TAC105K020P01 Equivalent & Substitute Parts

Part Overview

The TAC105K020P01 is a 1 µF molded tantalum axial capacitor rated at 20 V with ±10% tolerance, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete and is no longer in active production. The TAC series represents legacy tantalum capacitor technology designed for general-purpose applications in through-hole configurations.

Due to the obsolete status of the TAC105K020P01, direct replacement with active production equivalents is necessary for new designs, repairs, and ongoing supply chain management. Substitute parts maintain identical electrical specifications (1 µF capacitance, 20 V rating, ±10% tolerance) while offering active product status and improved availability from current manufacturers including Vishay Sprague and KEMET.

Key Parameters

Parameter	Value	Substitution Relevance
Capacitance	1 µF	Critical - must match exactly
Voltage Rating	20 V	Critical - minimum acceptable rating
Tolerance	±10%	Critical - defines capacitance accuracy
Type	Molded Tantalum	Critical - component technology
Mounting Type	Through Hole	Critical - PCB assembly compatibility
Package / Case	Axial	Critical - physical form factor
Size / Dimension	0.095" Dia x 0.260" L (2.41mm x 6.60mm)	Important - board space constraints
Operating Temperature	-55°C ~ 125°C	Important - thermal environment compatibility
RoHS Status	Non-compliant	Regulatory - application dependent

Substitute Part Grouping Explanation

Substitute parts for the TAC105K020P01 are categorized into two groups based on electrical and mechanical compatibility:

Direct Equivalents (Same Specifications)

Direct equivalent substitutes maintain all critical parameters: 1 µF capacitance, 20 V voltage rating, ±10% tolerance, molded tantalum type, through-hole mounting, and axial package configuration. These parts are electrically and mechanically interchangeable with the original TAC105K020P01 in existing designs.

The following parts qualify as direct equivalents:

173D105X9020U (Vishay Sprague, Active, Tape & Box packaging)
173D105X9020UW (Vishay Sprague, Active, Tape & Reel packaging)
T322A105K020AS (KEMET, Active, Bulk packaging)

Upgrade Substitutes (Enhanced Specifications)

Upgrade substitutes maintain the 1 µF capacitance and through-hole axial configuration but offer improved tolerance (±5% instead of ±10%) and/or higher voltage ratings (25 V, 35 V, or 50 V). These parts are electrically compatible and provide enhanced performance margins for applications requiring tighter capacitance tolerance or higher voltage headroom.

Upgrade substitutes include:

173D105X5020UW (1 µF, ±5%, 20 V)
173D105X5025UW (1 µF, ±5%, 25 V)
173D105X5035V (1 µF, ±5%, 35 V)
173D105X5050VW (1 µF, ±5%, 50 V)
173D105X9025UW (1 µF, ±10%, 25 V)
173D105X9035VW (1 µF, ±10%, 35 V)
173D105X9050VW (1 µF, ±10%, 50 V)

Substitution logic is based strictly on the following allowed parameters: capacitance value, voltage rating (equal or higher), tolerance (equal or tighter), component type, mounting method, and package form factor.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Type	Mounting	Package	Size (Dia x L)	Status	Packaging Type
TAC105K020P01	Cornell Dubilier	1 µF	±10%	20 V	Molded Tantalum	Through Hole	Axial	0.095" x 0.260"	Obsolete	-
173D105X9020U	Vishay Sprague	1 µF	±10%	20 V	Molded Tantalum	Through Hole	Axial	0.095" x 0.260"	Active	Tape & Box
173D105X9020UW	Vishay Sprague	1 µF	±10%	20 V	Molded Tantalum	Through Hole	Axial	0.095" x 0.260"	Active	Tape & Reel
T322A105K020AS	KEMET	1 µF	±10%	20 V	Molded Tantalum	Through Hole	Axial	0.095" x 0.260"	Active	Bulk
173D105X5020UW	Vishay Sprague	1 µF	±5%	20 V	Molded Tantalum	Through Hole	Axial	0.095" x 0.260"	Active	Tape & Reel
173D105X5025UW	Vishay Sprague	1 µF	±5%	25 V	Molded Tantalum	Through Hole	Axial	0.095" x 0.260"	Active	Tape & Reel
173D105X5035V	Vishay Sprague	1 µF	±5%	35 V	Molded Tantalum	Through Hole	Axial	0.110" x 0.290"	Active	Tape & Box
173D105X5050VW	Vishay Sprague	1 µF	±5%	50 V	Molded Tantalum	Through Hole	Axial	0.110" x 0.290"	Active	Tape & Reel
173D105X9025UW	Vishay Sprague	1 µF	±10%	25 V	Molded Tantalum	Through Hole	Axial	0.095" x 0.260"	Active	Tape & Reel
173D105X9035VW	Vishay Sprague	1 µF	±10%	35 V	Molded Tantalum	Through Hole	Axial	0.110" x 0.290"	Active	Tape & Reel
173D105X9050VW	Vishay Sprague	1 µF	±10%	50 V	Molded Tantalum	Through Hole	Axial	0.110" x 0.290"	Active	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

Select from the direct equivalent group when the original TAC105K020P01 specifications are required and board layout constraints are fixed:

173D105X9020UW is the primary recommendation for new production orders due to active product status, established supply chain, and Tape & Reel packaging suitable for automated assembly.
173D105X9020U provides equivalent electrical performance with Tape & Box packaging for lower-volume applications.
T322A105K020AS offers an alternative from KEMET with identical specifications and Bulk packaging for manual assembly or repair applications.

