TAC225K035P05 Equivalent & Substitute Parts

Part Overview

The TAC225K035P05 is a 2.2 µF molded tantalum capacitor rated at 35 V with ±10% tolerance, manufactured by Cornell Dubilier Electronics (CDE) in axial through-hole configuration. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement. The part operates across the temperature range of -55°C to 125°C and is suitable for general-purpose applications requiring stable capacitance in compact axial packages.

Key Parameters

Parameter	Value
Capacitance	2.2 µF
Tolerance	±10%
Voltage Rating	35 V
Type	Molded Tantalum
Mounting Type	Through Hole
Package / Case	Axial
Size / Dimension	0.180" Dia x 0.345" L (4.57mm x 8.76mm)
Operating Temperature	-55°C ~ 125°C
Features	General Purpose
RoHS Status	RoHS non-compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the TAC225K035P05 is determined by strict equivalence across the following critical parameters:

Direct Substitutes (Identical Electrical and Mechanical Specifications):

Capacitance: 2.2 µF (exact match required)
Tolerance: ±10% (exact match required)
Voltage Rating: 35 V (exact match required)
Package / Case: Axial (exact match required)
Size / Dimension: 0.180" Dia x 0.345" L (exact match required)
Operating Temperature: -55°C ~ 125°C (exact match required)
Mounting Type: Through Hole (exact match required)

Direct substitutes maintain identical electrical performance and physical form factor, enabling drop-in replacement without circuit redesign or PCB modification.

Upgrade Substitutes (Enhanced Voltage Rating):

Capacitance: 2.2 µF (exact match required)
Tolerance: ±10% (exact match required)
Voltage Rating: 50 V (higher rating acceptable for same application)
Package / Case: Axial (exact match required)
Size / Dimension: 0.180" Dia x 0.345" L (exact match required)
Operating Temperature: -55°C ~ 125°C (exact match required)
Mounting Type: Through Hole (exact match required)

Upgrade substitutes provide increased voltage margin while maintaining all other specifications. These parts are suitable for applications where the original 35 V rating is adequate, as the higher rating provides additional safety margin.

Similar Substitutes (Identical Specifications with Packaging Variation):

Capacitance: 2.2 µF (exact match required)
Tolerance: ±10% (exact match required)
Voltage Rating: 35 V (exact match required)
Package / Case: Axial (exact match required)
Size / Dimension: 0.180" Dia x 0.345" L (exact match required)
Operating Temperature: -55°C ~ 125°C (exact match required)
Mounting Type: Through Hole (exact match required)

Similar substitutes differ only in packaging format (Cut Tape vs. Tape & Reel vs. Bulk) and do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage	Type	Package	Size	Temp Range	Status	RoHS
TAC225K035P05	CDE	2.2 µF	±10%	35 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Obsolete	Non-compliant
173D225X9035W	Vishay Sprague	2.2 µF	±10%	35 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	Non-compliant
173D225X9035WW	Vishay Sprague	2.2 µF	±10%	35 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	Non-compliant
T322C225K035AS	KEMET	2.2 µF	±10%	35 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	Non-compliant
173D225X5050W	Vishay Sprague	2.2 µF	±5%	50 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	Non-compliant
173D225X9050WW	Vishay Sprague	2.2 µF	±10%	50 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	Non-compliant
173D225X9035WE3	Vishay Sprague	2.2 µF	±10%	35 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	ROHS3 Compliant
T322C225K035AT	KEMET	2.2 µF	±10%	35 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	ROHS3 Compliant
T322C225K050AS	KEMET	2.2 µF	±10%	50 V	Molded	Axial	0.180" x 0.345"	-55°C ~ 125°C	Active	Non-compliant

Engineering Selection Recommendations

For Direct Replacement (Same Electrical and Mechanical Specifications):

Select from the following active parts for direct substitution without circuit modification:

173D225X9035W (Vishay Sprague TANTALEX™ 173D series, Cut Tape packaging): Active product status with 1260 pcs inventory. Maintains all electrical and mechanical parameters of the obsolete TAC225K035P05. RoHS non-compliant status matches original specification.
173D225X9035WW (Vishay Sprague TANTALEX™ 173D series, Tape & Reel packaging): Active product status with 925 pcs inventory. Identical electrical specifications in reel format for automated assembly environments.
T322C225K035AS (KEMET T322 series, Bulk packaging): Active product status with 935 pcs inventory. Equivalent performance with 5Ohm ESR specification. RoHS non-compliant status matches original.
T322C225K035AT (KEMET T322 series, Bulk packaging): Active product status with 1013 pcs inventory. Equivalent performance with 5Ohm ESR specification. ROHS3 compliant, providing environmental compliance upgrade.

