Equivalent & Substitute Parts for 1879057-4

Part Overview

The TE Connectivity 1879057-4 is a 47 µF molded tantalum capacitor rated at 16 V with a 2917 (7343 Metric) package footprint. This component operates across a temperature range of -55°C to 125°C and features 900 mOhm equivalent series resistance. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Capacitance	47 µF
Voltage Rating	16 V
Tolerance	±10%
Type	Molded Tantalum
ESR (Equivalent Series Resistance)	900 mOhm
Operating Temperature Range	-55°C to 125°C
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
Moisture Sensitivity Level	MSL 1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 1879057-4 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Direct Substitution:

Capacitance: 47 µF (exact match required)
Voltage Rating: 16 V minimum (equal or higher voltage ratings are acceptable)
Tolerance: ±10%
Package / Case: 2917 (7343 Metric)
Mounting Type: Surface Mount
Type: Molded Tantalum
Operating Temperature Range: -55°C to 125°C minimum
Moisture Sensitivity Level: MSL 1

Parameter Variations Permitted:

ESR (Equivalent Series Resistance): Values between 150 mOhm and 900 mOhm are acceptable within the same package footprint
Height - Seated (Max): Variations permitted within mechanical constraints of the 2917 package
Manufacturer Size Code: May vary (X, Y, D designations)
Voltage Rating: Parts rated at 20 V or 25 V are upgrades and function in 16 V applications

Substitute parts are grouped into three categories: direct equivalents (matching 16 V rating), voltage upgrades (20 V and 25 V ratings), and similar alternatives from different manufacturers with comparable electrical characteristics.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage Rating	Tolerance	ESR (mOhm)	Package	Operating Temp Range	Product Status	RoHS Status
1879057-4	TE Connectivity	47 µF	16 V	±10%	900	2917 (7343)	-55°C to 125°C	Obsolete	Not specified
TAJX476K016RNJ	KYOCERA AVX	47 µF	16 V	±10%	900	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
TAJD476K020RNJ	KYOCERA AVX	47 µF	20 V	±10%	900	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
TAJD476K025RNJ	KYOCERA AVX	47 µF	25 V	±10%	900	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
TAJY476K020RNJ	KYOCERA AVX	47 µF	20 V	±10%	900	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
TAJY476K025RNJ	KYOCERA AVX	47 µF	25 V	±10%	900	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
THJD476K016RJN	KYOCERA AVX	47 µF	16 V	±10%	900	2917 (7343)	-55°C to 175°C	Active	ROHS3 Compliant
293D476X9016D2TE3	Vishay Sprague	47 µF	16 V	±10%	700	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
293D476X9016E2TE3	Vishay Sprague	47 µF	16 V	±10%	800	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
593D476X9016D2TE3	Vishay Sprague	47 µF	16 V	±10%	150	2917 (7343)	-55°C to 125°C	Active	ROHS3 Compliant
T491D476K016AH	KEMET	47 µF	16 V	±10%	800	2917 (7343)	-55°C to 125°C	Active	RoHS non-compliant

Engineering Selection Recommendations

Direct Equivalent (16 V Rating):

TAJX476K016RNJ from KYOCERA AVX is the primary direct equivalent to 1879057-4. This part maintains identical electrical specifications (47 µF, 16 V, ±10%, 900 mOhm ESR) and mechanical compatibility within the 2917 package. The part is active and ROHS3 compliant, addressing the obsolescence of the original component. Inventory availability is 775 pieces.

Voltage Upgrade Options (20 V and 25 V Ratings):

TAJD476K020RNJ, TAJY476K020RNJ, TAJD476K025RNJ, and TAJY476K025RNJ are voltage-upgraded alternatives from KYOCERA AVX. These parts maintain 47 µF capacitance and ±10% tolerance while providing higher voltage ratings of 20 V or 25 V. These upgrades are electrically compatible in applications where the original 16 V rating is specified, as higher-rated components function in lower-voltage circuits. All are active and ROHS3 compliant.

Extended Temperature Range Option:

THJD476K016RJN from KYOCERA AVX provides identical electrical specifications to the original part (47 µF, 16 V, 900 mOhm ESR) with an extended operating temperature range of -55°C to 175°C. This part is rated for automotive applications (AEC-Q200) and is ROHS3 compliant. Selection of this part is appropriate for applications requiring enhanced thermal performance.

