T491D107M010AS Equivalent & Substitute Parts

Part Overview

The T491D107M010AS is a 100 µF molded tantalum capacitor rated at 10 V with ±20% tolerance, manufactured by KEMET in the 2917 (7343 Metric) package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The part operates across a temperature range of -55°C to 125°C and features 700 mOhm equivalent series resistance (ESR) with surface mount configuration.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	10 V
Tolerance	±20%
Type	Molded Tantalum
Package / Case	2917 (7343 Metric)
ESR (Equivalent Series Resistance)	700 mOhm
Operating Temperature Range	-55°C to 125°C
Mounting Type	Surface Mount
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 of the T491D107M010AS is determined by strict equivalence across the following critical parameters: capacitance value (100 µF), voltage rating (10 V), package type (2917/7343 Metric), mounting configuration (surface mount), and physical dimensions. Parts are grouped into three categories based on substitution relationship:

Direct Manufacturer Equivalents maintain identical electrical specifications including capacitance, voltage, tolerance, and ESR characteristics. These parts differ only in product status (active versus obsolete) or packaging format (tape and reel versus cut tape).

Similar Manufacturer Parts share the same capacitance, voltage rating, package, and physical dimensions but differ in one or more electrical parameters such as ESR, tolerance, or lifetime specifications. These parts are electrically compatible within the constraints of the differing parameter.

Upgrade Parts provide enhanced performance characteristics, typically through improved tolerance or reduced ESR, while maintaining the same fundamental electrical ratings and package configuration.

The following parameters determine substitution eligibility:

Capacitance: 100 µF (fixed requirement)
Voltage Rating: 10 V (fixed requirement)
Package / Case: 2917 (7343 Metric) (fixed requirement)
Mounting Type: Surface Mount (fixed requirement)
Physical Dimensions: 0.287" L x 0.169" W, Height 0.122" max (fixed requirement)
Operating Temperature: -55°C to 125°C (fixed requirement)

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	ESR	Product Status	RoHS Status	Packaging
T491D107M010AS	KEMET	T491	100 µF	10 V	±20%	700 mOhm	Obsolete	RoHS Non-Compliant	Standard
T491D107M010AT	KEMET	T491	100 µF	10 V	±20%	700 mOhm	Active	RoHS3 Compliant	Cut Tape & Digi-Reel
T495D107M010AHE100	KEMET	T495	100 µF	10 V	±20%	100 mOhm	Active	RoHS Non-Compliant	Tape & Reel
TAJD107M010HNJ	KYOCERA AVX	TAJ	100 µF	10 V	±20%	700 mOhm	Active	RoHS Non-Compliant	Tape & Reel
TAJD107K010H	KYOCERA AVX	TAJ	100 µF	10 V	±10%	700 mOhm	Active	RoHS Non-Compliant	Standard
293D107X0010D2TE3	Vishay Sprague	293D	100 µF	10 V	±20%	600 mOhm	Active	RoHS3 Compliant	Cut Tape & Digi-Reel
TPSD107M010H0080	KYOCERA AVX	TPS	100 µF	10 V	±20%	80 mOhm	Active	RoHS Non-Compliant	Tape & Reel
TPSD107M010H0100	KYOCERA AVX	TPS	100 µF	10 V	±20%	100 mOhm	Active	RoHS Non-Compliant	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

T491D107M010AT is the primary direct equivalent to the obsolete T491D107M010AS. Both parts maintain identical electrical specifications: 100 µF capacitance, 10 V rating, ±20% tolerance, and 700 mOhm ESR. The T491D107M010AT carries active product status and RoHS3 compliance, making it suitable for new designs and procurement. Packaging differs (Cut Tape & Digi-Reel versus standard), which may affect procurement logistics but does not impact electrical performance or board-level compatibility.

TAJD107M010HNJ (KYOCERA AVX) provides an alternative direct equivalent with identical electrical specifications and active product status. This part is available in Tape & Reel packaging. RoHS non-compliance status is equivalent to the original part.

For Enhanced Performance (Reduced ESR):

T495D107M010AHE100, TPSD107M010H0080, and TPSD107M010H0100 offer reduced ESR characteristics (100 mOhm, 80 mOhm, and 100 mOhm respectively) compared to the original 700 mOhm specification. These parts maintain identical capacitance, voltage rating, tolerance, and package dimensions. Reduced ESR improves transient response and reduces heat dissipation in high-frequency applications. All three parts carry active product status.

