TAP684K035FCS Equivalent & Substitute Parts

Part Overview

The TAP684K035FCS is a 0.68 µF conformal coated tantalum capacitor rated for 35 V with ±10% tolerance, manufactured by KYOCERA AVX. This radial through-hole component is designed for general-purpose applications requiring stable capacitance performance across the operating temperature range of -55°C to 125°C. The part is currently in active production status with 682 units available in inventory. Substitute parts may be required due to inventory constraints, lead time considerations, or application-specific tolerance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

TAP684K035FCS

KYOCERA AVXIn Stock: 705TAP684K035FCS Datasheet

Current PartRFQ

TAP684M035CCS

KYOCERA AVXIn Stock: 3734TAP684M035CCS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TAP684K035FCS is determined by strict equivalence in the following critical parameters:

• Capacitance Value: Must be 0.68 µF (no deviation)
• Voltage Rating: Must be 35 V or higher (equal or greater)
• Package Type: Must be radial through-hole with identical lead spacing (0.197" / 5.00mm)
• Physical Dimensions: Must match 0.177" diameter (4.50mm) and 0.335" maximum height (8.50mm)
• Mounting Configuration: Must be through-hole radial
• ESR: Must be 10 Ohm
• Operating Temperature Range: Must support -55°C to 125°C
• Compliance: Must maintain ROHS3 compliance

The TAP684M035CCS qualifies as a direct substitute based on these parameters. The tolerance difference (±20% versus ±10%) does not disqualify substitution when the application circuit design accommodates the wider tolerance band.

Parameter Comparison

Engineering Selection Recommendations

Both the TAP684K035FCS and TAP684M035CCS are active production components manufactured by KYOCERA AVX with full ROHS3 compliance. Selection between these parts should be based on the following criteria:

Primary Part (TAP684K035FCS): Select when circuit design requires the tighter ±10% tolerance specification and inventory availability is sufficient for project timelines.

Substitute Part (TAP684M035CCS): Select when the application circuit design accommodates ±20% tolerance variation, or when inventory constraints require the substitute. The significantly higher inventory level (3709 units versus 682 units) makes this part suitable for high-volume production runs or time-sensitive applications.

Both parts maintain identical electrical performance characteristics, physical footprint compatibility, and regulatory compliance status. The decision between them is driven by tolerance requirements and supply chain considerations rather than functional differences.

Frequently Asked Questions (FAQ)

Q: Can TAP684M035CCS replace TAP684K035FCS in any application?

A: Substitution is valid only when the circuit design tolerates ±20% capacitance variation. If the application requires ±10% tolerance or tighter, the original TAP684K035FCS must be used. Verify circuit tolerance requirements before substitution.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical radial package dimensions (0.177" diameter, 0.335" maximum height) and lead spacing (0.197"). They are mechanically interchangeable on PCBs designed for either part.

Q: Do both parts meet the same compliance standards?

A: Yes. Both TAP684K035FCS and TAP684M035CCS are ROHS3 compliant and REACH unaffected. They carry identical regulatory certifications and are suitable for equivalent applications.

Q: What is the primary difference between these substitute parts?

A: The only functional difference is capacitance tolerance: TAP684K035FCS offers ±10% tolerance while TAP684M035CCS offers ±20% tolerance. All other electrical and mechanical specifications are identical.

Q: Which part should be selected for new designs?

A: For new designs, evaluate circuit tolerance requirements first. If ±20% tolerance is acceptable, TAP684M035CCS is preferred due to higher inventory availability and shorter lead times. If tighter tolerance is mandatory, specify TAP684K035FCS.