Alternative Manufacturers:

Vishay Sprague TANTAMOUNT™ series parts (293D476X9016D2TE3, 293D476X9016E2TE3, 593D476X9016D2TE3) and KEMET T491D476K016AH provide functional equivalence with variations in ESR. The Vishay 593D476X9016D2TE3 offers significantly lower ESR (150 mOhm) compared to the original specification. KEMET T491D476K016AH is RoHS non-compliant and should be selected only where legacy compliance requirements apply.

All substitute parts maintain the 2917 (7343 Metric) package footprint, surface mount configuration, MSL 1 moisture sensitivity rating, and -55°C to 125°C operating temperature range (except THJD476K016RJN). Selection should prioritize active, ROHS3-compliant parts from KYOCERA AVX for new designs and production applications.

Frequently Asked Questions (FAQ)

Q: Can TAJX476K016RNJ directly replace 1879057-4 without circuit modification?

A: Yes. TAJX476K016RNJ is a direct electrical and mechanical equivalent. Both parts share identical capacitance (47 µF), voltage rating (16 V), tolerance (±10%), ESR (900 mOhm), package footprint (2917), and operating temperature range (-55°C to 125°C). No circuit modifications are required.

Q: What is the difference between TAJX476K016RNJ and TAJD476K020RNJ?

A: The primary difference is voltage rating. TAJX476K016RNJ is rated at 16 V, while TAJD476K020RNJ is rated at 20 V. Both maintain 47 µF capacitance and 900 mOhm ESR. The 20 V part is a voltage upgrade suitable for applications originally specified at 16 V. Height-seated dimensions also differ: TAJX476K016RNJ is 0.059" (1.50 mm) while TAJD476K020RNJ is 0.122" (3.10 mm).

Q: Are there packaging differences between substitute parts?

A: Yes. TAJX476K016RNJ is supplied in Tape & Reel (TR) packaging. TAJD476K020RNJ, TAJD476K025RNJ, TAJY476K025RNJ are supplied in Cut Tape (CT) & Digi-Reel® packaging. TAJY476K020RNJ is supplied in Tape & Reel (TR). Packaging selection depends on assembly process requirements and order quantities.

Q: Why does 593D476X9016D2TE3 have significantly lower ESR (150 mOhm) than the original part (900 mOhm)?

A: ESR variation within the same capacitance, voltage, and package specifications reflects different internal construction and material composition. Lower ESR values indicate improved high-frequency performance and reduced heat generation. The 593D476X9016D2TE3 is a performance upgrade suitable for applications sensitive to ESR characteristics.

Q: Is THJD476K016RJN suitable for automotive applications?

A: Yes. THJD476K016RJN carries AEC-Q200 automotive qualification and extends the operating temperature range to -55°C to 175°C. This part is appropriate for automotive and high-reliability applications requiring enhanced thermal performance and automotive-grade certification.

Q: What is the significance of the Manufacturer Size Code (X, Y, D) designations?

A: Manufacturer Size Code designations (X, Y, D) indicate physical height variations within the same 2917 package footprint. Code X corresponds to 0.059" (1.50 mm) height, Code Y to 0.079" (2.00 mm), and Code D to 0.122" (3.10 mm). Selection depends on available PCB clearance and mechanical constraints.

Q: Are all substitute parts ROHS3 compliant?

A: All KYOCERA AVX and Vishay Sprague parts listed are ROHS3 compliant. KEMET T491D476K016AH is RoHS non-compliant and should be selected only for legacy applications where RoHS compliance is not required.

Q: Can 1879057-4 be replaced with a higher voltage-rated part such as TAJD476K025RNJ?

A: Yes. Higher voltage-rated capacitors function correctly in applications specified for lower voltages. TAJD476K025RNJ (25 V rating) is electrically compatible in circuits originally designed for 16 V operation. This approach provides design margin and extended component life.

Q: What inventory considerations apply when selecting substitute parts?

A: Current inventory levels vary significantly. TAJD476K025RNJ has the highest inventory (5931 pieces), while TAJX476K016RNJ has 775 pieces. Inventory availability should be evaluated against production schedules and supply chain requirements.

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