DSF050J124 Equivalent & Substitute Parts

Part Overview

The DSF050J124 is a 0.12 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 50V DC voltage rating, ±5% tolerance, and polyester metallized dielectric construction. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The radial through-hole mounting configuration and general-purpose application profile support direct substitution with compatible alternatives meeting the same electrical and mechanical specifications.

Substiute Parts

DSF050J124

Cornell Dubilier Electronics (CDE)In Stock: 854DSF050J124 Datasheet

Current PartRFQ

ECQ-E2124JB

Panasonic Electronic ComponentsIn Stock: 1421ECQ-E2124JB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSF050J124 is determined by strict equivalence in the following critical parameters:

Mandatory Equivalence Criteria:

• Capacitance value: 0.12 µF (exact match required)
• Tolerance: ±5% (exact match required)
• Dielectric material: Polyester, Metallized (exact match required)
• Mounting type: Through Hole (exact match required)
• Package configuration: Radial (exact match required)
• Lead spacing: 0.197" (5.00mm) (exact match required)
• Termination style: PC Pins (exact match required)

Allowable Variation Parameters:

• Voltage rating: Substitute parts may exceed the 50V DC requirement, provided the higher voltage rating does not compromise circuit design intent
• Physical dimensions: Substitute parts may vary in length, width, and height, provided they fit within the available board space and do not create mechanical interference
• Operating temperature range: Substitute parts may exceed the -40°C ~ 85°C range
• Product status: Active parts are preferred over obsolete parts for long-term availability

The ECQ-E2124JB meets all mandatory equivalence criteria and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E2124JB qualifies as a direct electrical and mechanical substitute for the DSF050J124 based on the following factors:

Electrical Compatibility: The substitute part maintains identical capacitance (0.12 µF) and tolerance (±5%) specifications. The increased DC voltage rating (250V versus 50V) provides additional design margin and does not create incompatibility in circuits designed for 50V operation. The extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 85°C) supports broader environmental applications.

Mechanical Compatibility: Both parts feature identical lead spacing (0.197" / 5.00mm) and radial through-hole mounting configuration, enabling direct PCB footprint compatibility. The ECQ-E2124JB exhibits larger physical dimensions and increased seated height, requiring verification of available board space to prevent mechanical interference.

Regulatory and Compliance Status: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements. The ECQ-E2124JB holds active product status, ensuring long-term availability and supply chain continuity compared to the obsolete DSF050J124.

Frequently Asked Questions (FAQ)

Q: Can the ECQ-E2124JB be used as a direct replacement for the DSF050J124 in existing designs?

A: The ECQ-E2124JB meets all mandatory electrical and mechanical substitution criteria. Verification of available PCB space is required due to increased physical dimensions (0.311" L x 0.224" W versus 0.287" L x 0.157" W) and seated height (0.457" versus 0.236").

Q: Why does the substitute part have a higher voltage rating (250V DC versus 50V DC)?

A: Higher voltage ratings in film capacitors do not create incompatibility in circuits designed for lower voltages. The increased rating provides additional design margin and is a common characteristic of substitute parts from different manufacturers.

Q: Are there any differences in dielectric material between the two parts?

A: Both parts use polyester metallized dielectric construction. The DSF050J124 specifies "Polyester, Metallized - Stacked" while the ECQ-E2124JB specifies "Polyester, Metallized." Both materials are functionally equivalent for general-purpose applications.

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

A: The ECQ-E2124JB supports operation from -40°C to 105°C, compared to the DSF050J124 range of -40°C to 85°C. This extended range does not create incompatibility and supports applications requiring higher temperature operation.

Q: Are both parts compliant with current regulatory standards?

A: Both the DSF050J124 and ECQ-E2124JB are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What is the significance of the ECQ-E2124JB having active product status?

A: Active product status indicates ongoing manufacturing and availability through authorized distributors. The DSF050J124 is classified as obsolete, meaning production has ceased and future availability is limited to existing inventory.