For Improved Tolerance:

TAJD107K010H provides ±10% tolerance compared to the original ±20%, while maintaining all other electrical and physical specifications. This upgrade is suitable for applications requiring tighter capacitance accuracy. Product status is active.

For RoHS3 Compliance:

293D107X0010D2TE3 (Vishay Sprague) is the only substitute part with RoHS3 compliance status. It maintains the original ±20% tolerance and 100 µF / 10 V specifications with slightly reduced ESR (600 mOhm versus 700 mOhm). This part is suitable for applications requiring RoHS3 certification.

All substitute parts maintain the same operating temperature range (-55°C to 125°C), moisture sensitivity level (MSL 1), and surface mount configuration as the original part.

Frequently Asked Questions (FAQ)

Q: Can T491D107M010AT be used as a direct replacement for T491D107M010AS?

A: Yes. T491D107M010AT is a direct electrical equivalent with identical capacitance (100 µF), voltage rating (10 V), tolerance (±20%), ESR (700 mOhm), and package dimensions (2917/7343 Metric). The primary difference is product status (active versus obsolete) and packaging format. Both parts are electrically and mechanically compatible.

Q: What is the difference between the T491 and T495 series?

A: The T491D107M010AS and T495D107M010AHE100 both contain 100 µF at 10 V in the same 2917 package. The primary difference is ESR: T491 series specifies 700 mOhm while T495 series specifies 100 mOhm. The T495 series provides superior high-frequency performance and lower heat dissipation due to reduced ESR. Both series are molded tantalum capacitors with identical physical dimensions and operating temperature ranges.

Q: Are KYOCERA AVX and KEMET parts interchangeable?

A: TAJD107M010HNJ (KYOCERA AVX) and T491D107M010AT (KEMET) are electrically and mechanically interchangeable. Both provide 100 µF at 10 V with ±20% tolerance, 700 mOhm ESR, and identical package dimensions. Interchangeability is based on matching electrical specifications and physical footprint, not manufacturer identity.

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

A: ESR (Equivalent Series Resistance) represents the internal resistance of the capacitor. Lower ESR values reduce voltage ripple and heat generation in switching applications. The original T491D107M010AS specifies 700 mOhm ESR. Substitute parts with lower ESR (such as TPSD107M010H0080 at 80 mOhm) provide improved performance in high-frequency circuits but are not required for general-purpose applications where the original 700 mOhm specification is acceptable.

Q: Can I use a part with ±10% tolerance instead of ±20%?

A: Yes. TAJD107K010H provides ±10% tolerance, which is a tighter specification than the original ±20%. A part with tighter tolerance can be substituted for one with looser tolerance without functional degradation. The ±10% part will perform within the ±20% specification window, providing additional margin for capacitance accuracy.

Q: What is the significance of RoHS compliance status?

A: RoHS3 compliance indicates the part meets European Union restrictions on hazardous substances. The original T491D107M010AS is RoHS non-compliant. For applications requiring RoHS3 certification, 293D107X0010D2TE3 (Vishay Sprague) is the only substitute part with RoHS3 compliance. For applications without RoHS requirements, RoHS non-compliant parts remain functionally equivalent.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Cut Tape & Digi-Reel, Tape & Reel, or standard) affects procurement and handling logistics but does not alter electrical performance or board-level compatibility. All substitute parts with identical electrical specifications will perform identically regardless of packaging format.

Q: Can I substitute a part with lower ESR in a design that specifies 700 mOhm?

A: Yes. A part with lower ESR will perform within the original specification. Lower ESR provides improved transient response and reduced heat dissipation, which are beneficial characteristics. The design will function correctly with reduced ESR; no circuit modifications are required.

Q: What is MSL (Moisture Sensitivity Level) and why is it MSL 1?

A: MSL indicates the moisture sensitivity of the component during storage and handling. MSL 1 (Unlimited) means the part has no moisture sensitivity restrictions and does not require special storage conditions or baking procedures prior to soldering. All substitute parts maintain MSL 1 classification.

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