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Contents

Pinout
Key specifications
Electrical characteristics
Materials and finish
CAD (KiCad official)
Provenance

README

markdown

T491A155K025AT

KEMET · Tantalum Capacitors · 1206

T491A155K025AT from KEMET, in a 1206. 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	1	passive	Terminal 1 of an unpolarised capacitor; either orientation.
2	2	passive	Terminal 2 of an unpolarised capacitor; either orientation.

Key specifications

Parameter	Value
Manufacturer	KEMET
Package	1206
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
DC leakage current				0.5	µA	at +25°C, maximum/5 minutes (Table 1, 25 VDC, 1.5 µF, case A)	11
Dissipation factor	DF			6	%	at +25°C, 120 Hz, maximum (Table 1, 25 VDC, 1.5 µF, case A)	11
Equivalent series resistance	ESR			7	Ω	at +25°C, 100 kHz, maximum (Table 1, 25 VDC, 1.5 µF, case A)	11
Maximum allowable ripple current				104	mA	100 kHz, +25°C (Table 1, 25 VDC, 1.5 µF, case A)	11
Maximum allowable ripple current				94	mA	100 kHz, +85°C (Table 1, 25 VDC, 1.5 µF, case A)	11
Maximum allowable ripple current				42	mA	100 kHz, +125°C (Table 1, 25 VDC, 1.5 µF, case A)	11
Capacitance change with temperature	ΔC/C	-10		10	%	at −55°C, relative to initial limit at +25°C	3
Capacitance change with temperature	ΔC/C	-20		20	%	at +125°C, relative to initial limit at +25°C	3
Dissipation factor multiplier at temperature	DF			1.5	x IL	at +85°C, IL = initial limit	3
DC leakage multiplier at temperature	DCL			10	x IL	at +85°C, IL = initial limit	3
DC leakage multiplier at temperature	DCL			12	x IL	at +125°C, IL = initial limit	3
Operating temperature range		-55		125	°C		2
Recommended maximum application voltage				50	% of VR	−55°C to 85°C	14
Recommended maximum application voltage				33	% of VR	85°C to 125°C	14
Maximum power dissipation (case A)	P max			75	mW	at 25°C w/+20°C rise, case A (3216-18)	14
Rated voltage				25	VDC	DC rated voltage at 85°C	11
Rated capacitance			1.5		µF	at 120 Hz/25°C	2
Capacitance tolerance		-10		10	%	K tolerance (±10%), per part number suffix K	2

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		gold	solder systems. Tin/lead (Sn/Pb) terminations are available upon request for any part number. Gold-plated terminations	1

CAD (KiCad official)

Symbol: T491A155K025AT
Footprint: Capacitor_SMD:C_1206_3216Metric
3D model: 1206 (KiCad packages3D, STEP)
3D model files: t491a155k025at-etched.step / t491a155k025at-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); t491a155k025at.step / t491a155k025at.glb are the bare package body.

Provenance

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

Datasheet: KEMET datasheet (23 pp, sha256 3a4dcd833b469a95, retrieved 2026-10-21, 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