KEMET T322E686K015AS Equivalent & Substitute Parts

Part Overview

The KEMET T322E686K015AS is a 68 µF molded tantalum capacitor rated for 15 V operation in axial through-hole configuration. This component is classified as Active product status and serves general-purpose applications requiring stable capacitance in compact form factors. Substitute parts are identified to address inventory availability, compliance requirements, or performance optimization within the specified electrical and mechanical parameter ranges.

Substiute Parts

T322E686K015AS

KEMETIn Stock: 1073T322E686K015AS Datasheet

Current PartRFQ

T322E686K015AT

KEMETIn Stock: 703T322E686K015AT Datasheet

DirectRFQ

T322E686K020AS

KEMETIn Stock: 818T322E686K020AS Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the T322E686K015AS are classified into two categories based on allowed parameter variations:

Direct Equivalent (Same Electrical Specifications): The T322E686K015AT maintains identical electrical parameters: 68 µF capacitance, ±10% tolerance, 15 V rating, 1 Ohm ESR, and -55°C to 125°C operating range. This part differs only in RoHS compliance status (ROHS3 Compliant versus RoHS non-compliant) and HTSUS classification. Physical dimensions and mounting type remain unchanged.

Upgraded Specification (Higher Voltage Rating): The T322E686K020AS provides the same 68 µF capacitance and ±10% tolerance but with elevated 20 V voltage rating and reduced ESR of 900 mOhm. This part is suitable for applications requiring higher voltage margin or improved transient response characteristics. Physical dimensions and mounting configuration remain identical.

Key Parameters Determining Substitution:

• Capacitance value (68 µF fixed)
• Tolerance (±10% fixed)
• Mounting type (Through Hole Axial fixed)
• Package dimensions (0.280" Dia × 0.530" L fixed)
• Voltage rating (15 V minimum; 20 V acceptable as upgrade)
• Operating temperature range (-55°C to 125°C fixed)

Parameter Comparison

Engineering Selection Recommendations

T322E686K015AT Selection Criteria: Select this direct equivalent when RoHS3 compliance is required for the application or end-market. Electrical performance is identical to the main part. This substitute is appropriate for designs subject to RoHS Directive 2011/65/EU requirements. Inventory availability is 670 units.

T322E686K020AS Selection Criteria: Select this upgraded specification when the circuit design permits higher voltage rating or when improved ESR performance (900 mOhm versus 1 Ohm) is beneficial for transient response. The 20 V rating provides additional voltage margin in applications operating near the 15 V nominal level. This part maintains identical physical dimensions and mounting configuration. Inventory availability is 797 units.

Main Part T322E686K015AS Retention: Retain the original specification when RoHS non-compliance is acceptable and when the 1 Ohm ESR specification is explicitly required by circuit design. Highest inventory availability at 1033 units supports production continuity.

Frequently Asked Questions (FAQ)

Q: Can T322E686K015AT be used as a direct replacement for T322E686K015AS? A: Yes. Both parts share identical electrical specifications: 68 µF capacitance, ±10% tolerance, 15 V rating, 1 Ohm ESR, and -55°C to 125°C operating range. The primary difference is RoHS3 compliance status. Physical dimensions and mounting type are identical, enabling direct PCB substitution.

Q: What is the advantage of using T322E686K020AS instead of the original part? A: The T322E686K020AS provides two technical advantages: (1) elevated 20 V voltage rating, offering additional safety margin in circuits operating near 15 V nominal levels, and (2) reduced ESR of 900 mOhm compared to 1 Ohm, improving transient response characteristics. Physical form factor remains unchanged.

Q: Are all three parts physically interchangeable on the PCB? A: Yes. All three parts maintain identical package dimensions of 0.280" diameter by 0.530" length and use through-hole axial mounting configuration. No PCB layout modifications are required for substitution.

Q: Does the voltage rating difference affect circuit compatibility? A: The T322E686K020AS operates at higher voltage rating (20 V) compared to the main part and T322E686K015AT (15 V). In circuits designed for 15 V operation, the higher-rated part is fully compatible and provides additional voltage margin. The capacitance value and tolerance remain constant across all three parts.

Q: What compliance considerations apply to part selection? A: The T322E686K015AT is ROHS3 Compliant, while T322E686K015AS and T322E686K020AS are RoHS non-compliant. Select T322E686K015AT for applications subject to RoHS Directive 2011/65/EU requirements. All three parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: How does ESR difference impact circuit performance? A: The T322E686K020AS features 900 mOhm ESR compared to 1 Ohm in the other two parts. Lower ESR reduces impedance at high frequencies and improves transient response. This difference is significant in high-frequency filtering or decoupling applications but may be negligible in general-purpose low-frequency circuits.