ECQ-P4103JU Film Capacitor - Equivalent & Substitute Parts

Part Overview

The ECQ-P4103JU is a 10000 pF film capacitor manufactured by Panasonic Electronic Components, rated for 400V DC operation with polypropylene dielectric material. This radial through-hole component is designed for high-frequency switching applications and high pulse/DV/DT environments. The part is currently obsolete, making equivalent substitutes necessary for ongoing production, maintenance, and repair applications where this capacitor specification is required.

Substiute Parts

ECQ-P4103JU

Panasonic Electronic ComponentsIn Stock: 1139ECQ-P4103JU Datasheet

Current PartRFQ

DPFF4S1J-F

Cornell Dubilier Electronics (CDE)In Stock: 1138DPFF4S1J-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ECQ-P4103JU is determined by strict equivalence across the following parameters:

• Capacitance value: 10000 pF (exact match required)
• Tolerance: ±5% (matching tolerance band)
• Voltage Rating - DC: 400V (minimum requirement; higher ratings acceptable)
• Dielectric Material: Polypropylene (PP) or metallized polypropylene
• Mounting Type: Through Hole radial configuration
• Termination: PC Pins for PCB mounting
• Operating Temperature: Minimum -40°C to +105°C range coverage

The DPFF4S1J-F from Cornell Dubilier Electronics qualifies as a direct substitute based on matching capacitance, tolerance, DC voltage rating, polypropylene dielectric composition, radial through-hole mounting, and PC pin termination. The substitute maintains functional equivalence for the specified application categories.

Parameter Comparison

Engineering Selection Recommendations

The DPFF4S1J-F from Cornell Dubilier Electronics is electrically equivalent to the obsolete ECQ-P4103JU across all critical parameters: capacitance, tolerance, DC voltage rating, and dielectric material composition. The substitute offers an extended lower operating temperature limit (-55°C versus -40°C), providing enhanced performance margin in cold environments.

Physical dimensions differ between the two parts. The DPFF4S1J-F is slightly shorter (0.402" versus 0.453" seated height) and narrower (0.256" versus 0.402" width), with reduced lead spacing (0.374" versus 0.591"). PCB layout verification is required to confirm mechanical compatibility before implementation.

The DPFF4S1J-F maintains active product status with ROHS3 compliance and REACH unaffected designation, supporting long-term supply chain continuity. The Panasonic ECQ-P4103JU, classified as obsolete, presents supply risk for new production and ongoing maintenance applications.

Frequently Asked Questions (FAQ)

Q: Can the DPFF4S1J-F be used as a direct replacement for the ECQ-P4103JU in existing designs?

A: Electrical substitution is valid based on matching capacitance (10000 pF), tolerance (±5%), DC voltage rating (400V), and polypropylene dielectric material. Physical compatibility requires PCB layout verification due to differences in lead spacing (0.591" versus 0.374") and package dimensions.

Q: What is the significance of the metallized polypropylene dielectric in the DPFF4S1J-F?

A: Metallized polypropylene provides self-healing characteristics under electrical stress, enhancing reliability in high-pulse and DV/DT applications. This represents a performance enhancement over standard polypropylene while maintaining electrical equivalence for the specified 10000 pF, 400V rating.

Q: Are there compliance or certification differences between these parts?

A: The ECQ-P4103JU is obsolete with no active compliance status. The DPFF4S1J-F is active production with ROHS3 compliance and REACH unaffected status, supporting regulatory requirements for new designs and long-term supply availability.

Q: What is the impact of the different lead spacing on PCB design?

A: Lead spacing differs significantly: ECQ-P4103JU uses 0.591" (15.00mm) spacing, while DPFF4S1J-F uses 0.374" (9.50mm) spacing. PCB footprints must be verified for mechanical fit. Existing through-hole patterns designed for 15.00mm spacing will not accommodate 9.50mm lead spacing without modification.

Q: Can the DPFF4S1J-F operate in the same temperature range as the ECQ-P4103JU?

A: The DPFF4S1J-F operating range (-55°C ~ 105°C) exceeds the ECQ-P4103JU range (-40°C ~ 105°C). Full compatibility is confirmed for applications within the original -40°C to +105°C specification.