TAC474K035P01 Equivalent & Substitute Parts Reference

Part Overview

The TAC474K035P01 is a 0.47 µF molded tantalum axial capacitor rated at 35 V with ±10% tolerance, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making direct replacement necessary for new designs and production continuity. The part operates across the temperature range of -55°C to 125°C and is designed for general-purpose applications in through-hole configurations. Due to its obsolete status, equivalent substitutes from active manufacturers are required to maintain supply chain reliability and ensure long-term component availability.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	0.47 µF	Must match exactly for direct equivalence
Voltage Rating	35 V	Minimum acceptable rating; higher ratings permitted
Tolerance	±10%	Tolerance class; tighter tolerances acceptable
Type	Molded Tantalum	Defines dielectric material and construction
Mounting Type	Through Hole	Axial lead configuration required
Package / Case	Axial	Physical form factor for PCB insertion
Operating Temperature	-55°C to 125°C	Must support full temperature range
Size / Dimension	0.095" Dia x 0.260" L (2.41mm x 6.60mm)	Physical fit on PCB; larger sizes acceptable if space permits

Substitute Part Grouping Explanation

Substitution logic for the TAC474K035P01 is based on the following criteria:

Direct Equivalents (Same Specifications): Parts matching all key parameters—0.47 µF capacitance, 35 V voltage rating, ±10% tolerance, molded tantalum construction, axial through-hole mounting, and -55°C to 125°C operating temperature—are classified as direct substitutes. These parts maintain identical electrical performance and physical compatibility.

Tolerance Upgrades: Parts with ±5% tolerance instead of ±10% provide improved capacitance accuracy while maintaining all other specifications. These are functionally superior and directly interchangeable.

Voltage Upgrades: Parts rated at 50 V instead of 35 V provide increased voltage margin and are electrically compatible. Higher voltage ratings do not degrade performance in 35 V applications.

Combined Upgrades: Parts combining both tighter tolerance (±5%) and higher voltage rating (50 V) offer enhanced performance characteristics while remaining mechanically and electrically compatible.

Compliance Variants: Parts with identical electrical and mechanical specifications but different RoHS compliance status (ROHS3 Compliant vs. RoHS non-compliant) are functionally equivalent; selection depends on regulatory requirements.

Packaging Variants: Identical electrical specifications with different packaging formats (Tape & Box, Tape & Reel, Bulk) are interchangeable; packaging selection depends on procurement and assembly requirements.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Size (Dia x L)	Packaging	Product Status	RoHS Status
TAC474K035P01	Cornell Dubilier Electronics	0.47 µF	35 V	±10%	0.095" x 0.260"	-	Obsolete	Non-compliant
173D474X9035U	Vishay Sprague	0.47 µF	35 V	±10%	0.095" x 0.260"	Tape & Box	Active	Non-compliant
173D474X9035UW	Vishay Sprague	0.47 µF	35 V	±10%	0.095" x 0.260"	Tape & Reel	Active	Non-compliant
T322A474K035AS	KEMET	0.47 µF	35 V	±10%	0.095" x 0.260"	Bulk	Active	Non-compliant
173D474X5035U	Vishay Sprague	0.47 µF	35 V	±5%	0.095" x 0.260"	Tape & Box	Active	Non-compliant
173D474X5050V	Vishay Sprague	0.47 µF	50 V	±5%	0.110" x 0.290"	Tape & Box	Active	Non-compliant
173D474X9050VW	Vishay Sprague	0.47 µF	50 V	±10%	0.110" x 0.290"	Tape & Reel	Active	Non-compliant
T322B474K050AS	KEMET	0.47 µF	50 V	±10%	0.110" x 0.290"	Bulk	Active	Non-compliant
173D474X9035UE3	Vishay Sprague	0.47 µF	35 V	±10%	0.095" x 0.260"	Tape & Box	Active	ROHS3 Compliant
T322A474K035AT	KEMET	0.47 µF	35 V	±10%	0.095" x 0.260"	Bulk	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): Select 173D474X9035U, 173D474X9035UW, or T322A474K035AS. These parts maintain exact electrical and mechanical compatibility with the TAC474K035P01. All three are manufactured by active suppliers (Vishay Sprague and KEMET), ensuring long-term availability. Selection among these three depends on packaging requirements: Tape & Box for standard procurement, Tape & Reel for automated assembly, or Bulk for high-volume applications.

