TAJS225K010RNJ Equivalent & Substitute Parts

Part Overview

The TAJS225K010RNJ is a 2.2 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 10 V operation in a 1206 (3216 Metric) surface mount package. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package footprint and rated voltage, allowing for direct board-level replacement in applications where the primary part becomes unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value	Unit
Capacitance	2.2	µF
Tolerance	±10%	-
Voltage - Rated	10	V
Type	Molded	-
Package / Case	1206 (3216 Metric)	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-55°C to 125°C	-
Size / Dimension	0.126" L x 0.063" W (3.20mm x 1.60mm)	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution eligibility for the TAJS225K010RNJ is determined by strict adherence to the following parameters:

Capacitance Value: Must be 2.2 µF
Tolerance: Must be ±10%
Rated Voltage: Must be 10 V
Package / Case: Must be 1206 (3216 Metric)
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must support -55°C to 125°C
Type: Must be Molded Tantalum

All identified substitute parts meet these electrical and mechanical requirements. Variations in ESR (Equivalent Series Resistance), manufacturer, series designation, and packaging format (Tape & Reel vs. Cut Tape) do not affect functional substitutability at the board level, provided the core parameters remain constant.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Package	ESR (Ohm)	Height - Seated (Max)	RoHS Status	Inventory (Pcs)
TAJS225K010RNJ	KYOCERA AVX	2.2 µF	±10%	10 V	1206 (3216 Metric)	12	0.047" (1.20mm)	ROHS3 Compliant	826
TAJA225K010RNJ	KYOCERA AVX	2.2 µF	±10%	10 V	1206 (3216 Metric)	-	0.071" (1.80mm)	ROHS3 Compliant	3700
TPSA225K010R1800	KYOCERA AVX	2.2 µF	±10%	10 V	1206 (3216 Metric)	1.8	0.071" (1.80mm)	ROHS3 Compliant	2639
293D225X9010A2TE3	Vishay Sprague	2.2 µF	±10%	10 V	1206 (3216 Metric)	6.3	0.071" (1.80mm)	ROHS3 Compliant	2200
T491A225K010AH	KEMET	2.2 µF	±10%	10 V	1206 (3216 Metric)	8	0.071" (1.80mm)	RoHS non-compliant	2727
T491A225K010AT	KEMET	2.2 µF	±10%	10 V	1206 (3216 Metric)	8	0.071" (1.80mm)	ROHS3 Compliant	1997
T494A225K010AT	KEMET	2.2 µF	±10%	10 V	1206 (3216 Metric)	6	0.071" (1.80mm)	ROHS3 Compliant	6328

Engineering Selection Recommendations

ROHS3 Compliant Substitutes (Preferred for New Designs)

TAJA225K010RNJ, TPSA225K010R1800, 293D225X9010A2TE3, T491A225K010AT, and T494A225K010AT all maintain ROHS3 compliance and are suitable for applications requiring regulatory adherence. These parts are functionally equivalent to the TAJS225K010RNJ at the board level.

Non-Compliant Alternative

T491A225K010AH is classified as RoHS non-compliant and should be selected only when legacy system requirements or specific design constraints mandate its use.

Packaging Considerations

TAJA225K010RNJ and T491A225K010AT are supplied in Cut Tape (CT) & Digi-Reel® format, while TAJS225K010RNJ, TPSA225K010R1800, 293D225X9010A2TE3, T491A225K010AH, and T494A225K010AT are supplied in Tape & Reel (TR) format. Packaging selection depends on assembly process requirements and volume considerations.

Frequently Asked Questions (FAQ)

Q: Can TAJA225K010RNJ replace TAJS225K010RNJ directly on the PCB?

A: Yes. Both parts share identical electrical specifications (2.2 µF, ±10%, 10 V) and package footprint (1206). The primary difference is seated height: TAJA225K010RNJ measures 0.071" (1.80mm) versus TAJS225K010RNJ at 0.047" (1.20mm). This height difference does not affect electrical function or board-level compatibility in standard applications.

Q: What is the significance of ESR variation among substitute parts?

A: ESR values range from 1.8 Ohm (TPSA225K010R1800) to 12 Ohm (TAJS225K010RNJ). ESR affects ripple current handling and thermal performance but does not alter the fundamental capacitance or voltage rating. Selection should consider application-specific ripple current requirements.

Q: Are KEMET T491 series parts compatible with KYOCERA AVX TAJ series?

A: Yes. T491A225K010AT and T491A225K010AH maintain identical electrical specifications and package dimensions. The primary distinction is RoHS compliance status: T491A225K010AT is ROHS3 compliant, while T491A225K010AH is non-compliant.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) & Digi-Reel® format is suitable for lower-volume or manual assembly processes. Tape & Reel (TR) format is optimized for high-speed automated pick-and-place assembly. Both formats contain identical components; packaging selection depends on manufacturing process requirements.

Q: Can T494A225K010AT be used in place of T491A225K010AT?

A: Yes. Both are KEMET molded tantalum capacitors with 2.2 µF capacitance, ±10% tolerance, and 10 V rating in 1206 package. The T494 series features 6 Ohm ESR compared to 8 Ohm in the T491 series, representing a performance improvement in ripple current handling.

Q: Is Vishay Sprague 293D225X9010A2TE3 electrically equivalent?

A: Yes. The 293D225X9010A2TE3 meets all electrical and mechanical requirements: 2.2 µF, ±10%, 10 V, 1206 package, ROHS3 compliant. ESR is specified at 6.3 Ohm, placing it between KYOCERA AVX and KEMET offerings.

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