ECW-FD2J394KC Film Capacitor Equivalent & Substitute Parts

Part Overview

The ECW-FD2J394KC is a 0.39 µF film capacitor manufactured by Panasonic Electronic Components, rated for 630V DC operation with polypropylene dielectric material. This radial through-hole component is designed for EMI/RFI suppression, high-frequency switching, and high pulse applications. The part is currently active in production with ROHS3 compliance and maintains robust inventory availability. Identifying equivalent and substitute parts is essential for supply chain continuity, design flexibility, and procurement optimization when the primary part becomes unavailable or when alternative sourcing is required.

Substiute Parts

ECW-FD2J394KC

Panasonic Electronic ComponentsIn Stock: 953ECW-FD2J394KC Datasheet

Current PartRFQ

ECW-FD2J394K

Panasonic Electronic ComponentsIn Stock: 1770ECW-FD2J394K Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECW-FD2J394KC is determined by strict equivalence across the following critical parameters:

• Capacitance Value: Must be 0.39 µF
• Tolerance: Must be ±10%
• Voltage Rating - DC: Must be 630V
• Dielectric Material: Must be Polypropylene (PP), Metallized
• Operating Temperature Range: Must be -40°C ~ 105°C
• Mounting Type: Must be Through Hole
• Package / Case: Must be Radial
• Physical Dimensions: Must match 0.701" L x 0.280" W (17.80mm x 7.10mm)
• Lead Spacing: Must be 0.591" (15.00mm)
• Termination: Must be PC Pins
• Compliance: Must maintain ROHS3 compliance

The ECW-FD2J394K qualifies as a parametric equivalent substitute, meeting all critical electrical and mechanical specifications required for direct replacement in the ECW-FD2J394KC application.

Parameter Comparison

Engineering Selection Recommendations

Both the ECW-FD2J394KC and ECW-FD2J394K are active production parts from Panasonic Electronic Components with ROHS3 compliance certification. The ECW-FD2J394K provides superior inventory availability (1732 pcs vs. 914 pcs), making it the preferred substitute for procurement and supply chain resilience. Both parts share identical electrical ratings, mechanical dimensions, and compliance certifications, ensuring functional equivalence in circuit applications. Selection between these parts should be based on inventory status, lead time requirements, and supplier availability rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can ECW-FD2J394K be used as a direct replacement for ECW-FD2J394KC?

A: Yes. The ECW-FD2J394K meets all critical electrical and mechanical specifications of the ECW-FD2J394KC, including capacitance value, voltage rating, dielectric material, physical dimensions, and lead spacing. Both parts are manufactured by Panasonic and maintain identical ROHS3 compliance.

Q: What is the difference between ECW-FD2J394KC and ECW-FD2J394K?

A: The primary difference is the AC voltage rating specification. The ECW-FD2J394K includes an AC voltage rating of 141V, while the ECW-FD2J394KC does not specify an AC rating. All other electrical and mechanical parameters are identical.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical dimensions of 0.701" L x 0.280" W (17.80mm x 7.10mm), maximum seated height of 0.532" (14.60mm), and lead spacing of 0.591" (15.00mm). They are mechanically interchangeable in PCB layouts.

Q: Do both parts have the same compliance certifications?

A: Yes. Both ECW-FD2J394KC and ECW-FD2J394K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which part should be selected for new designs?

A: Selection should be based on current inventory availability and procurement lead times. The ECW-FD2J394K currently maintains higher inventory levels (1732 pcs), providing better supply chain availability. Both parts are functionally equivalent for circuit design purposes.