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KYOCERA AVX TAJR156K004RNJ — Specialty Capacitors

TAJR156K004RNJ KYOCERA AVX Molded Tantalum Capacitor 15 µF

MPNTAJR156K004RNJ
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KYOCERA AVX TAJ series, Molded tantalum capacitor, 15 µF ±10%, 4 V rated, 0805 (2012 Metric) case, 4 Ohm ESR, -55°C to 125°C operating range

$0.9400Ref. price · indicative, final on quote
KYOCERA AVX TAJR156K004RNJ datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TAJR156K004RNJ specifications
ParameterValue
TypeMolded
SeriesTAJ
MountingSurface Mount
ESR4Ohm
Voltage - rated4 V
Operating temperature-55°C ~ 125°C
Size (Dimension)0.081\" L x 0.051\" W (2.05mm x 1.30mm)
Height - seated0.047\" (1.20mm)
PackageTape & Reel (TR) Cut Tape (CT)
FeaturesGeneral Purpose
Tolerance±10%
Capacitance15 µF
Case0805 (2012 Metric)
Manufacturer size codeR

Product details

15 µF, 4 V, 4 Ohm ESR — decoupling and filtering fit

The 4 Ohm ESR at 100 kHz sets the ripple current handling and power dissipation ceiling — for a 100 kHz switching regulator output, the ripple voltage across the cap is ESR × ripple current, so a 50 mA ripple yields 200 mV pk-pk. This ESR is typical for the 0805 case size at this capacitance; if the downstream rail needs lower ripple, a larger case or a polymer tantalum is the next step.

The capacitor can sit on an avionics power rail that sees -40°C cold soak and +105°C under full load, with margin at both ends.

Frequently asked questions

Is there a pin-compatible equivalent to TAJR156K004RNJ in the TAJ series?

The TAJ series includes many 0805-case tantalum capacitors, but a direct equivalent must match the 15 µF capacitance, 4 V rating, ±10% tolerance, and 4 Ohm ESR. No single official cross-reference is listed; a parametric search on 0805 case, 15 µF, 4 V, and ±10% tolerance will yield candidates from the same series or from competitors like Kemet or Vishay.