TAJS475K010RNJ Equivalent & Substitute Parts

Part Overview

The TAJS475K010RNJ is a 4.7 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 10 V with ±10% tolerance 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 (capacitance, voltage rating, tolerance, and operating temperature range) are maintained across alternative manufacturers or series variants, with consideration for ESR (Equivalent Series Resistance) performance characteristics and package dimensions.

Key Parameters

Parameter	Value
Capacitance	4.7 µF
Voltage Rating	10 V
Tolerance	±10%
Type	Molded Tantalum
Package / Case	1206 (3216 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
ESR (Equivalent Series Resistance)	5 Ohm (main part)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TAJS475K010RNJ is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 4.7 µF (exact match required)
Voltage Rating: 10 V (exact match required)
Tolerance: ±10% (exact match required)
Package / Case: 1206 (3216 Metric) (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)
Mounting Type: Surface Mount (exact match required)
Type: Molded Tantalum (exact match required)

Secondary Consideration:

ESR (Equivalent Series Resistance): Varies across substitute parts (1 Ohm to 5 Ohm). Lower ESR values indicate improved performance characteristics but do not disqualify substitution when primary criteria are met.

All identified substitute parts maintain identical electrical specifications and package dimensions. Variations in ESR, manufacturer series designation, and packaging format (Tape & Reel vs. Cut Tape) do not affect functional equivalence for standard circuit applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	ESR (Ohm)	Package	Height (Max)	RoHS Status
TAJS475K010RNJ	KYOCERA AVX	TAJ	4.7 µF	10 V	±10%	5	1206 (3216 Metric)	0.047" (1.20mm)	ROHS3
TAJA475K010RNJ	KYOCERA AVX	TAJ	4.7 µF	10 V	±10%	5	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
TPSA475K010R1400	KYOCERA AVX	TPS	4.7 µF	10 V	±10%	1.4	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
293D475X9010A2TE3	Vishay Sprague	293D	4.7 µF	10 V	±10%	5	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
593D475X9010A2TE3	Vishay Sprague	593D	4.7 µF	10 V	±10%	3	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
T491A475K010AT	KEMET	T491	4.7 µF	10 V	±10%	5	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
T494A475K010AT	KEMET	T494	4.7 µF	10 V	±10%	3	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
T495A475K010ATE1K3	KEMET	T495	4.7 µF	10 V	±10%	1.3	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
TR3A475K010C1000	Vishay Sprague	TR3	4.7 µF	10 V	±10%	1	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
TR3A475K010C1400	Vishay Sprague	TR3	4.7 µF	10 V	±10%	1.4	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3
TR3A475K010C1500	Vishay Sprague	TR3	4.7 µF	10 V	±10%	1.5	1206 (3216 Metric)	0.071" (1.80mm)	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements for current applications. Selection between equivalent parts should be based on:

Availability and Lead Time: Inventory levels vary across manufacturers and series. TPSA475K010R1400 (57,672 units) and T495A475K010ATE1K3 (6,700 units) offer higher stock availability compared to the main part TAJS475K010RNJ (705 units).

ESR Performance Characteristics: Parts with lower ESR values (TR3A475K010C1000 at 1 Ohm, T495A475K010ATE1K3 at 1.3 Ohm, TPSA475K010R1400 at 1.4 Ohm) provide reduced impedance characteristics. Parts with higher ESR (TAJS475K010RNJ, TAJA475K010RNJ, 293D475X9010A2TE3, T491A475K010AT at 5 Ohm) maintain equivalent functional performance for general-purpose applications.

Package Height Consideration: The main part TAJS475K010RNJ has a seated height of 0.047" (1.20mm), while all substitute parts measure 0.071" (1.80mm). This dimensional difference must be evaluated for PCB layout constraints and clearance requirements.

Manufacturer Certification: KEMET T-series parts include specified lifetime ratings (2000 Hrs @ 125°C for T491A475K010AT and T494A475K010AT; 2000 Hrs @ 85°C for T495A475K010ATE1K3), providing documented reliability data for mission-critical applications.

Frequently Asked Questions (FAQ)

Q: Can I substitute TAJS475K010RNJ with any of the listed parts without circuit modification?

A: Yes. All substitute parts maintain identical electrical specifications (4.7 µF, 10 V, ±10% tolerance) and operate across the same temperature range (-55°C ~ 125°C). Functional equivalence is guaranteed for standard circuit applications. However, the increased package height (0.071" vs. 0.047") must be verified against PCB layout constraints.

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

A: ESR (Equivalent Series Resistance) affects impedance characteristics and thermal performance under AC ripple current conditions. Lower ESR values (1 to 1.5 Ohm) provide superior performance in high-frequency or high-ripple-current applications. Higher ESR values (5 Ohm) are suitable for general-purpose DC filtering. Selection depends on circuit requirements, not substitution eligibility.

Q: Are there packaging format differences between substitute parts?

A: Yes. The main part TAJS475K010RNJ is supplied in Tape & Reel (TR) format. Substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. Packaging format does not affect electrical performance or component compatibility; selection is based on procurement and assembly requirements.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All listed parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS code (8532.21.0050). Moisture Sensitivity Level is 1 (Unlimited) for all parts, indicating no special handling requirements.

Q: Which substitute part offers the best availability?

A: TPSA475K010R1400 (KYOCERA AVX TPS series) has the highest inventory level at 57,672 units. This part also features the lowest ESR at 1.4 Ohm, providing both availability and improved performance characteristics.

Q: Can I use TR3A475K010C1500 as a direct replacement in existing designs?

A: Yes, with the package height consideration noted above. TR3A475K010C1500 maintains all electrical specifications and is physically compatible with 1206 (3216 Metric) footprints. The 1.5 Ohm ESR provides improved performance compared to the main part's 5 Ohm ESR.

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