TARS106M025 Equivalent & Substitute Parts

Part Overview

The TARS106M025 is a 10 µF molded tantalum capacitor rated at 25 V with ±20% tolerance, manufactured by KYOCERA AVX in axial through-hole configuration. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing production and repair applications. Vishay Sprague TANTALEX™ 173D series capacitors provide direct functional equivalents with improved availability and compliance options.

Key Parameters

Parameter	Value	Significance for Substitution
Capacitance	10 µF	Must match exactly
Voltage Rating	25 V	Must match or exceed
Tolerance	±20% / ±10%	Determines circuit compatibility
Type	Molded Tantalum	Must match technology
Mounting Type	Through Hole Axial	Must match PCB footprint
Operating Temperature	-55°C to 125°C	Must support application range
Package / Case	Axial	Must match mechanical form factor
ESR	2.5 Ohm (main part)	Electrical performance parameter

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

Capacitance: All substitutes maintain 10 µF
Voltage Rating: All substitutes maintain 25 V
Mounting Type: All substitutes are through-hole axial configuration
Operating Temperature Range: All substitutes support -55°C to 125°C
Type: All substitutes are molded tantalum technology

Tolerance Variants: The substitute list includes both ±20% tolerance parts (direct equivalents) and ±10% tolerance parts (upgrades with tighter tolerance). ±10% tolerance parts are backward-compatible with ±20% specifications.

Compliance Variants: Substitute parts are available in both standard (RoHS non-compliant) and ROHS3-compliant versions, identified by the "E3" suffix designation.

Physical Dimensions: Vishay Sprague 173D series parts measure 0.180" Dia × 0.345" L (4.57mm × 8.76mm), compared to the original 0.169" Dia × 0.339" L (4.30mm × 8.60mm). Dimensional variation is within typical through-hole axial component tolerances.

Parameter Comparison

Parameter	TARS106M025 (KYOCERA AVX)	173D106X0025W	173D106X0025WW	173D106X9025WW	173D106X0025WE3	173D106X0025WWE3
Manufacturer	KYOCERA AVX	Vishay Sprague	Vishay Sprague	Vishay Sprague	Vishay Sprague	Vishay Sprague
Series	TAR	TANTALEX™ 173D	TANTALEX™ 173D	TANTALEX™ 173D	TANTALEX™ 173D	TANTALEX™ 173D
Capacitance	10 µF	10 µF	10 µF	10 µF	10 µF	10 µF
Tolerance	±20%	±20%	±20%	±10%	±20%	±20%
Voltage Rating	25 V	25 V	25 V	25 V	25 V	25 V
Type	Molded	Molded	Molded	Molded	Molded	Molded
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Axial	Axial	Axial	Axial	Axial	Axial
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	Non-compliant	Non-compliant	Non-compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	935 Pcs	789 Pcs	703 Pcs	1051 Pcs	722 Pcs	911 Pcs

Engineering Selection Recommendations

For Standard Applications (RoHS Non-Compliant Acceptable)

173D106X0025W and 173D106X0025WW are direct functional equivalents to TARS106M025, maintaining identical electrical specifications with ±20% tolerance. Both parts are active products with established supply chains. Selection between these two variants depends on packaging requirements (Tape & Reel format).

For Tighter Tolerance Requirements

173D106X9025WW provides ±10% tolerance, suitable for applications requiring improved capacitance accuracy. This part is backward-compatible with ±20% specifications and offers the highest current inventory (1051 pcs).

For ROHS3 Compliance

173D106X0025WE3 and 173D106X0025WWE3 are ROHS3-compliant variants maintaining ±20% tolerance and identical electrical performance. These parts satisfy regulatory requirements for restricted substance compliance while preserving functional equivalence to the original TARS106M025.

Upgrade Path

173D106X9025WE3 and 173D106X9025WWE3 combine both ±10% tolerance and ROHS3 compliance, representing the most advanced specification option within the substitute family.

Frequently Asked Questions (FAQ)

Q: Can 173D106X9025WW (±10% tolerance) replace TARS106M025 (±20% tolerance)?

A: Yes. The ±10% tolerance specification is a tighter tolerance that encompasses the ±20% tolerance range. Any circuit designed for ±20% tolerance will function correctly with a ±10% component.

Q: What is the physical dimension difference between TARS106M025 and 173D series substitutes?

A: TARS106M025 measures 0.169" Dia × 0.339" L (4.30mm × 8.60mm). Vishay 173D series measures 0.180" Dia × 0.345" L (4.57mm × 8.76mm). The difference is approximately 0.011" in diameter and 0.006" in length, within standard through-hole component tolerances and typical PCB design margins.

Q: Are ROHS3-compliant variants (E3 suffix) electrically identical to non-compliant versions?

A: Yes. The E3 designation indicates compliance certification only. Electrical specifications, capacitance, voltage rating, tolerance, and operating temperature range are identical between compliant and non-compliant variants.

Q: Which substitute part has the best availability?

A: 173D106X9025WW has the highest inventory at 1051 pcs. This part also provides the advantage of ±10% tolerance.

Q: Can I use 173D106X0025WE3 in a design that originally specified TARS106M025?

A: Yes. 173D106X0025WE3 maintains all critical electrical parameters (10 µF, 25 V, ±20% tolerance, -55°C to 125°C operating range) and physical form factor (through-hole axial). The E3 designation adds ROHS3 compliance without changing functional performance.

Q: What is the difference between 173D106X0025W and 173D106X0025WW?

A: Both parts are electrically and mechanically identical. The difference is packaging format: 173D106X0025W is supplied in Tape & Reel format, while 173D106X0025WW is also Tape & Reel. Consult packaging specifications for specific reel configurations and quantities per reel.

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