ECQ-B2393JF Film Capacitor: Equivalent & Substitute Parts

Part Overview

The ECQ-B2393JF is a 0.039 µF polyester film capacitor rated for 200V DC operation in a radial through-hole package, manufactured by Panasonic Electronic Components. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part operates across a temperature range of -40°C to 105°C and is designed for general-purpose applications requiring stable capacitance and low dissipation characteristics inherent to polyester film technology.

Substiute Parts

ECQ-B2393JF

Panasonic Electronic ComponentsIn Stock: 805ECQ-B2393JF Datasheet

Current PartRFQ

ECQ-E2393JF

Panasonic Electronic ComponentsIn Stock: 1643ECQ-E2393JF Datasheet

SimilarRFQ

167393J250B-F

Cornell Dubilier Electronics (CDE)In Stock: 763167393J250B-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ECQ-B2393JF must satisfy the following electrical and mechanical criteria:

Electrical Compatibility:

• Capacitance value: 0.039 µF (exact match required)
• Tolerance: ±5% (matching specification)
• Voltage rating: Minimum 200V DC (equal or higher acceptable)
• Dielectric material: Polyester or metallized polyester (functionally equivalent)

Mechanical Compatibility:

• Mounting type: Through-hole radial configuration
• Termination: PC pins
• Lead spacing: 0.394" (10.00mm) or compatible spacing allowing PCB footprint accommodation
• Operating temperature: Minimum -40°C to 105°C range coverage

Compliance Considerations:

• RoHS compliance status (where applicable to end-use requirements)
• Product status (active preferred for long-term availability)

The identified substitute parts meet these criteria while offering improved voltage ratings and, in certain cases, enhanced environmental compliance.

Parameter Comparison

Engineering Selection Recommendations

ECQ-E2393JF (Panasonic): This substitute offers direct manufacturer continuity from Panasonic Electronic Components with active product status ensuring long-term availability. The 250V DC rating provides 25% voltage margin above the original specification. Metallized polyester construction delivers equivalent electrical performance with reduced physical dimensions. ROHS3 compliance supports modern manufacturing and environmental requirements. Lead spacing reduction from 10.00mm to 7.50mm requires PCB footprint verification but accommodates standard radial capacitor spacing conventions.

167393J250B-F (Cornell Dubilier Electronics): This alternative provides 250V DC rating with extended operating temperature range (-55°C to 125°C), offering broader environmental performance envelope. Metallized polyester dielectric maintains electrical characteristics. ROHS3 compliance and active product status ensure supply chain stability. Lead spacing matches the ECQ-E2393JF at 7.50mm. Selection of this substitute introduces a secondary manufacturer, appropriate where multi-source qualification is required or where extended temperature performance provides system-level benefits.

Both substitutes maintain exact capacitance and tolerance specifications while delivering superior voltage ratings and compliance posture compared to the obsolete ECQ-B2393JF.

Frequently Asked Questions (FAQ)

Q: Can ECQ-E2393JF or 167393J250B-F be used as direct drop-in replacements for ECQ-B2393JF?

A: Electrical substitution is valid. Both parts match the 0.039 µF capacitance and ±5% tolerance requirements. However, lead spacing differs: the original uses 10.00mm spacing while substitutes use 7.50mm spacing. PCB footprint compatibility must be verified before implementation. If the original PCB layout accommodates 7.50mm spacing, direct substitution is feasible.

Q: What is the significance of the voltage rating increase from 200V to 250V?

A: The higher voltage rating provides operational margin and typically indicates improved dielectric quality and manufacturing process. A 250V-rated capacitor can safely operate at 200V with enhanced reliability. This is a beneficial characteristic for substitution and does not create compatibility issues.

Q: How does metallized polyester differ from standard polyester film?

A: Metallized polyester uses a thin metal coating on the dielectric film rather than separate metal foil layers. This construction reduces physical size and weight while maintaining electrical performance. Both dielectric types are functionally equivalent for this application and support the same capacitance and tolerance specifications.

Q: Why do the substitute parts have different lead spacings?

A: Lead spacing reflects design evolution and manufacturing standardization. The 7.50mm spacing used in ECQ-E2393JF and 167393J250B-F represents current industry standard for radial film capacitors in this capacitance range. PCB design must accommodate this spacing, or alternative mounting solutions must be evaluated.

Q: What is the impact of RoHS3 compliance on part selection?

A: RoHS3 compliance indicates the part meets current environmental and hazardous substance restrictions applicable to electronic components. For applications subject to RoHS requirements, the compliant substitutes (ECQ-E2393JF and 167393J250B-F) are mandatory. For legacy systems without RoHS requirements, compliance status does not affect electrical performance.

Q: Is the extended temperature range of 167393J250B-F (-55°C to 125°C) necessary?

A: The extended range is not required if the application operates within -40°C to 105°C. Selection of 167393J250B-F is appropriate only when system-level thermal performance demands the broader operating envelope or when multi-source qualification strategy requires a secondary manufacturer option.