F321A476MBA Equivalent & Substitute Parts

Part Overview

The Nichicon F321A476MBA is a 47 µF molded tantalum polymer capacitor rated at 10 V with 70 mOhm ESR @ 100 kHz in a 1411 (3528 Metric) surface mount package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Capacitance	47 µF
Voltage Rating	10 V
ESR @ 100 kHz	70 mOhm
Package / Case	1411 (3528 Metric)
Tolerance	±20%
Type	Molded Tantalum Polymer
Operating Temperature Range	-55°C ~ 105°C
Mounting Type	Surface Mount
Size / Dimension	0.138" L x 0.110" W (4.60 mm x 2.80 mm)
Height - Seated (Max)	0.083" (2.10 mm)
Product Status	Obsolete

Substitute Part Grouping Explanation

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

Primary Substitution Criteria:

Capacitance: 47 µF (exact match required)
Voltage Rating: 10 V (exact match required)
Package / Case: 1411 (3528 Metric) (exact match required)
Tolerance: ±20% (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)
Mounting Type: Surface Mount (exact match required)

Secondary Consideration:

ESR @ 100 kHz: 70 mOhm (primary specification); lower ESR values (35 mOhm) are electrically compatible but represent enhanced performance; higher ESR values (150 mOhm) remain functionally compatible within the same electrical class

Physical Compatibility:

Height variation within seated maximum limits is acceptable for PCB assembly compatibility

Substitute parts are grouped into two categories:

Direct Electrical Equivalents (70 mOhm ESR): Parts matching all primary criteria including ESR specification.

Parametric Equivalents (Alternative ESR): Parts matching all primary criteria with ESR values differing from the original specification but within acceptable operational parameters for the 47 µF / 10 V / 1411 package class.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	ESR @ 100 kHz	Package	Height Max	Product Status	RoHS Status
F321A476MBA	Nichicon	47 µF	10 V	70 mOhm	1411	0.083" (2.10 mm)	Obsolete	REACH Unaffected
10TAB47M	Panasonic	47 µF	10 V	70 mOhm	1411	0.079" (2.00 mm)	Active	ROHS3 Compliant
10TPB47M	Panasonic	47 µF	10 V	70 mOhm	1411	0.079" (2.00 mm)	Active	ROHS3 Compliant
10TPG47M	Panasonic	47 µF	10 V	70 mOhm	1411	0.047" (1.20 mm)	Last Time Buy	ROHS3 Compliant
T520B476M010AHE070	KEMET	47 µF	10 V	70 mOhm	1411	0.079" (2.00 mm)	Active	RoHS non-compliant
T520B476M010ATE035	KEMET	47 µF	10 V	35 mOhm	1411	0.079" (2.00 mm)	Active	ROHS3 Compliant
T520B476M010ATE070	KEMET	47 µF	10 V	70 mOhm	1411	0.079" (2.00 mm)	Active	ROHS3 Compliant
T55B476M010C0070	Vishay Sprague	47 µF	10 V	70 mOhm	1411	0.083" (2.10 mm)	Active	ROHS3 Compliant
T55B476M010C0150	Vishay Sprague	47 µF	10 V	150 mOhm	1411	0.083" (2.10 mm)	Active	ROHS3 Compliant
TCJB476M010R0070	KYOCERA AVX	47 µF	10 V	70 mOhm	1210	0.083" (2.10 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Active Production (RoHS3 Compliant):

T520B476M010ATE070 (KEMET) and T55B476M010C0070 (Vishay Sprague) are direct electrical and mechanical equivalents with active product status and full RoHS3 compliance. Both maintain 70 mOhm ESR specification and 1411 package compatibility.

10TAB47M and 10TPB47M (Panasonic) provide active alternatives with RoHS3 compliance and reduced seated height (0.079" vs. 0.083"), offering improved PCB assembly clearance while maintaining all electrical parameters.

For Enhanced Performance (Lower ESR):

T520B476M010ATE035 (KEMET) delivers 35 mOhm ESR with identical capacitance, voltage, and package specifications. This part is active and RoHS3 compliant, suitable for applications requiring reduced impedance characteristics.

For Legacy Compatibility:

T55B476M010C0150 (Vishay Sprague) maintains 1411 package and electrical class with 150 mOhm ESR. This part is active and RoHS3 compliant but exhibits higher impedance than the original specification.

Not Recommended for Direct Substitution:

TCJB476M010R0070 (KYOCERA AVX) uses 1210 package designation, which differs from the 1411 specification despite identical physical dimensions. This creates potential documentation and traceability issues.

T520B476M010AHE070 (KEMET) is active but RoHS non-compliant, unsuitable for new designs subject to RoHS3 requirements.

10TPG47M (Panasonic) carries Last Time Buy status, indicating discontinued production trajectory.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with different ESR (35 mOhm or 150 mOhm)?

A: Yes. ESR variation within the 47 µF / 10 V / 1411 class remains functionally compatible. Lower ESR (35 mOhm) reduces impedance and heat generation. Higher ESR (150 mOhm) increases impedance but maintains voltage and capacitance ratings. Circuit performance impact depends on application-specific ripple current and frequency requirements.

Q: What is the significance of package designation differences (1411 vs. 1210)?

A: Both designations reference identical physical dimensions (4.60 mm x 2.80 mm). However, using different package codes creates documentation inconsistency and potential assembly errors. Maintain original 1411 designation for design continuity.

Q: Are all substitute parts suitable for new designs?

A: Parts with Active product status and RoHS3 compliance are suitable for new designs. T520B476M010ATE070, T55B476M010C0070, 10TAB47M, and 10TPB47M meet these criteria. Avoid Last Time Buy and RoHS non-compliant parts for new production.

Q: How does seated height variation affect PCB assembly?

A: Reduced seated height (0.047" to 0.079" vs. 0.083") improves clearance for adjacent components and solder joint inspection. This is beneficial for high-density layouts. Increased height remains compatible if original design accommodates 0.083" maximum.

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

A: Both are surface mount compatible. Tape & Reel (TR) suits high-volume automated assembly. Cut Tape (CT) & Digi-Reel® accommodates lower volumes and mixed component orders. Electrical performance is identical.

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