T491D335M050AS Equivalent & Substitute Parts

Part Overview

The T491D335M050AS is a 3.3 µF molded tantalum capacitor rated at 50 V with ±20% tolerance, manufactured by KEMET in the 2917 (7343 Metric) package. This component is classified as obsolete, indicating discontinuation from the manufacturer. Identification of equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for applications utilizing this capacitor specification.

Key Parameters

Parameter	Value
Capacitance	3.3 µF
Tolerance	±20%
Voltage - Rated	50 V
Type	Molded Tantalum
ESR (Equivalent Series Resistance)	2 Ohm
Operating Temperature Range	-55°C to 125°C
Mounting Type	Surface Mount
Package / Case	2917 (7343 Metric)
Physical Dimensions	0.287" L x 0.169" W (7.30 mm x 4.30 mm)
Height - Seated (Max)	0.122" (3.10 mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the T491D335M050AS is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Capacitance: 3.3 µF (exact match required)
Voltage Rating: 50 V (exact match required)
Package / Case: 2917 (7343 Metric) (exact match required)
Mounting Type: Surface Mount (exact match required)
Operating Temperature Range: -55°C to 125°C (exact match required)
Tolerance: ±20% (exact match for direct equivalents; ±10% represents an upgrade)
ESR: 2 Ohm nominal (minor variations acceptable within 0.3 Ohm)

Substitution Categories:

Direct Equivalents: Parts meeting all primary criteria with identical electrical and mechanical specifications. These include T491D335M050AT (KEMET, active status), TAJD335M050H and TAJD335M050HNJ (KYOCERA AVX, active status), and 293D335X0050D2TE3 (Vishay Sprague, active status).

Upgrade Substitute: TAJD335K050H represents a tolerance upgrade from ±20% to ±10% while maintaining all other specifications. This part is suitable for applications requiring tighter capacitance tolerance.

Parameter Comparison

Parameter	T491D335M050AS (Main)	T491D335M050AT	TAJD335M050H	TAJD335M050HNJ	TAJD335K050H	293D335X0050D2TE3
Manufacturer	KEMET	KEMET	KYOCERA AVX	KYOCERA AVX	KYOCERA AVX	Vishay Sprague
Capacitance	3.3 µF	3.3 µF	3.3 µF	3.3 µF	3.3 µF	3.3 µF
Tolerance	±20%	±20%	±20%	±20%	±10%	±20%
Voltage - Rated	50 V	50 V	50 V	50 V	50 V	50 V
Type	Molded	Molded	Molded	Molded	Molded	Molded
ESR (Equivalent Series Resistance)	2 Ohm	2 Ohm	2 Ohm	2 Ohm	2 Ohm	1.7 Ohm
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)	2917 (7343 Metric)
Physical Dimensions	0.287" L x 0.169" W (7.30 mm x 4.30 mm)	0.287" L x 0.169" W (7.30 mm x 4.30 mm)	0.287" L x 0.169" W (7.30 mm x 4.30 mm)	0.287" L x 0.169" W (7.30 mm x 4.30 mm)	0.287" L x 0.169" W (7.30 mm x 4.30 mm)	0.287" L x 0.169" W (7.30 mm x 4.30 mm)
Height - Seated (Max)	0.122" (3.10 mm)	0.122" (3.10 mm)	0.122" (3.10 mm)	0.122" (3.10 mm)	0.122" (3.10 mm)	0.122" (3.10 mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Electrical and Mechanical Equivalence):

T491D335M050AT is the primary direct substitute. This KEMET part maintains identical electrical specifications and physical dimensions while offering active product status and ROHS3 compliance. Availability is confirmed at 3598 units in stock with Cut Tape and Digi-Reel packaging options.

TAJD335M050HNJ (KYOCERA AVX) and TAJD335M050H (KYOCERA AVX) are functionally equivalent alternatives. TAJD335M050HNJ is available in Tape & Reel packaging with 1084 units in stock. Both parts maintain the 2 Ohm ESR specification and full operating temperature range.