For Improved Compliance: Select 173D474X9035UE3 or T322A474K035AT for applications requiring ROHS3 compliance. These parts are electrically and mechanically identical to the direct replacements but meet current environmental regulations. Both are from active manufacturers with confirmed inventory.

For Enhanced Performance (Tolerance Upgrade): Select 173D474X5035U when tighter capacitance tolerance (±5%) is beneficial. This part maintains the 35 V rating and identical physical dimensions while providing improved accuracy. Suitable for precision applications where capacitance variation must be minimized.

For Voltage Margin Enhancement: Select 173D474X9050VW or T322B474K050AS when higher voltage rating (50 V) is required for design margin or application requirements. These parts increase the voltage safety factor while maintaining ±10% tolerance. Note: Physical dimensions increase to 0.110" Dia x 0.290" L; verify PCB layout compatibility before selection.

For Combined Upgrades (Tolerance + Voltage): Select 173D474X5050V for applications requiring both ±5% tolerance and 50 V rating. This part provides maximum performance enhancement with increased physical size (0.110" Dia x 0.290" L).

Product Status Consideration: All recommended substitutes are classified as Active, ensuring continued manufacturing and supply availability. The obsolete status of TAC474K035P01 makes transition to an active equivalent necessary for production continuity.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of a 35 V rated capacitor? A: Yes. Higher voltage ratings are electrically compatible with lower voltage applications. A 50 V capacitor operates safely in a 35 V circuit and provides additional voltage margin. Physical dimensions may increase; verify PCB layout compatibility.

Q: What is the difference between ±10% and ±5% tolerance? A: Tolerance defines the acceptable range of capacitance variation from the nominal value. ±10% allows ±0.047 µF variation (0.423–0.517 µF range), while ±5% allows ±0.0235 µF variation (0.4465–0.4935 µF range). Tighter tolerance (±5%) provides improved accuracy and is suitable for precision applications.

Q: Are Tape & Box, Tape & Reel, and Bulk packaging electrically equivalent? A: Yes. Packaging format affects procurement and assembly logistics only. Electrical and mechanical specifications remain identical. Tape & Reel is optimized for automated pick-and-place assembly; Tape & Box for standard procurement; Bulk for high-volume manual assembly.

Q: What does ROHS3 Compliant mean? A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting specific hazardous materials. Selection depends on regulatory requirements for your application region or customer specifications.

Q: Can I substitute 173D474X9035UE3 for TAC474K035P01 directly? A: Yes. The 173D474X9035UE3 is electrically and mechanically identical to TAC474K035P01 with the added benefit of ROHS3 compliance. It is a direct substitute with improved regulatory status.

Q: What is ESR (Equivalent Series Resistance)? A: ESR represents the internal resistance of the capacitor at operating frequency. The provided data does not specify ESR values for most parts; where specified (KEMET T322 series: 13 Ohm), this parameter is provided for reference. ESR affects high-frequency performance and ripple current handling.

Q: Are all substitute parts available in the same physical size? A: No. Parts rated at 50 V (173D474X5050V, 173D474X9050VW, T322B474K050AS) have larger dimensions (0.110" Dia x 0.290" L) compared to 35 V parts (0.095" Dia x 0.260" L). Verify PCB layout and mounting hole spacing before selecting 50 V alternatives.

Q: Which substitute offers the best long-term availability? A: All recommended substitutes are from active manufacturers (Vishay Sprague and KEMET) with confirmed inventory. Vishay Sprague TANTALEX™ series (173D) and KEMET T322 series are established product lines with stable production. Both manufacturers provide equivalent long-term availability.

Q: Can I mix different manufacturers' parts in the same circuit? A: Yes. All recommended substitutes meet identical electrical and mechanical specifications. Mixing manufacturers (Vishay Sprague and KEMET) in the same application is acceptable from an engineering standpoint. Verify procurement and quality assurance procedures with your supplier.

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