ECW-FD2J684KC Equivalent & Substitute Parts

Part Overview

The ECW-FD2J684KC is a 0.68 µF film capacitor rated for 630V DC, manufactured by Panasonic Electronic Components. This polypropylene metallized radial capacitor is designed for EMI/RFI suppression, high-frequency switching, and high pulse applications. The part is currently active in production with 687 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable.

Substiute Parts

ECW-FD2J684KC

Panasonic Electronic ComponentsIn Stock: 789ECW-FD2J684KC Datasheet

Current PartRFQ

ECW-FD2J684K

Panasonic Electronic ComponentsIn Stock: 2027ECW-FD2J684K Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECW-FD2J684KC is determined by strict equivalence across the following critical parameters:

• Capacitance value: 0.68 µF (exact match required)
• Tolerance: ±10% (exact match required)
• DC voltage rating: 630V (exact match required)
• Dielectric material: Polypropylene (PP), Metallized (exact match required)
• Operating temperature range: -40°C ~ 105°C (exact match required)
• Mounting type: Through Hole (exact match required)
• Package type: Radial (exact match required)
• Physical dimensions and lead spacing (exact match required)
• Termination type: PC Pins (exact match required)

The substitute part ECW-FD2J684K meets all these criteria. The addition of AC voltage rating (141V) in the substitute part does not affect DC circuit compatibility and represents an enhancement in specification coverage.

Parameter Comparison

Engineering Selection Recommendations

Both the ECW-FD2J684KC and ECW-FD2J684K are active production parts manufactured by Panasonic Electronic Components. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications.

The ECW-FD2J684K substitute provides equivalent performance in DC applications with the additional specification of 141V AC rating. This part carries higher inventory availability (1980 units in stock versus 687 units), supporting supply chain continuity.

Selection between these parts should be based on availability requirements and procurement lead times. Both parts are electrically and mechanically interchangeable for applications requiring 0.68 µF, 630V DC film capacitors with polypropylene dielectric and radial through-hole mounting.

Frequently Asked Questions (FAQ)

Q: Can ECW-FD2J684K replace ECW-FD2J684KC in my circuit?

A: Yes. Both parts are identical in capacitance (0.68 µF), DC voltage rating (630V), tolerance (±10%), dielectric material (polypropylene metallized), operating temperature range (-40°C ~ 105°C), physical dimensions, lead spacing, and termination type. The substitute part includes an AC voltage rating specification (141V) not listed for the main part, which does not affect DC circuit compatibility.

Q: Are the physical dimensions identical?

A: Yes. Both parts share identical dimensions: 0.701" L x 0.366" W (17.80mm x 9.30mm), maximum seated height of 0.618" (15.70mm), and lead spacing of 0.591" (15.00mm). Both are radial through-hole packages with PC pin termination, ensuring direct PCB footprint compatibility.

Q: What compliance certifications apply to both parts?

A: Both ECW-FD2J684KC and ECW-FD2J684K are ROHS3 compliant and REACH unaffected. Both parts carry ECCN classification EAR99 and HTSUS code 8532.25.0070.

Q: Which part should I select based on availability?

A: ECW-FD2J684K currently has higher inventory (1980 units in stock) compared to ECW-FD2J684KC (687 units in stock). For applications where supply continuity is critical, the substitute part offers improved procurement flexibility.

Q: Are there any application limitations for the substitute part?

A: No. Both parts are rated for identical applications: EMI/RFI suppression, high-frequency switching, and high pulse/DV/DT environments. Application suitability is determined by the shared electrical and mechanical specifications.