DSF100J393 Film Capacitor Equivalent & Substitute Parts

Part Overview

The DSF100J393 is a 0.039 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 100V DC operation with ±5% tolerance. This component features polyester metallized-stacked dielectric construction in a radial through-hole package, designed for general-purpose applications across an operating temperature range of -40°C to 85°C.

The DSF100J393 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy equipment utilizing this component.

Substiute Parts

DSF100J393

Cornell Dubilier Electronics (CDE)In Stock: 1040DSF100J393 Datasheet

Current PartRFQ

168393J100C-F

Cornell Dubilier Electronics (CDE)In Stock: 1028168393J100C-F Datasheet

DirectRFQ

ECQ-E2393JB

Panasonic Electronic ComponentsIn Stock: 3005ECQ-E2393JB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DSF100J393 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 0.039 µF (exact match required)
• Tolerance: ±5% (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial (exact match required)
• Lead Spacing: 0.197" (5.00mm) (exact match required)
• Termination: PC Pins (exact match required)

Allowable Variation Parameters:

• Voltage Rating - DC: Equal to or greater than 100V
• Operating Temperature Range: Equal to or greater than the specified range
• Physical Dimensions: Variations acceptable if lead spacing and mounting type remain unchanged
• Dielectric Material: Polyester, Metallized construction (consistent with original specification)

The substitute parts identified below satisfy all mandatory matching parameters and meet or exceed the allowable variation criteria.

Parameter Comparison

Engineering Selection Recommendations

168393J100C-F (Direct Substitute - Recommended Primary Choice)

The 168393J100C-F is classified as a direct manufacturer substitute from Cornell Dubilier Electronics. This part maintains identical electrical specifications (0.039 µF, ±5%, 100V DC) and mechanical compatibility (radial through-hole, 5.00mm lead spacing) with the DSF100J393. The 168393J100C-F carries active product status, ensuring ongoing availability and supply chain support. It is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The extended operating temperature range (-55°C to 125°C) provides superior thermal performance compared to the original specification. This part is the optimal choice for direct replacement applications.

ECQ-E2393JB (Similar Substitute - Alternative Option)

The ECQ-E2393JB is a Panasonic equivalent offering identical capacitance, tolerance, and mechanical compatibility. This part features an elevated DC voltage rating of 250V, providing enhanced voltage margin over the original 100V specification. The operating temperature range extends to 105°C, exceeding the original -40°C to 85°C range. The ECQ-E2393JB is ROHS3 compliant and REACH unaffected. Physical dimensions differ slightly (0.311" L x 0.177" W versus 0.295" L x 0.126" W for the original), but lead spacing remains at 5.00mm, ensuring PCB compatibility. This part is suitable for applications requiring higher voltage headroom or extended thermal performance.

Both substitute parts satisfy all mandatory electrical and mechanical parameters. Selection between them depends on supply availability, cost considerations, and specific application voltage and temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can the 168393J100C-F be used as a direct replacement for the DSF100J393?

A: Yes. The 168393J100C-F matches all mandatory parameters: 0.039 µF capacitance, ±5% tolerance, 100V DC rating, radial through-hole package, and 5.00mm lead spacing. It is electrically and mechanically compatible with the original specification.

Q: What is the primary difference between the 168393J100C-F and ECQ-E2393JB?

A: The 168393J100C-F maintains the original 100V DC rating and is manufactured by CDE. The ECQ-E2393JB is a Panasonic product with a higher 250V DC rating and extended operating temperature range to 105°C. Both share identical capacitance, tolerance, and lead spacing.

Q: Are there physical size differences between these substitute parts and the original DSF100J393?

A: The 168393J100C-F has slightly smaller dimensions (0.283" L x 0.098" W) compared to the DSF100J393 (0.295" L x 0.126" W). The ECQ-E2393JB is slightly larger (0.311" L x 0.177" W). However, all three parts maintain the same 5.00mm lead spacing, ensuring PCB footprint compatibility for radial through-hole mounting.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both the 168393J100C-F and ECQ-E2393JB are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Which substitute part should I select for a new design?

A: For new designs, either part is acceptable based on application requirements. The 168393J100C-F provides direct electrical equivalence to the original. The ECQ-E2393JB offers higher voltage rating and extended temperature range, providing additional design margin. Consult application voltage and temperature specifications to determine the optimal choice.

Q: What is the lead spacing for all three parts?

A: All three parts—DSF100J393, 168393J100C-F, and ECQ-E2393JB—feature 0.197" (5.00mm) lead spacing, ensuring compatibility with existing PCB layouts designed for radial through-hole capacitors.

Q: Are moisture sensitivity considerations relevant for these parts?

A: The DSF100J393 and 168393J100C-F both carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. The ECQ-E2393JB lists MSL as Not Applicable. All three parts are suitable for standard storage and handling conditions without special moisture control requirements.