TAJB685K010A Equivalent & Substitute Parts

Part Overview

The TAJB685K010A is a 6.8 µF molded tantalum capacitor rated at 10 V, manufactured by KYOCERA AVX in the TAJ series. This component is classified as Active and is designed for general-purpose surface mount applications in the 1411 (3528 Metric) package format. Tantalum capacitors of this specification are essential in power supply filtering, signal coupling, and decoupling circuits where compact form factors and stable capacitance values are required. Alternative equivalent parts may be necessary due to inventory availability, lead time constraints, or specific packaging requirements.

Substiute Parts

TAJB685K010A

KYOCERA AVXIn Stock: 1042TAJB685K010A Datasheet

Current PartRFQ

TAJB685K010RNJ

KYOCERA AVXIn Stock: 13911TAJB685K010RNJ Datasheet

DirectRFQ

293D685X9010B2TE3

Vishay SpragueIn Stock: 3821293D685X9010B2TE3 Datasheet

DirectRFQ

T491B685K010AT

KEMETIn Stock: 53389T491B685K010AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TAJB685K010A is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 6.8 µF (exact match required)
• Voltage Rating: 10 V (exact match required)
• Package / Case: 1411 (3528 Metric) (exact match required)
• Physical Dimensions: 0.138" L x 0.110" W, Height ≤ 0.083" (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Tolerance: ±10% (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The following parts meet all substitution criteria and are electrically and mechanically interchangeable with the TAJB685K010A:

1. TAJB685K010RNJ (KYOCERA AVX) — Same manufacturer, TAJ series, Tape & Reel packaging
2. 293D685X9010B2TE3 (Vishay Sprague) — TANTAMOUNT™ 293D series, Tape & Reel packaging
3. T491B685K010AT (KEMET) — T491 series, Tape & Reel packaging

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts are Active products with ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component procurement.

TAJB685K010RNJ is the direct equivalent from the same manufacturer (KYOCERA AVX) and TAJ series. The primary distinction is packaging format: the original part number indicates bulk packaging, while TAJB685K010RNJ is supplied in Tape & Reel format. This part is recommended when maintaining manufacturer consistency is a priority.

293D685X9010B2TE3 from Vishay Sprague offers the lowest ESR at 2.9 Ohm compared to the original 3 Ohm specification. This characteristic may provide marginal performance benefits in applications sensitive to impedance characteristics, though all parts remain within acceptable operating parameters for general-purpose applications.

T491B685K010AT from KEMET is the manufacturer-recommended alternative. It carries a specified lifetime rating of 2000 hours at 125°C, providing documented reliability data. The ESR is 4.6 Ohm, which remains within acceptable tolerance for this component class.

All three substitutes maintain identical electrical specifications (capacitance, voltage, tolerance, temperature range) and physical dimensions, ensuring direct board-level compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can TAJB685K010RNJ be used as a direct replacement for TAJB685K010A?

A: Yes. Both parts are manufactured by KYOCERA AVX in the TAJ series with identical electrical and mechanical specifications. The difference is packaging format: TAJB685K010RNJ is supplied in Tape & Reel format, while TAJB685K010A indicates bulk packaging. Board-level performance is identical.

Q: What is the significance of ESR differences among the substitute parts?

A: ESR (Equivalent Series Resistance) values are 3 Ohm (TAJB685K010A and TAJB685K010RNJ), 2.9 Ohm (293D685X9010B2TE3), and 4.6 Ohm (T491B685K010AT). These minor variations fall within the normal manufacturing tolerance band for molded tantalum capacitors and do not affect compatibility in general-purpose applications. Applications with strict impedance requirements should evaluate ESR specifications against circuit design parameters.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four parts (original and three substitutes) are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory standards for electronic component procurement.

Q: What is the difference between the 1411 and 1210 package designations listed for TAJB685K010A?

A: Both designations refer to the same physical package. 1411 is the EIA code, and 1210 is the metric equivalent (3528 Metric). The physical dimensions remain 0.138" L x 0.110" W (4.60mm x 2.80mm).

Q: Can these parts be used interchangeably on the same PCB assembly line?

A: Yes, provided the assembly process accommodates Tape & Reel packaging for the substitute parts. All parts share identical footprints, dimensions, and mounting requirements for surface mount assembly.

Q: Which substitute part should be selected for maximum inventory availability?

A: T491B685K010AT from KEMET has the highest reported inventory at 53,300 pieces. TAJB685K010RNJ from KYOCERA AVX has 13,853 pieces available. 293D685X9010B2TE3 from Vishay Sprague has 3,751 pieces available.