TARS685M025 Equivalent & Substitute Parts

Part Overview

The TARS685M025 is a 6.8 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, making equivalent and substitute parts necessary for ongoing design support and procurement. The TAR series represents a legacy product line, and active alternatives from current manufacturers provide functional equivalence while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

TARS685M025

KYOCERA AVXIn Stock: 939TARS685M025 Datasheet

Current PartRFQ

173D685X0025W

Vishay SpragueIn Stock: 808173D685X0025W Datasheet

DirectRFQ

173D685X0025WW

Vishay SpragueIn Stock: 819173D685X0025WW Datasheet

DirectRFQ

173D685X9025WW

Vishay SpragueIn Stock: 1203173D685X9025WW Datasheet

UpgradeRFQ

T322C685K025AS

KEMETIn Stock: 760T322C685K025AS Datasheet

UpgradeRFQ

173D685X0025WE3

Vishay SpragueIn Stock: 802173D685X0025WE3 Datasheet

MFR RecommendedRFQ

173D685X0025WWE3

Vishay SpragueIn Stock: 766173D685X0025WWE3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TARS685M025 is determined by strict equivalence in the following parameters:

• Capacitance: 6.8 µF (exact match required)
• Voltage Rating: 25 V (exact match required)
• Mounting Type: Through Hole Axial (exact match required)
• Operating Temperature: -55°C to 125°C (exact match required)
• Type: Molded Tantalum (exact match required)

Substitute parts are grouped into two categories:

Direct Equivalents maintain the original ±20% tolerance specification and are pin-for-pin compatible replacements.

Upgrade Alternatives offer improved tolerance (±10%) while maintaining all other electrical and mechanical parameters, providing enhanced performance for applications requiring tighter capacitance control.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (±20% Tolerance, RoHS Non-Compliant)

173D685X0025W and 173D685X0025WW are direct functional replacements for the TARS685M025. Both parts maintain the original ±20% tolerance specification and are manufactured by Vishay Sprague as active products. These parts are suitable for applications where the original tolerance specification is acceptable and RoHS compliance is not required.

Direct Equivalents (±20% Tolerance, ROHS3 Compliant)

173D685X0025WE3 and 173D685X0025WWE3 provide the same electrical specifications as the original part with ROHS3 compliance. These variants are recommended for new designs or applications requiring RoHS compliance while maintaining the original ±20% tolerance.

Upgrade Alternatives (±10% Tolerance)

173D685X9025WW (Vishay Sprague) and T322C685K025AS (KEMET) offer improved tolerance at ±10%, providing tighter capacitance control. Both are active products suitable for applications requiring enhanced performance. T322C685K025AS additionally specifies 3.1 Ohm ESR, matching the original part's ESR characteristic.

Physical Compatibility Note

Substitute parts from Vishay Sprague and KEMET feature slightly larger dimensions (0.180" Dia × 0.345" L versus 0.169" Dia × 0.339" L). PCB layout verification is required to confirm mechanical fit in existing designs.

Frequently Asked Questions (FAQ)

Q: Can I use 173D685X0025WE3 or 173D685X0025WWE3 as direct replacements for TARS685M025?

A: Yes. These parts maintain identical electrical specifications (6.8 µF, 25 V, ±20% tolerance) and operating temperature range. The primary difference is ROHS3 compliance. Physical dimensions are slightly larger; verify PCB clearance.

Q: What is the difference between 173D685X0025WW and 173D685X9025WW?

A: Both are manufactured by Vishay Sprague with identical physical dimensions and operating temperature. The key difference is tolerance: 173D685X0025WW maintains ±20%, while 173D685X9025WW offers ±10% tolerance for applications requiring tighter capacitance control.

Q: Is T322C685K025AS compatible with the original TARS685M025?

A: Yes. T322C685K025AS is electrically equivalent with 6.8 µF capacitance, 25 V rating, and -55°C to 125°C operating range. It offers ±10% tolerance and specifies 3.1 Ohm ESR. Physical dimensions are slightly larger; verify PCB fit.

Q: Do all substitute parts have the same ESR specification?

A: No. The original TARS685M025 and T322C685K025AS both specify 3.1 Ohm ESR. Vishay Sprague parts (173D series) do not specify ESR in the provided data. For applications where ESR is critical, T322C685K025AS is the recommended choice.

Q: Are there RoHS compliance differences among the substitutes?

A: Yes. 173D685X0025WE3 and 173D685X0025WWE3 are ROHS3 compliant. All other substitutes, including the original TARS685M025, are RoHS non-compliant. Select ROHS3 variants for applications requiring RoHS compliance.

Q: What packaging options are available?

A: TARS685M025 is supplied in bulk packaging. Vishay Sprague substitutes (173D series) are supplied in Tape & Reel (TR). T322C685K025AS is supplied in bulk. Verify packaging requirements for your procurement process.

Q: Can I use these parts interchangeably in existing designs?

A: Electrical interchangeability is confirmed for all listed substitutes. Physical dimensions are slightly larger than the original; verify PCB layout clearance before implementation. Tolerance differences (±20% versus ±10%) may affect circuit performance in tolerance-sensitive applications.