DSF050J394 Film Capacitor - Equivalent & Substitute Parts

Part Overview

The DSF050J394 is a 0.39 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 50V DC voltage rating, designed for general-purpose applications. This component features polyester metallized-stacked dielectric construction in a radial through-hole package. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support, maintenance, and new design implementations where this specification remains applicable.

Key Parameters

Parameter	Value
Capacitance	0.39 µF
Tolerance	±5%
Voltage Rating - DC	50V
Dielectric Material	Polyester, Metallized - Stacked
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package Type	Radial
Lead Spacing	0.197" (5.00mm)
Termination	PC Pins
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the DSF050J394 are identified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility:

Capacitance value must equal 0.39 µF
Tolerance must be ±5%
Voltage rating must be equal to or greater than 50V DC
Dielectric material must be polyester-based (metallized construction)

Mechanical Compatibility:

Mounting type must be through-hole
Package configuration must be radial
Lead spacing must accommodate 0.197" (5.00mm) pitch or be compatible with existing PCB layouts
Termination must be PC pins

Compliance Requirements:

RoHS3 compliance required
REACH unaffected status required

Two substitute parts meet these criteria with varying voltage ratings and thermal specifications.

Parameter Comparison

Parameter	DSF050J394 (Main)	B32529C0394J000 (Direct Substitute)	ECQ-E2394JB (Similar Substitute)
Manufacturer	Cornell Dubilier Electronics (CDE)	EPCOS - TDK Electronics	Panasonic Electronic Components
Capacitance	0.39 µF	0.39 µF	0.39 µF
Tolerance	±5%	±5%	±5%
Voltage Rating - DC	50V	63V	250V
Dielectric Material	Polyester, Metallized - Stacked	Polyester, PET, Metallized - Stacked	Polyester, Metallized
Operating Temperature	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 105°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial	Radial	Radial
Lead Spacing	0.197" (5.00mm)	0.197" (5.00mm)	0.394" (10.00mm)
Termination	PC Pins	PC Pins	PC Pins
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

B32529C0394J000 (Direct Substitute - EPCOS/TDK):

This part provides the closest electrical match with a 63V DC rating, exceeding the 50V requirement of the original DSF050J394. The B32529C0394J000 maintains identical capacitance (0.39 µF) and tolerance (±5%), with matching lead spacing (5.00mm) for direct PCB compatibility. The extended operating temperature range (-55°C ~ 125°C) provides superior thermal performance compared to the original specification. Product status is active with full RoHS3 and REACH compliance. This part is classified as a direct manufacturer substitute suitable for applications requiring minimal design modification.

ECQ-E2394JB (Similar Substitute - Panasonic):

This part offers significantly elevated voltage rating (250V DC) with identical capacitance and tolerance specifications. The 10.00mm lead spacing differs from the original 5.00mm pitch, requiring PCB layout verification before implementation. Operating temperature range extends to 105°C, providing improved thermal margin. Product status is active with full RoHS3 and REACH compliance. This part is suitable for applications where higher voltage margin is beneficial and PCB layout can accommodate the increased lead spacing.

Both substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can the B32529C0394J000 directly replace the DSF050J394 without PCB modification?

A: Yes. The B32529C0394J000 maintains identical lead spacing (5.00mm) and radial through-hole configuration. No PCB layout changes are required. The higher voltage rating (63V vs. 50V) provides additional safety margin without affecting circuit performance.

Q: Why does the ECQ-E2394JB have different lead spacing?

A: The ECQ-E2394JB features 10.00mm lead spacing compared to the original 5.00mm. This is a physical dimension difference inherent to the Panasonic design. PCB hole pattern verification is required before substitution.

Q: Are both substitute parts suitable for automotive applications?

A: The B32529C0394J000 is specified for automotive and EMI/RFI suppression applications. The ECQ-E2394JB is specified for general-purpose applications. Application requirements should determine which substitute is appropriate.

Q: What is the impact of the extended operating temperature range on the B32529C0394J000?

A: The B32529C0394J000 operates from -55°C to 125°C, compared to the original -40°C to 85°C range. This extended range provides greater thermal margin and is beneficial for applications in extreme temperature environments. No negative impact occurs in standard temperature applications.

Q: Are both substitute parts RoHS3 compliant?

A: Yes. Both B32529C0394J000 and ECQ-E2394JB are RoHS3 compliant and REACH unaffected, matching the regulatory status of the original DSF050J394.

Q: What is the primary difference between the two substitute options?

A: The B32529C0394J000 provides a direct physical and electrical match with improved specifications (63V rating, extended temperature range). The ECQ-E2394JB offers significantly higher voltage rating (250V) but requires PCB layout verification due to different lead spacing (10.00mm vs. 5.00mm).

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message