For Enhanced Voltage Margin (Upgrade Substitutes):

Select from the following parts when circuit design permits higher voltage rating:

173D225X5050W (Vishay Sprague TANTALEX™ 173D series, 50 V, ±5% tolerance): Active product status with 1126 pcs inventory. Provides 50 V rating with improved ±5% tolerance. Suitable for applications where voltage headroom is beneficial.
173D225X9050WW (Vishay Sprague TANTALEX™ 173D series, 50 V, ±10% tolerance): Active product status with 759 pcs inventory. Maintains ±10% tolerance with 50 V rating upgrade.
T322C225K050AS (KEMET T322 series, 50 V): Active product status with 1025 pcs inventory. Provides 50 V rating with 3.5Ohm ESR specification.

For RoHS3 Compliance:

Select from the following parts when environmental compliance is required:

173D225X9035WE3 (Vishay Sprague TANTALEX™ 173D series, Cut Tape): Active product status with 1264 pcs inventory. ROHS3 compliant with identical 35 V, 2.2 µF specifications.
T322C225K035AT (KEMET T322 series, Bulk): Active product status with 1013 pcs inventory. ROHS3 compliant with identical 35 V, 2.2 µF specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of the 35 V TAC225K035P05?

A: Yes. The 50 V rated substitutes (173D225X5050W, 173D225X9050WW, T322C225K050AS) are electrically compatible with circuits designed for 35 V operation. The higher voltage rating provides additional safety margin and does not degrade performance in the original application. All other parameters (capacitance, tolerance, temperature range, package) remain identical.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape and Tape & Reel packaging contain identical electrical components with different delivery formats. Cut Tape is supplied in smaller quantities on individual tape strips, suitable for manual assembly or small production runs. Tape & Reel is supplied on continuous reels for automated pick-and-place assembly equipment. Selection depends on assembly process requirements, not electrical performance.

Q: Are there RoHS3 compliant alternatives to the TAC225K035P05?

A: Yes. The 173D225X9035WE3 (Vishay Sprague) and T322C225K035AT (KEMET) are ROHS3 compliant alternatives with identical electrical specifications (2.2 µF, ±10%, 35 V). These parts are suitable for applications requiring environmental compliance certification.

Q: What does ESR (Equivalent Series Resistance) mean in tantalum capacitor specifications?

A: ESR is the internal resistance of the capacitor measured in ohms. Lower ESR values indicate better high-frequency performance and lower heat generation under AC ripple current conditions. The T322C225K035AS specifies 5Ohm ESR, while T322C225K050AS specifies 3.5Ohm ESR. Both values are acceptable for general-purpose applications; selection depends on specific circuit ripple current requirements.

Q: Can I substitute the TAC225K035P05 with a part having different tolerance?

A: Direct substitution requires matching tolerance. The TAC225K035P05 specifies ±10% tolerance. The 173D225X5050W offers ±5% tolerance (tighter tolerance), which is acceptable as a substitute if the circuit design permits. Parts with looser tolerance (greater than ±10%) are not suitable substitutes.

Q: What is the significance of the Manufacturer Size Code?

A: The Manufacturer Size Code (5 for CDE TAC series, W for Vishay 173D series, C for KEMET T322 series) is an internal manufacturer designation that does not affect electrical performance or physical dimensions. All parts listed maintain the identical physical size of 0.180" Dia x 0.345" L (4.57mm x 8.76mm).

Q: Are all listed substitutes suitable for -55°C to 125°C operation?

A: Yes. All substitute parts listed maintain the identical operating temperature range of -55°C to 125°C as the original TAC225K035P05. No thermal derating is required when substituting between these parts.

Q: What is REACH Unaffected status?

A: REACH Unaffected indicates that the component is not subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulatory restrictions. All parts listed carry this status, indicating no additional compliance documentation is required for REACH compliance.

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