Capacitance change vs temperature (+125°C) ΔC/C -20 20 % Relative to +25°C initial limit (IL); temperature stability step test 3
Dissipation factor vs temperature (+85°C) DF 1.5 x IL Multiple of initial limit at +85°C; temperature stability step test 3
Dissipation factor vs temperature (+125°C) DF 1.5 x IL Multiple of initial limit at +125°C; temperature stability step test 3
DC leakage vs temperature (+85°C) DCL 10 x IL Multiple of initial limit at +85°C; temperature stability step test 3
DC leakage vs temperature (+125°C) DCL 12 x IL Multiple of initial limit at +125°C; temperature stability step test 3
DC leakage current DCL 0.5 µA At +20°C, rated voltage, maximum after 5 minutes (table row for 4.7 µF/10 V B case) 7
Dissipation factor DF 6 % At +20°C, 120 Hz, maximum (table row for 4.7 µF/10 V B case) 7
Equivalent series resistance ESR 3.5 Ω At +20°C, 100 kHz, maximum (table row for 4.7 µF/10 V B case) 7
Maximum allowable ripple current (rms) Irms 156 mA 100 kHz, at +25°C ambient (table row for 4.7 µF/10 V B case) 7
Maximum allowable ripple current (rms) Irms 140 mA 100 kHz, at +85°C ambient (table row for 4.7 µF/10 V B case) 7
Maximum allowable ripple current (rms) Irms 62 mA 100 kHz, at +125°C ambient (table row for 4.7 µF/10 V B case) 7
Operating temperature range TA -55 125 °C Operating temperature range for the T491 series; maximum operating temp 125°C in table row 2
Recommended maximum application voltage VApp 50 % of VR Ambient −55°C to 85°C 14
Recommended maximum application voltage VApp 33 % of VR Ambient 85°C to 125°C 14
Reflow temperature TReflow 260 °C Maximum reflow temperature shown in ratings table header (≤ 260 °C) 5

CAD (KiCad official)

  • Symbol: T491B475K010AT
  • Footprint: Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B
  • 3D model: CASE-B-3528-21(mm) (KiCad packages3D, STEP)
  • 3D model files: t491b475k010at-etched.step / t491b475k010at-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); t491b475k010at.step / t491b475k010at.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: KEMET datasheet (23 pp, sha256 271b6cea80c8b55f, retrieved 2026-10-13, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins, primary two-terminal convention (convention), consensus off (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF