Equivalent & Substitute Parts for T494B476M010AS

Part Overview

The T494B476M010AS is a 47 µF molded tantalum capacitor manufactured by KEMET, rated for 10 V with ±20% tolerance and 650 mOhm equivalent series resistance (ESR). This component is housed in a 1411 (3528 Metric) surface mount package and operates across the temperature range of -55°C to 125°C with a 2000-hour lifetime specification at 125°C.

The T494B476M010AS is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives from KEMET and other manufacturers provide functionally compatible solutions with identical or comparable electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	47 µF
Voltage Rating	10 V
Tolerance	±20%
Type	Molded Tantalum
ESR (Equivalent Series Resistance)	650 mOhm
Operating Temperature Range	-55°C to 125°C
Package / Case	1411 (3528 Metric)
Mounting Type	Surface Mount
Size / Dimension	0.138" L × 0.110" W (3.50 mm × 2.80 mm)
Height - Seated (Max)	0.083" (2.10 mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the T494B476M010AS is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Capacitance: 47 µF (exact match required)
Voltage Rating: 10 V (exact match required)
Tolerance: ±20% (exact match required)
Package / Case: 1411 (3528 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)

Secondary Compatibility Parameters:

Type: Molded Tantalum (exact match required)
ESR: 650 mOhm or equivalent performance alternatives
Size / Dimension: 0.138" L × 0.110" W (3.50 mm × 2.80 mm) (exact match required)
RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level: 1 (Unlimited) or equivalent (exact match required)

Substitute parts are grouped into two categories:

Direct Equivalents (Identical ESR): Parts with 650 mOhm ESR matching the original specification exactly.

Functional Equivalents (Alternative ESR): Parts with ESR values differing from 650 mOhm but within acceptable performance parameters for the 47 µF, 10 V, 1411 package category. These alternatives maintain all other critical specifications and are suitable for applications where ESR variation does not impact circuit performance.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR	Package	Height (Max)	Operating Temp	Product Status	RoHS	MSL
T494B476M010AS	KEMET	47 µF	10 V	±20%	650 mOhm	1411	0.083" (2.10 mm)	-55°C to 125°C	Obsolete	ROHS3	1
T494B476M010AT	KEMET	47 µF	10 V	±20%	650 mOhm	1411	0.083" (2.10 mm)	-55°C to 125°C	Active	ROHS3	1
T491B476M010AT	KEMET	47 µF	10 V	±20%	1 Ohm	1411	0.083" (2.10 mm)	-55°C to 125°C	Active	ROHS3	1
TPSB476M010R0650	KYOCERA AVX	47 µF	10 V	±20%	650 mOhm	1411	0.083" (2.10 mm)	-55°C to 125°C	Active	ROHS3	1
293D476X0010B2TE3	Vishay Sprague	47 µF	10 V	±20%	1.8 Ohm	1411	0.083" (2.11 mm)	-55°C to 125°C	Active	ROHS3	1
593D476X0010B2TE3	Vishay Sprague	47 µF	10 V	±20%	600 mOhm	1411	0.083" (2.11 mm)	-55°C to 125°C	Active	ROHS3	1
TACT476M010RTA	KYOCERA AVX	47 µF	10 V	±20%	1 Ohm	1411	0.047" (1.20 mm)	-55°C to 125°C	Active	ROHS3	1
TACT476M010XTA	KYOCERA AVX	47 µF	10 V	±20%	1 Ohm	1411	0.047" (1.20 mm)	-55°C to 125°C	Active	ROHS3	1
TAJB476M010RNJ	KYOCERA AVX	47 µF	10 V	±20%	1 Ohm	1411	0.083" (2.10 mm)	-55°C to 125°C	Active	ROHS3	1
TAJB476M010SNJ	KYOCERA AVX	47 µF	10 V	±20%	1 Ohm	1411	0.083" (2.10 mm)	-55°C to 125°C	Active	ROHS3	1
TLJT476M010R0600	KYOCERA AVX	47 µF	10 V	±20%	600 mOhm	1411	0.047" (1.20 mm)	-55°C to 125°C	Active	ROHS3	3

Engineering Selection Recommendations

Primary Recommendation: T494B476M010AT (KEMET)

The T494B476M010AT is the direct equivalent to the obsolete T494B476M010AS. Both parts share identical electrical specifications (47 µF, 10 V, ±20%, 650 mOhm ESR), mechanical dimensions, and package configuration. The T494B476M010AT is classified as Active and maintains full ROHS3 compliance and MSL 1 rating. This part provides seamless design continuity with no circuit modifications required. Inventory availability is 2200 pieces.

