TARS475K025 Equivalent & Substitute Parts

Part Overview

The TARS475K025 is a 4.7 µF molded tantalum capacitor rated at 25 V with ±10% tolerance, manufactured by KYOCERA AVX in axial through-hole configuration. This part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design support and procurement. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer enhanced performance characteristics or improved compliance status.

Substiute Parts

TARS475K025

KYOCERA AVXIn Stock: 731TARS475K025 Datasheet

Current PartRFQ

173D475X9025W

Vishay SpragueIn Stock: 1194173D475X9025W Datasheet

DirectRFQ

173D475X9025WW

Vishay SpragueIn Stock: 886173D475X9025WW Datasheet

DirectRFQ

T322C475K025AS

KEMETIn Stock: 789T322C475K025AS Datasheet

DirectRFQ

173D475X5035WW

Vishay SpragueIn Stock: 1191173D475X5035WW Datasheet

UpgradeRFQ

173D475X9035WW

Vishay SpragueIn Stock: 1197173D475X9035WW Datasheet

UpgradeRFQ

T322C475K035AS

KEMETIn Stock: 985T322C475K035AS Datasheet

UpgradeRFQ

173D475X9025WE3

Vishay SpragueIn Stock: 1149173D475X9025WE3 Datasheet

MFR RecommendedRFQ

173D475X9025WWE3

Vishay SpragueIn Stock: 814173D475X9025WWE3 Datasheet

MFR RecommendedRFQ

T322C475K025AT

KEMETIn Stock: 1144T322C475K025AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Direct Equivalents maintain all electrical parameters (4.7 µF, 25 V, ±10% tolerance) and mechanical compatibility (axial through-hole, similar dimensions). These parts are interchangeable without circuit modification.

Upgraded Substitutes increase voltage rating to 35 V while maintaining 4.7 µF capacitance and ±10% tolerance. These provide enhanced voltage margin and are mechanically compatible. Tolerance may be improved to ±5%.

Manufacturer-Recommended Alternatives offer RoHS3 compliance or improved ESR characteristics while maintaining core electrical specifications.

Substitution is restricted to parts with:

• Identical capacitance (4.7 µF)
• Equal or higher voltage rating (minimum 25 V)
• Equal or tighter tolerance (±10% or better)
• Axial through-hole mounting
• Compatible physical dimensions
• Operating temperature range of -55°C to 125°C

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (25 V, ±10% Tolerance):

Select from 173D475X9025W, 173D475X9025WW, or T322C475K025AS for immediate functional equivalence. All three maintain the original electrical specification of 4.7 µF at 25 V with ±10% tolerance and are in active production status. T322C475K025AS provides matching 4 Ohm ESR specification. Vishay Sprague parts are available in tape and reel packaging; KEMET part is supplied in bulk.

For RoHS3 Compliance Upgrade (25 V, ±10% Tolerance):

173D475X9025WE3, 173D475X9025WWE3, or T322C475K025AT provide ROHS3 compliance while maintaining identical electrical specifications. These are recommended for new designs or applications requiring regulatory compliance documentation.

For Enhanced Voltage Margin (35 V Rating):

173D475X5035WW (±5% tolerance) or 173D475X9035WW (±10% tolerance) or T322C475K035AS (±10% tolerance, 3 Ohm ESR) provide 40% higher voltage rating. These are suitable for applications requiring improved reliability margin or operating in elevated voltage environments. T322C475K035AS offers reduced ESR at 3 Ohm.

All substitute parts maintain the -55°C to 125°C operating temperature range and axial through-hole mounting configuration. Physical dimensions are consistent across all active alternatives at 0.180" Dia x 0.345" L.

Frequently Asked Questions (FAQ)

Q: Can I use a 35 V rated part in place of the original 25 V specification?

A: Yes. A 35 V rated capacitor is electrically compatible in a 25 V circuit. The higher voltage rating provides additional safety margin and does not affect circuit operation. Physical dimensions remain compatible with axial through-hole mounting.

Q: What is the difference between the Vishay Sprague 173D series and KEMET T322 series?

A: Both are molded tantalum axial capacitors with identical electrical ratings (4.7 µF, 25 V or 35 V, ±10% tolerance). KEMET T322 parts specify ESR values (4 Ohm at 25 V, 3 Ohm at 35 V); Vishay Sprague 173D parts do not list ESR in the provided specifications. Packaging differs: Vishay supplies tape and reel; KEMET supplies bulk.

Q: Are there dimensional differences between the original TARS475K025 and substitute parts?

A: Yes. The original TARS475K025 measures 0.169" Dia x 0.339" L. All active substitute parts measure 0.180" Dia x 0.345" L. These dimensional differences are within typical through-hole PCB tolerance and do not prevent mechanical substitution. Verify PCB layout clearance for the slightly larger diameter.

Q: What does the "WE3" or "AT" suffix indicate?

A: The "WE3" suffix on Vishay Sprague parts and "AT" suffix on KEMET parts indicate RoHS3 compliance. These variants meet current environmental regulations and are recommended for new designs or applications requiring compliance documentation.

Q: Can I mix packaging types (tape and reel vs. bulk) in production?

A: Tape and reel packaging is standard for automated assembly; bulk packaging is typical for manual assembly or small-volume applications. Electrical and mechanical specifications are identical. Verify your assembly process compatibility before selecting packaging type.

Q: What is the significance of ±5% versus ±10% tolerance?

A: ±5% tolerance (173D475X5035WW) provides tighter capacitance accuracy than ±10%. For applications sensitive to capacitance variation, the ±5% part offers improved performance consistency. Both tolerances are acceptable substitutes where the original specification allows ±10%.