TAJS475K010YNJ Equivalent & Substitute Parts

Part Overview

The TAJS475K010YNJ is a 4.7 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 10 V with ±10% tolerance. This surface mount component in 1206 (3216 Metric) package 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 ESR characteristics are required for circuit optimization.

Key Parameters

Parameter	Value	Unit
Capacitance	4.7	µF
Tolerance	±10%	—
Voltage - Rated	10	V
Package / Case	1206 (3216 Metric)	—
Mounting Type	Surface Mount	—
Type	Molded	—
Operating Temperature Range	-55°C to 125°C	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution validity for the TAJS475K010YNJ 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: 1206 (3216 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Type: Molded Tantalum (exact match required)
Operating Temperature: -55°C to 125°C (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

Secondary Parameter Variation:

ESR (Equivalent Series Resistance): Allowed to vary. Lower ESR values provide improved high-frequency performance and reduced thermal dissipation. Higher ESR values remain functionally compatible for general-purpose applications.
Height - Seated (Max): Allowed to vary within mechanical constraints. Original part maximum height is 0.047" (1.20mm); substitute parts with heights up to 0.071" (1.80mm) remain compatible for standard PCB assembly.
Packaging Format: Allowed to vary (Cut Tape, Digi-Reel, Tape & Reel formats are interchangeable for component procurement).

All nine substitute parts listed meet these criteria and are direct functional equivalents to TAJS475K010YNJ.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	ESR (Ohm)	Height Max (mm)	Package	RoHS Status	Inventory (Pcs)
TAJS475K010YNJ	KYOCERA AVX	TAJ	4.7	10	±10%	5	1.20	1206	ROHS3	1011
TAJA475K010RNJ	KYOCERA AVX	TAJ	4.7	10	±10%	5	1.80	1206	ROHS3	2300
TPSA475K010R1400	KYOCERA AVX	TPS	4.7	10	±10%	1.4	1.80	1206	ROHS3	57672
293D475X9010A2TE3	Vishay Sprague	293D	4.7	10	±10%	5	1.80	1206	ROHS3	5622
593D475X9010A2TE3	Vishay Sprague	593D	4.7	10	±10%	3	1.80	1206	ROHS3	2400
T491A475K010AT	KEMET	T491	4.7	10	±10%	5	1.80	1206	ROHS3	1210
T494A475K010AT	KEMET	T494	4.7	10	±10%	3	1.80	1206	ROHS3	2100
T495A475K010ATE1K3	KEMET	T495	4.7	10	±10%	1.3	1.80	1206	ROHS3	6700
TR3A475K010C1000	Vishay Sprague	TR3	4.7	10	±10%	1	1.80	1206	ROHS3	3122
TR3A475K010C1400	Vishay Sprague	TR3	4.7	10	±10%	1.4	1.80	1206	ROHS3	4487
TR3A475K010C1500	Vishay Sprague	TR3	4.7	10	±10%	1.5	1.80	1206	ROHS3	1451

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original TAJS475K010YNJ. Selection among substitutes should be based on:

ESR Considerations: The original part specifies 5Ohm ESR. Substitutes with lower ESR values (1Ohm to 1.5Ohm range) provide reduced impedance at high frequencies and lower thermal dissipation, beneficial for noise-sensitive or high-current ripple applications. Substitutes matching the 5Ohm ESR specification (TAJA475K010RNJ, 293D475X9010A2TE3, T491A475K010AT) provide direct electrical equivalence.

Manufacturer Availability: KYOCERA AVX TPSA475K010R1400 offers the highest inventory (57,672 pcs), providing supply chain security. KEMET T495A475K010ATE1K3 (6,700 pcs) and Vishay Sprague TR3A475K010C1400 (4,487 pcs) represent secondary availability options.

Packaging Format: All substitutes are available in standard tape and reel or cut tape formats suitable for automated assembly. Format selection depends on procurement volume and assembly line requirements.

Thermal Performance: KEMET series (T491, T494, T495) specify 2000 Hrs lifetime at elevated temperature (125°C or 85°C), providing documented reliability data for mission-critical applications.

Frequently Asked Questions (FAQ)

Q: Can TAJS475K010YNJ be replaced with any of the listed substitutes without circuit redesign?

A: Yes. All listed parts are direct functional equivalents meeting identical electrical specifications (4.7 µF, 10 V, ±10% tolerance) and mechanical compatibility (1206 package, surface mount). No circuit redesign is required for board-level replacement.

Q: What is the significance of ESR variation among substitutes?

A: ESR (Equivalent Series Resistance) affects high-frequency impedance and thermal dissipation. Lower ESR values (1Ohm to 1.5Ohm) reduce noise and heat generation in high-ripple-current applications. Higher ESR values (5Ohm) match the original specification and are suitable for general-purpose filtering. Circuit performance remains within specification across the entire ESR range provided.

Q: Are there height clearance concerns when substituting TAJS475K010YNJ with taller alternatives?

A: The original part has a maximum seated height of 1.20mm. Most substitutes have a maximum height of 1.80mm. Verify PCB layout clearance for components above the board surface. Standard PCB assembly processes accommodate this height variation without modification.

Q: Do all substitutes carry the same compliance certifications?

A: Yes. All listed substitutes are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8532.21.0050, matching the original part's regulatory status.

Q: Which substitute offers the best supply availability?

A: KYOCERA AVX TPSA475K010R1400 (TPS series) provides the highest current inventory at 57,672 pieces, followed by KEMET T495A475K010ATE1K3 at 6,700 pieces.

Q: Can substitutes be mixed on the same PCB?

A: Yes. All substitutes are electrically and mechanically compatible. Mixed substitution across a single board is permissible and does not affect circuit performance, provided each position meets the application's ESR and thermal requirements.

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