6TPC47MB Equivalent & Substitute Parts

Part Overview

The 6TPC47MB is a 47 µF molded tantalum polymer capacitor rated at 6.3 V in a 1411 (3528 Metric) surface mount package, manufactured by Panasonic Electronic Components as part of the POSCAP™ TPC series. This component is designated as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Capacitance	47 µF
Voltage Rating	6.3 V
Package / Case	1411 (3528 Metric)
Type	Molded Tantalum Polymer
ESR @ 100kHz	70 mOhm
Operating Temperature Range	-55°C to 105°C
Tolerance	±20%
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the 6TPC47MB is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 47 µF (exact match required)
Package / Case: 1411 (3528 Metric) (physical and electrical compatibility)
Mounting Type: Surface Mount (assembly compatibility)
Tolerance: ±20% (electrical performance tolerance)

Allowable Variation Parameters:

Voltage Rating: May be equal to or higher than 6.3 V (higher voltage ratings provide backward compatibility)
ESR @ 100kHz: May be equal to or lower than 70 mOhm (lower ESR improves performance)
Type: Molded tantalum polymer or conformal coated tantalum (both acceptable for general purpose applications)
Operating Temperature Range: Must encompass or exceed -55°C to 105°C
Product Status: Active status preferred; Last Time Buy acceptable for existing designs

Substitute parts are grouped into three categories: MFR Recommended (manufacturer-endorsed alternatives), Similar (functionally equivalent with minor parameter differences), and Parametric Equivalent (identical electrical specifications with different manufacturers or packaging).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage Rating	Type	ESR @ 100kHz	Package	Height (Max)	Product Status	RoHS Status
6TPC47MB	Panasonic	47 µF	6.3 V	Molded	70 mOhm	1411 (3528 Metric)	0.047" (1.20 mm)	Last Time Buy	ROHS3 Compliant
10TPE47MAZB	Panasonic	47 µF	10 V	Molded	35 mOhm	1411 (3528 Metric)	0.079" (2.00 mm)	Active	ROHS3 Compliant
F951A476MBAAQ2	KYOCERA AVX	47 µF	10 V	Conformal Coated	400 mOhm	1411 (3528 Metric)	0.079" (2.00 mm)	Active	ROHS3 Compliant
T520T476M006ATE070	KEMET	47 µF	6.3 V	Molded	70 mOhm	1411 (3528 Metric)	0.047" (1.20 mm)	Active	ROHS3 Compliant
T520T476M006AHE070	KEMET	47 µF	6.3 V	Molded	70 mOhm	1411 (3528 Metric)	0.047" (1.20 mm)	Active	RoHS Non-Compliant
T55T476M6R3C0070	Vishay Sprague	47 µF	6.3 V	Molded	70 mOhm	1411 (3528 Metric)	0.047" (1.20 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: T520T476M006ATE070 (KEMET)

This part provides exact parametric equivalence to the 6TPC47MB with identical capacitance (47 µF), voltage rating (6.3 V), ESR (70 mOhm @ 100kHz), and package dimensions. Active product status ensures long-term availability. ROHS3 compliance aligns with current regulatory requirements. Higher inventory availability (6373 pcs) supports production continuity.

Secondary Recommendation: T55T476M6R3C0070 (Vishay Sprague)

This part matches all critical electrical parameters and physical dimensions of the original component. Active status and ROHS3 compliance provide regulatory alignment. Adequate inventory (4300 pcs) supports component sourcing.

Alternative with Enhanced Performance: 10TPE47MAZB (Panasonic)

This part maintains the same manufacturer as the original component, ensuring design continuity within the Panasonic ecosystem. The 10 V voltage rating provides higher safety margin than the 6.3 V original specification. Superior ESR performance (35 mOhm vs. 70 mOhm) reduces heat generation and improves circuit efficiency. Active product status guarantees availability. ROHS3 compliance is maintained. Height increase (2.00 mm vs. 1.20 mm) requires PCB layout verification.

Not Recommended: T520T476M006AHE070 (KEMET)

Although parametrically equivalent, this part carries RoHS non-compliant status, which conflicts with current regulatory and procurement standards for new designs.

Not Recommended: F951A476MBAAQ2 (KYOCERA AVX)

The conformal coated construction and significantly higher ESR (400 mOhm) represent substantial deviations from the original specification. This part is suitable only for specialized applications requiring conformal coating protection.

Frequently Asked Questions (FAQ)

Q: Can I use a higher voltage-rated capacitor as a substitute?

A: Yes. A capacitor rated at 10 V can replace a 6.3 V rated capacitor in the same circuit. Higher voltage ratings provide increased safety margin and do not degrade circuit performance. The 10TPE47MAZB (10 V) is a direct functional upgrade to the 6TPC47MB (6.3 V).

Q: Does the height difference between substitute parts affect PCB compatibility?

A: Yes. The 6TPC47MB has a maximum seated height of 0.047" (1.20 mm), while the 10TPE47MAZB measures 0.079" (2.00 mm). PCB layout and component clearance must be verified before substitution. Parts with identical height (T520T476M006ATE070, T55T476M6R3C0070) require no layout modification.

Q: What does ESR mean and why does it matter?

A: ESR (Equivalent Series Resistance) is the internal resistance of the capacitor at 100 kHz. Lower ESR values reduce heat generation and improve circuit performance. The 10TPE47MAZB (35 mOhm) provides superior ESR performance compared to the original 6TPC47MB (70 mOhm).

Q: Are all substitute parts RoHS compliant?

A: No. The T520T476M006AHE070 is RoHS non-compliant. For new designs and procurement requiring regulatory compliance, select only ROHS3 compliant alternatives: T520T476M006ATE070, T55T476M6R3C0070, or 10TPE47MAZB.

Q: What is the difference between "Molded" and "Conformal Coated" tantalum capacitors?

A: Molded tantalum capacitors feature a standard epoxy molded case. Conformal coated capacitors receive an additional protective coating for enhanced moisture and environmental resistance. The F951A476MBAAQ2 conformal coated option is suitable only for applications requiring this specialized protection; it is not a direct substitute for general purpose applications.

Q: Why is the 6TPC47MB marked as "Last Time Buy"?

A: Last Time Buy status indicates the manufacturer has discontinued production. Existing inventory may be available for a limited period, but long-term sourcing is not guaranteed. Transition to an active product such as T520T476M006ATE070 or 10TPE47MAZB is recommended for new designs.

Q: Can I mix different substitute parts in the same circuit board?

A: Yes, provided all selected parts meet the circuit's electrical requirements. However, using a single substitute part across the entire production run ensures consistency in performance, thermal characteristics, and supply chain management.

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