TACR685K006R Equivalent & Substitute Parts

Part Overview

The TACR685K006R is a 6.8 µF molded tantalum capacitor manufactured by KYOCERA AVX, rated for 6.3 V operation in a 0805 (2012 Metric) surface mount package. This component is designed for general-purpose applications requiring compact form factor and reliable performance across industrial temperature ranges. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance can be maintained within the allowed parameter tolerances for this product category, ensuring functional interchangeability in circuit designs.

Substiute Parts

TACR685K006R

KYOCERA AVXIn Stock: 755TACR685K006R Datasheet

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TAJR685K010RNJ

KYOCERA AVXIn Stock: 2151TAJR685K010RNJ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The TAJR685K010RNJ qualifies as a substitute for the TACR685K006R based on the following substitution criteria:

Matching Parameters (Required for Substitution):

• Capacitance: 6.8 µF (identical)
• Tolerance: ±10% (identical)
• Type: Molded tantalum (identical)
• Mounting Type: Surface Mount (identical)
• Package / Case: 0805 (2012 Metric) (identical)
• Operating Temperature Range: -55°C to 125°C (identical)
• RoHS Status: ROHS3 Compliant (identical)
• MSL Rating: 1 (Unlimited) (identical)

Allowable Variation Parameters:

• Voltage - Rated: 10 V (substitute) vs. 6.3 V (main part) — Higher voltage rating provides enhanced design margin and is acceptable for applications operating at or below 6.3 V
• ESR: 5.2 Ohm (substitute) vs. 5 Ohm (main part) — Minimal variation within acceptable tolerance for general-purpose applications
• Physical Dimensions: Minor variations within 0805 package specification envelope

Parameter Comparison

Engineering Selection Recommendations

Both the TACR685K006R and TAJR685K010RNJ are active production components with full ROHS3 compliance and unlimited moisture sensitivity ratings, ensuring compliance with current environmental and regulatory standards.

The TAJR685K010RNJ provides a higher voltage rating (10 V vs. 6.3 V), which establishes additional design margin for applications operating within the original 6.3 V specification. The ESR differential (5.2 Ohm vs. 5 Ohm) is negligible for general-purpose applications. Both components maintain identical capacitance, tolerance, temperature range, and package specifications.

Selection between these parts should be based on circuit voltage requirements, PCB layout constraints (the substitute offers reduced seated height), and component availability.

Frequently Asked Questions (FAQ)

Q: Can TAJR685K010RNJ be used as a direct replacement for TACR685K006R?

A: Yes. Both components share identical capacitance (6.8 µF), tolerance (±10%), operating temperature range (-55°C to 125°C), package type (0805 / 2012 Metric), and compliance certifications (ROHS3, MSL 1). The higher voltage rating of the substitute provides design margin for circuits operating at 6.3 V or below.

Q: What is the significance of the voltage rating difference?

A: The TAJR685K010RNJ is rated for 10 V operation, while the TACR685K006R is rated for 6.3 V. In applications where the circuit voltage does not exceed 6.3 V, the higher-rated substitute operates with increased voltage margin, which is acceptable and does not degrade performance.

Q: Are there physical compatibility concerns?

A: Both components use the 0805 (2012 Metric) surface mount package. Minor dimensional variations exist within specification: the substitute is slightly longer (2.05mm vs. 2.00mm) and shorter in seated height (1.20mm vs. 1.50mm). These variations remain within standard 0805 package tolerances and do not affect PCB footprint compatibility.

Q: Do both parts meet current compliance requirements?

A: Yes. Both TACR685K006R and TAJR685K010RNJ are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited) moisture sensitivity ratings, meeting current environmental and regulatory standards.

Q: What is the ESR difference between these parts?

A: The TAJR685K010RNJ has an ESR of 5.2 Ohm compared to 5 Ohm for the TACR685K006R. This 0.2 Ohm difference is negligible for general-purpose applications and does not impact functional performance in standard circuit designs.