TAJB685K020SNJ Molded Tantalum Capacitor Equivalent & Substitute Parts

Part Overview

The TAJB685K020SNJ is a 6.8 µF molded tantalum capacitor rated at 20 V, manufactured by KYOCERA AVX in the TAJ series. This surface mount component is designed for general purpose applications requiring stable capacitance and low equivalent series resistance in compact form factors. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when inventory constraints, lead time requirements, or design flexibility necessitate alternative sourcing from equivalent manufacturers or series variants.

Substiute Parts

TAJB685K020SNJ

KYOCERA AVXIn Stock: 739TAJB685K020SNJ Datasheet

Current PartRFQ

F931D685KBA

KYOCERA AVXIn Stock: 3265F931D685KBA Datasheet

DirectRFQ

TAJB685K020RNJ

KYOCERA AVXIn Stock: 18693TAJB685K020RNJ Datasheet

DirectRFQ

TPSB685K020R0600

KYOCERA AVXIn Stock: 2793TPSB685K020R0600 Datasheet

MFR RecommendedRFQ

293D685X9020B2TE3

Vishay SpragueIn Stock: 4743293D685X9020B2TE3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TAJB685K020SNJ is determined by strict equivalence across the following parameters: capacitance value (6.8 µF), tolerance (±10%), voltage rating (20 V), package type (1411/3528 Metric), mounting method (surface mount), and operating temperature range (-55°C to 125°C). All identified substitutes maintain these core electrical and mechanical specifications. Variations in equivalent series resistance (ESR), seated height, and manufacturer series designation do not preclude substitution when the primary functional parameters remain identical. All substitute parts carry ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard assembly and storage protocols.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, confirming ongoing manufacturer support and regulatory alignment with current environmental standards. The TAJB685K020RNJ and TAJB685K020SNJ are functionally identical within the TAJ series, differing only in packaging designation. The F931D685KBA variant from the F93 series introduces a marginal height increase (0.091" vs. 0.083") and specifies ESR measurement at 100 kHz; this part remains electrically equivalent for general purpose applications. The TPSB685K020R0600 from the TPS series offers reduced ESR (600 mOhm) compared to the 2.5 Ohm baseline, providing enhanced performance in applications sensitive to impedance characteristics. The 293D685X9020B2TE3 from Vishay Sprague's TANTAMOUNT™ 293D series provides cross-manufacturer equivalence with identical electrical specifications and minimal height variance (0.083" vs. 0.0211"). Selection among these substitutes depends on availability, lead time, and application-specific ESR requirements rather than functional incompatibility.

Frequently Asked Questions (FAQ)

Q: Can TAJB685K020RNJ be used as a direct replacement for TAJB685K020SNJ? A: Yes. Both parts are from the KYOCERA AVX TAJ series with identical capacitance (6.8 µF), voltage rating (20 V), tolerance (±10%), package (1411/3528 Metric), ESR (2.5 Ohm), and seated height (0.083"). They are functionally interchangeable.

Q: What is the significance of the ESR difference in TPSB685K020R0600? A: The TPSB685K020R0600 specifies 600 mOhm ESR compared to 2.5 Ohm in other variants. This lower impedance may benefit applications with stringent ripple current or transient response requirements, but does not affect basic substitution eligibility for general purpose circuits.

Q: Does the height difference in F931D685KBA affect PCB compatibility? A: The F931D685KBA has a maximum seated height of 0.091" (2.30mm) versus 0.083" (2.10mm) for other variants. This 0.008" (0.20mm) increase must be verified against PCB clearance constraints and component placement density before selection.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All identified substitutes carry ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, ensuring compatibility with standard assembly, storage, and handling protocols.

Q: Can Vishay Sprague 293D685X9020B2TE3 replace KYOCERA AVX parts? A: Yes. The 293D685X9020B2TE3 maintains identical electrical specifications (6.8 µF, ±10%, 20 V, 2.5 Ohm, 1411 package) and active product status. Cross-manufacturer substitution is valid for general purpose applications.

Q: What inventory considerations apply to these substitutes? A: TAJB685K020RNJ offers the highest available inventory (18,643 pcs), followed by 293D685X9020B2TE3 (4,691 pcs), F931D685KBA (3,223 pcs), and TPSB685K020R0600 (2,771 pcs). Selection may be influenced by lead time and volume requirements.