293D335X0050D2TE3 (Vishay Sprague) is a direct electrical equivalent with a marginally lower ESR of 1.7 Ohm, which may provide improved performance in high-frequency applications. This part carries ROHS3 compliance and is available in Tape & Reel packaging with 890 units in stock.

For Enhanced Tolerance Requirements:

TAJD335K050H provides ±10% tolerance in place of the original ±20% specification. This upgrade substitute is suitable for applications requiring tighter capacitance control while maintaining all other electrical and mechanical parameters. Active product status and 848 units in stock are confirmed.

Compliance Considerations:

Applications subject to RoHS3 requirements should prioritize T491D335M050AT or 293D335X0050D2TE3. The original T491D335M050AS and KYOCERA AVX alternatives (TAJD335M050H, TAJD335M050HNJ, TAJD335K050H) are RoHS non-compliant.

TAJD335M050HNJ carries REACH Affected status, while all other alternatives are REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can T491D335M050AT be used as a direct replacement for T491D335M050AS?

A: Yes. T491D335M050AT is a direct equivalent substitute. Both parts share identical capacitance (3.3 µF), voltage rating (50 V), tolerance (±20%), ESR (2 Ohm), package (2917/7343 Metric), and operating temperature range (-55°C to 125°C). The primary difference is product status: T491D335M050AT is active with confirmed availability, while T491D335M050AS is obsolete.

Q: What is the difference between the KEMET T491 series and KYOCERA AVX TAJ series substitutes?

A: Both series are molded tantalum capacitors with identical electrical specifications for the 3.3 µF 50 V 2917 package variants. The primary differences are manufacturer, product status (all TAJ variants are active), and RoHS compliance status. KEMET T491D335M050AT is ROHS3 compliant, while KYOCERA AVX TAJ variants are RoHS non-compliant.

Q: Is TAJD335K050H compatible with the original design?

A: TAJD335K050H is mechanically and electrically compatible with identical package dimensions, voltage rating, and operating temperature range. The tolerance specification differs: TAJD335K050H offers ±10% tolerance compared to the original ±20%. This represents an upgrade in capacitance accuracy and is suitable for applications where tighter tolerance is beneficial or required.

Q: What does the ESR difference between 2 Ohm and 1.7 Ohm mean for 293D335X0050D2TE3?

A: The 293D335X0050D2TE3 (Vishay Sprague) has a lower ESR of 1.7 Ohm compared to the 2 Ohm specification of the original part. Lower ESR reduces impedance at high frequencies and may improve performance in ripple current applications. This part is functionally compatible and represents a performance enhancement option.

Q: Are there packaging differences between the substitute parts?

A: Yes. T491D335M050AT is available in Cut Tape (CT) and Digi-Reel packaging. TAJD335M050HNJ and 293D335X0050D2TE3 are supplied in Tape & Reel (TR) format. TAJD335M050H and TAJD335K050H packaging specifications are not detailed. Verify packaging requirements for your assembly process before selection.

Q: Which substitute offers the best compliance profile?

A: T491D335M050AT and 293D335X0050D2TE3 both carry ROHS3 compliance. T491D335M050AT is REACH Unaffected. 293D335X0050D2TE3 is REACH Unaffected. All KYOCERA AVX TAJ variants are RoHS non-compliant; TAJD335M050HNJ is REACH Affected. For maximum regulatory compliance, select T491D335M050AT or 293D335X0050D2TE3.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: Yes, all listed direct equivalents (T491D335M050AT, TAJD335M050H, TAJD335M050HNJ, 293D335X0050D2TE3) are electrically and mechanically interchangeable. TAJD335K050H is also interchangeable but offers tighter tolerance. Verify that your procurement and assembly processes accommodate multiple manufacturer part numbers if cross-sourcing is intended.

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