DSF050J393 Equivalent & Substitute Parts Reference

Part Overview

The DSF050J393 is a 0.039 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 50V DC operation with ±5% tolerance. This component features a polyester metallized-stacked radial construction and is designed for general-purpose applications in through-hole mounting configurations.

The DSF050J393 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Substiute Parts

DSF050J393

Cornell Dubilier Electronics (CDE)In Stock: 712DSF050J393 Datasheet

Current PartRFQ

B32529C1393J189

EPCOS - TDK ElectronicsIn Stock: 1439B32529C1393J189 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSF050J393 is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 0.039 µF (exact match required)
• Tolerance: ±5% (exact match required)
• Dielectric material family: Polyester metallized-stacked construction
• Mounting type: Through hole radial configuration
• Lead spacing: 0.197" (5.00mm)
• Termination style: PC pins

Allowable Variation Parameters:

• Voltage rating: Substitute parts must meet or exceed 50V DC rating
• Operating temperature range: Substitute parts may extend beyond the original range
• Product status: Active or obsolete status does not disqualify a substitute
• Packaging format: May differ from original (e.g., Cut Tape vs. bulk)

The substitute part B32529C1393J189 satisfies all mandatory matching criteria and exceeds the voltage rating specification, making it a valid electrical and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The B32529C1393J189 manufactured by EPCOS - TDK Electronics is a qualified substitute for the obsolete DSF050J393. Selection is based on the following engineering criteria:

Electrical Compatibility: The substitute part maintains identical capacitance (0.039 µF) and tolerance (±5%) specifications. The 100V DC voltage rating of the substitute exceeds the original 50V requirement, providing additional design margin without introducing functional incompatibility.

Mechanical Compatibility: Lead spacing (0.197" / 5.00mm), package type (radial), and termination style (PC pins) are identical, ensuring direct board-level substitution without layout modifications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.

Availability: The substitute part is classified as active product status with documented inventory availability (1346 pcs), addressing the supply chain limitation of the obsolete DSF050J393.

Temperature Performance: The substitute part extends the operating temperature range to -55°C ~ 125°C, providing enhanced performance envelope compared to the original -40°C ~ 85°C specification.

Frequently Asked Questions (FAQ)

Q: Can the B32529C1393J189 be used as a direct replacement for the DSF050J393 in existing circuit boards?

A: Yes. The B32529C1393J189 is mechanically and electrically compatible. Identical lead spacing (5.00mm), radial package configuration, and PC pin termination allow direct board-level substitution without PCB layout changes.

Q: Does the higher voltage rating (100V vs. 50V) of the substitute part affect circuit operation?

A: No. A higher voltage rating does not degrade performance in circuits designed for lower voltage operation. The substitute part operates safely at the original 50V specification and below.

Q: Are there any compliance or certification differences between the two parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. No compliance barriers exist for substitution.

Q: What is the significance of the extended operating temperature range (-55°C ~ 125°C) in the substitute part?

A: The extended range indicates enhanced thermal stability. Applications requiring operation beyond the original -40°C ~ 85°C specification benefit from this characteristic. For applications within the original temperature range, both parts perform equivalently.

Q: Is the substitute part available in the same packaging format as the original?

A: The substitute part is supplied in Cut Tape (CT) packaging, whereas the original DSF050J393 packaging format is not specified in available data. Both formats are suitable for through-hole assembly; packaging selection depends on production volume and assembly process requirements.

Q: What is the lead time and inventory status for the B32529C1393J189?

A: The substitute part is classified as active product with 1346 pcs documented in stock, indicating immediate availability compared to the obsolete DSF050J393.