TARS106M020 Equivalent & Substitute Parts

Part Overview

The TARS106M020 is a 10 µF molded tantalum capacitor rated at 20 V with ±20% tolerance, manufactured by KYOCERA AVX in axial through-hole configuration. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain the core electrical specifications: 10 µF capacitance, 20 V rated voltage, ±20% tolerance, axial through-hole mounting, and general-purpose tantalum construction.

Key Parameters

Parameter	Value
Capacitance	10 µF
Voltage Rating	20 V
Tolerance	±20%
Type	Molded Tantalum
Mounting Type	Through Hole
Package	Axial
Operating Temperature Range	-55°C to 125°C
ESR	2.8 Ohm (main part)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for TARS106M020 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Must Match):

Capacitance: 10 µF (exact)
Voltage Rating: 20 V (minimum)
Tolerance: ±20% (exact match) or tighter tolerance (±10%, ±5%)
Type: Molded Tantalum
Mounting: Through Hole Axial
Operating Temperature: -55°C to 125°C

Substitution Categories:

Direct Equivalents (20 V, ±20% tolerance): Parts with identical electrical specifications and active product status. These are pin-compatible replacements with no design modifications required.

Tolerance Upgrades (20 V, tighter tolerance): Parts with ±10% or ±5% tolerance at 20 V rating. These provide improved capacitance accuracy while maintaining the same voltage rating and are functionally superior for precision applications.

Voltage Upgrades (25 V rating): Parts rated at 25 V with 10 µF capacitance. These provide additional voltage margin and are backward-compatible for 20 V applications.

Compliance Variants: Parts with identical electrical specifications but different RoHS compliance status (ROHS3 compliant versions available).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR	Product Status	RoHS Status	Packaging
TARS106M020	KYOCERA AVX	10 µF	20 V	±20%	2.8 Ohm	Obsolete	Non-compliant	Bulk
173D106X0020W	Vishay Sprague	10 µF	20 V	±20%	—	Active	Non-compliant	Tape & Reel
173D106X0020WW	Vishay Sprague	10 µF	20 V	±20%	—	Active	Non-compliant	Tape & Reel
173D106X0025WW	Vishay Sprague	10 µF	25 V	±20%	—	Active	Non-compliant	Tape & Reel
173D106X5020W	Vishay Sprague	10 µF	20 V	±5%	—	Active	Non-compliant	Tape & Reel
173D106X9020WW	Vishay Sprague	10 µF	20 V	±10%	—	Active	Non-compliant	Tape & Reel
173D106X9025WW	Vishay Sprague	10 µF	25 V	±10%	—	Active	Non-compliant	Tape & Reel
T322C106K020AS	KEMET	10 µF	20 V	±10%	2.9 Ohm	Active	Non-compliant	Bulk
173D106X0020WE3	Vishay Sprague	10 µF	20 V	±20%	—	Active	ROHS3 Compliant	Tape & Reel
173D106X0020WWE3	Vishay Sprague	10 µF	20 V	±20%	—	Active	ROHS3 Compliant	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): 173D106X0020W, 173D106X0020WW, 173D106X0020WE3, and 173D106X0020WWE3 are direct electrical equivalents to TARS106M020. All are active products from Vishay Sprague TANTALEX™ 173D series. The WE3 and WWE3 variants offer ROHS3 compliance for applications requiring environmental compliance. Selection between these variants depends on packaging requirements (Tape & Reel vs. Bulk) and compliance mandates.

For Improved Tolerance Performance: 173D106X5020W (±5% tolerance) and 173D106X9020WW (±10% tolerance) provide tighter capacitance accuracy at the same 20 V rating. These are suitable for applications requiring improved tolerance performance without voltage derating.

For Voltage Margin Enhancement: 173D106X0025WW and 173D106X9025WW are rated at 25 V and provide additional voltage headroom for 20 V applications. These are backward-compatible and suitable for designs requiring enhanced reliability margins.

For Bulk Packaging: T322C106K020AS from KEMET provides a bulk packaging alternative with ±10% tolerance and comparable ESR (2.9 Ohm vs. 2.8 Ohm original specification). This part is suitable for high-volume production environments.

For RoHS3 Compliance: 173D106X0020WE3 and 173D106X0020WWE3 are the only ROHS3-compliant direct equivalents and are recommended for applications subject to environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can I use a 25 V rated capacitor in place of a 20 V rated capacitor? A: Yes. The 25 V rated variants (173D106X0025WW, 173D106X9025WW) are backward-compatible with 20 V applications. Higher voltage ratings provide additional safety margin and are functionally equivalent for circuits designed for 20 V operation.

Q: What is the difference between ±20%, ±10%, and ±5% tolerance variants? A: Tolerance specifies the allowable deviation from the nominal 10 µF capacitance value. ±20% allows 8–12 µF, ±10% allows 9–11 µF, and ±5% allows 9.5–10.5 µF. Tighter tolerances are suitable for precision applications; ±20% is acceptable for general-purpose filtering.

Q: Are Tape & Reel and Bulk packaging interchangeable? A: Tape & Reel packaging is standard for automated assembly lines, while Bulk packaging is used for manual assembly or lower-volume production. The electrical specifications are identical; packaging selection depends on manufacturing process requirements.

Q: Why are some parts marked as ROHS3 compliant and others not? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements. The WE3 and WWE3 variants (173D106X0020WE3, 173D106X0020WWE3) are ROHS3 compliant; non-compliant variants may be restricted in certain markets or applications.

Q: What does ESR (Equivalent Series Resistance) mean? A: ESR is the internal resistance of the capacitor at operating frequency. Lower ESR values (2.8–2.9 Ohm for these parts) indicate better high-frequency performance and lower heat generation. ESR values are not specified for most Vishay 173D variants but are comparable to the original TARS106M020.

Q: Can I substitute TARS106M020 with a different capacitance value? A: No. Capacitance is a primary electrical parameter and must remain 10 µF. Substitution is limited to parts with identical or upgraded electrical specifications (voltage, tolerance) and compatible mechanical form factors.

Q: Which substitute offers the best overall compatibility? A: 173D106X0020WW and 173D106X0020W provide direct electrical equivalence with active product status and standard Tape & Reel packaging. For compliance-critical applications, 173D106X0020WWE3 is the recommended choice due to ROHS3 compliance.

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