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KYOCERA AVX TAJW227M004RNJ — Specialty Capacitors

TAJW227M004RNJ — KYOCERA AVX 220 µF 4 V Molded Tantalum

MPNTAJW227M004RNJ
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KYOCERA AVX TAJ series, molded tantalum capacitor, 220 µF ±20%, 4 V rated, 1.2 Ohm ESR, -55°C to 125°C, 2312 (6032 Metric) surface-mount case, size code W.

$0.6631Ref. price · indicative, final on quote
KYOCERA AVX TAJW227M004RNJ datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TAJW227M004RNJ specifications
ParameterValue
TypeMolded
SeriesTAJ
MountingSurface Mount
ESR1.2Ohm
Voltage - rated4 V
Operating temperature-55°C ~ 125°C
Size (Dimension)0.236\" L x 0.126\" W (6.00mm x 3.20mm)
Height - seated0.059\" (1.50mm)
PackageTape & Reel (TR)
FeaturesGeneral Purpose
Tolerance±20%
Capacitance220 µF
Case2312 (6032 Metric)
Manufacturer size codeW

Product details

220 µF bulk cap with a wide temperature ceiling

The TAJW227M004RNJ: This is a 220 µF molded tantalum capacitor rated at 4 V with a 1.2 Ohm ESR — a general-purpose bulk-decoupling or hold-up cap for moderate-ripple rails. The 2312 (6032 Metric) case measures 6.00 mm x 3.20 mm with a seated height of just 1.50 mm — low enough to fit under a board shield or on a tight mezzanine stack.

At 1.2 Ohm ESR, this cap is not a low-ESR type — it is a mid-range general-purpose part. For a 100 kHz ripple current of, say, 500 mA, the self-heating from ESR dissipation is roughly 0.3 W, which is manageable in the 2312 case as long as the ambient stays within the -55°C to 125°C window. If your rail has high-frequency switching ripple above 1 A RMS, step up to a low-ESR (0.1–0.3 Ohm) polymer or multi-anode tantalum.

Frequently asked questions

What is the ESR of TAJW227M004RNJ?

The listed ESR is 1.2 Ohm. This is a mid-range value for a 220 µF 4 V molded tantalum — suitable for bulk filtering and hold-up, not for high-frequency decoupling where sub-0.5 Ohm ESR is preferred.

Is TAJW227M004RNJ RoHS compliant?

The part is listed as a General Purpose molded tantalum from the TAJ series. KYOCERA AVX TAJ series parts are typically RoHS compliant, but confirm the specific date-code compliance certificate with your distributor at RFQ.

How does TAJW227M004RNJ compare to other 220 µF 4 V tantalum capacitors?

Many 220 µF 4 V tantalums in the same case size carry a 1.0–2.0 Ohm ESR and a -55°C to 85°C or 105°C rating. The TAJW227M004RNJ's 125°C ceiling is wider than most general-purpose parts, making it a better fit for high-temperature environments. The ESR at 1.2 Ohm is typical — not low-ESR, not high-ESR.