All three direct equivalents are active products with established manufacturing processes and regulatory compliance documentation.

For Enhanced Performance (Upgrade Substitutes)

Select upgrade substitutes when design margins can accommodate improved specifications:

173D105X5020UW provides tighter ±5% tolerance at the original 20 V rating, suitable for applications requiring improved capacitance accuracy without physical size changes.
173D105X5025UW, 173D105X9025UW offer 25 V rating with identical physical dimensions, providing 25% voltage margin improvement.
173D105X5035V, 173D105X9035VW, 173D105X9050VW provide higher voltage ratings (35 V or 50 V) with larger physical dimensions (0.110" Dia x 0.290" L), suitable for applications with elevated voltage stress or thermal requirements.

All upgrade substitutes maintain the 1 µF capacitance value and through-hole axial configuration required for direct PCB compatibility.

Regulatory and Compliance Considerations

All substitute parts listed maintain RoHS non-compliant status consistent with the original TAC105K020P01. REACH Unaffected status is maintained across all substitutes. ECCN classification remains EAR99 for all parts. Applications requiring RoHS compliance require alternative component selection outside this substitution group.

Frequently Asked Questions (FAQ)

Q: Can 173D105X9020UW be used as a direct replacement for TAC105K020P01 in existing designs?

A: Yes. The 173D105X9020UW maintains identical electrical specifications (1 µF, ±10%, 20 V) and physical dimensions (0.095" Dia x 0.260" L). Both components are molded tantalum axial capacitors with through-hole mounting. No circuit modifications or PCB layout changes are required.

Q: What is the difference between direct equivalents and upgrade substitutes?

A: Direct equivalents (173D105X9020U, 173D105X9020UW, T322A105K020AS) match all specifications of the TAC105K020P01. Upgrade substitutes offer either tighter tolerance (±5% vs ±10%) or higher voltage ratings (25 V, 35 V, 50 V) while maintaining 1 µF capacitance. Upgrade substitutes with higher voltage ratings have larger physical dimensions and require PCB layout verification.

Q: Are there physical size differences between substitute parts?

A: Direct equivalents and lower-voltage upgrade substitutes (173D105X5020UW, 173D105X5025UW, 173D105X9025UW) maintain the original 0.095" Dia x 0.260" L dimensions. Higher-voltage upgrade substitutes (173D105X5035V, 173D105X5050VW, 173D105X9035VW, 173D105X9050VW) have larger dimensions of 0.110" Dia x 0.290" L and require PCB layout verification before implementation.

Q: What packaging options are available for substitute parts?

A: Direct equivalents are available in three packaging formats: Tape & Reel (173D105X9020UW, recommended for automated assembly), Tape & Box (173D105X9020U), and Bulk (T322A105K020AS). Upgrade substitutes are available in Tape & Reel or Tape & Box formats depending on voltage rating. Packaging selection depends on assembly method and order volume requirements.

Q: Can I use a 25 V or 35 V rated substitute in place of the 20 V TAC105K020P01?

A: Yes. Higher voltage-rated capacitors are electrically compatible with lower-voltage applications. The 173D105X9025UW (25 V) maintains original dimensions and provides 25% voltage margin. The 173D105X5035V and 173D105X9035VW (35 V) have larger physical dimensions and require PCB layout verification. Higher voltage ratings do not affect circuit operation in applications designed for 20 V.

Q: What is the difference between Vishay Sprague 173D series and KEMET T322 series substitutes?

A: Both manufacturers produce equivalent 1 µF, 20 V, ±10% molded tantalum axial capacitors with identical electrical performance and physical dimensions. The T322A105K020AS from KEMET specifies 10 Ohm ESR, while Vishay Sprague 173D series ESR is not specified in available data. Both are active products suitable for direct replacement.

Q: Why is the TAC105K020P01 listed as obsolete?

A: The TAC105K020P01 is no longer manufactured by Cornell Dubilier Electronics. Active production equivalents from Vishay Sprague (173D series) and KEMET (T322 series) provide identical functionality with current manufacturing support, established supply chains, and ongoing technical documentation.

Q: Are all substitute parts RoHS compliant?

A: No. All substitute parts listed maintain RoHS non-compliant status consistent with the original TAC105K020P01. Tantalum capacitor technology in this category does not meet RoHS requirements. Applications requiring RoHS compliance require alternative component selection.

Q: What is the inventory status of substitute parts?

A: All substitute parts listed are active products with current inventory availability: 173D105X9020U (771 Pcs), 173D105X9020UW (938 Pcs), T322A105K020AS (1161 Pcs), and upgrade substitutes ranging from 777 to 1134 Pcs. Inventory levels support both production and repair applications.

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