Secondary Recommendation: TPSB476M010R0650 (KYOCERA AVX)

The TPSB476M010R0650 matches all critical specifications of the original part: 47 µF capacitance, 10 V rating, ±20% tolerance, and 650 mOhm ESR. Package dimensions and mounting type are identical. This part is Active with ROHS3 compliance and MSL 1 rating. Inventory availability is 18,780 pieces, providing strong supply continuity.

Alternative Recommendations (ESR Variation):

The following parts maintain all critical specifications except ESR, which differs from the original 650 mOhm specification:

T491B476M010AT (KEMET): 1 Ohm ESR, Active status, 17,307 pieces available
293D476X0010B2TE3 (Vishay Sprague): 1.8 Ohm ESR, Active status, 15,102 pieces available
593D476X0010B2TE3 (Vishay Sprague): 600 mOhm ESR, Active status, 875 pieces available
TAJB476M010RNJ (KYOCERA AVX): 1 Ohm ESR, Active status, 565,200 pieces available
TAJB476M010SNJ (KYOCERA AVX): 1 Ohm ESR, Active status, 8,909 pieces available
TACT476M010RTA (KYOCERA AVX): 1 Ohm ESR, reduced height (0.047"), Active status, 1,082 pieces available
TACT476M010XTA (KYOCERA AVX): 1 Ohm ESR, reduced height (0.047"), Active status, 1,243 pieces available
TLJT476M010R0600 (KYOCERA AVX): 600 mOhm ESR, reduced height (0.047"), Active status, MSL 3, 1,682 pieces available

All alternative parts maintain the 1411 (3528 Metric) package, surface mount configuration, -55°C to 125°C operating range, and ROHS3 compliance. Selection among alternatives depends on circuit-specific ESR requirements and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can I use T494B476M010AT as a direct replacement for T494B476M010AS?

A: Yes. The T494B476M010AT is a direct equivalent. Both parts have identical capacitance (47 µF), voltage rating (10 V), tolerance (±20%), ESR (650 mOhm), package (1411), and operating temperature range (-55°C to 125°C). The primary difference is product status: T494B476M010AS is obsolete while T494B476M010AT is active. No circuit modifications are required.

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

A: ESR (Equivalent Series Resistance) affects the impedance characteristics of the capacitor at high frequencies and influences ripple current handling capability. The original T494B476M010AS specifies 650 mOhm ESR. Substitute parts with different ESR values (such as 1 Ohm or 1.8 Ohm) will exhibit different frequency response characteristics. Selection of an alternative ESR value must be validated against circuit requirements, particularly in applications sensitive to impedance or ripple current performance.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant except for considerations regarding MSL rating. The TLJT476M010R0600 has MSL 3 (168 Hours) compared to MSL 1 (Unlimited) for other parts. MSL 3 requires controlled moisture exposure during storage and handling. All other parts maintain MSL 1 rating, identical to the original specification.

Q: What is the difference between packaging types (Tape & Reel vs. Cut Tape)?

A: Packaging type affects handling and assembly processes but does not alter electrical or mechanical specifications. Tape & Reel (TR) packaging is suitable for automated pick-and-place assembly. Cut Tape (CT) & Digi-Reel® packaging is used for manual or semi-automated assembly. Both packaging formats contain identical components with the same electrical performance.

Q: Can I use parts with reduced height (0.047" vs. 0.083") as substitutes?

A: Parts with reduced height such as TACT476M010RTA, TACT476M010XTA, and TLJT476M010R0600 maintain the same 1411 (3528 Metric) package designation and footprint. The reduced height (0.047" vs. 0.083") provides additional clearance in space-constrained designs. These parts are mechanically compatible with the original footprint and can be used as substitutes provided ESR and MSL requirements are satisfied.

Q: Which substitute part offers the best supply availability?

A: TAJB476M010RNJ (KYOCERA AVX) offers the highest inventory availability with 565,200 pieces in stock. This part maintains all critical specifications except ESR (1 Ohm vs. 650 mOhm original). For direct ESR equivalence, TPSB476M010R0650 (KYOCERA AVX) with 18,780 pieces provides strong availability while matching the original 650 mOhm specification.

Q: Are there any lifetime or temperature rating differences among substitute parts?

A: The original T494B476M010AS specifies 2000 hours lifetime at 125°C. Most substitute parts do not provide explicit lifetime specifications in the available data. All substitute parts maintain the identical operating temperature range of -55°C to 125°C. For applications requiring specific lifetime guarantees, contact the manufacturer for detailed reliability data.

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