DME4W1P2K-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The DME4W1P2K-F is a 1.2 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) in the DME series. This radial through-hole component operates at 400V DC with polyester metallized dielectric construction. The part is currently active in production with 979 units in stock inventory.

Film capacitors of this specification are essential in power supply filtering, AC coupling, and general-purpose energy storage applications where reliability and long operational life are required. Equivalent substitute parts may be necessary due to supply chain constraints, lead time requirements, or inventory availability.

Substiute Parts

DME4W1P2K-F

Cornell Dubilier Electronics (CDE)In Stock: 1053DME4W1P2K-F Datasheet

Current PartRFQ

BFC237353125

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 3001BFC237353125 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DME4W1P2K-F is determined by strict alignment of the following parameters:

Critical Matching Parameters:

• Capacitance value: 1.2 µF (exact match required)
• DC voltage rating: 400V minimum
• Tolerance: ±10%
• Dielectric type: Polyester, Metallized
• Mounting configuration: Through Hole Radial
• Lead spacing: 0.886" (22.50mm)
• Termination type: PC Pins

Acceptable Variation Parameters:

• AC voltage rating: May differ if DC rating is maintained
• Operating temperature range: May be narrower than original
• Physical dimensions (length, width, height): Minor variations acceptable within PCB clearance limits
• Packaging format: Bulk or tape acceptable

The substitute part BFC237353125 meets all critical matching parameters and is therefore classified as a direct equivalent for circuit-level substitution.

Parameter Comparison

Engineering Selection Recommendations

The BFC237353125 qualifies as a direct substitute for the DME4W1P2K-F based on the following engineering criteria:

Electrical Compatibility: All critical electrical parameters match exactly: 1.2 µF capacitance, ±10% tolerance, 400V DC rating, and polyester metallized dielectric construction. The AC voltage rating of 220V on the substitute exceeds the original 200V specification, providing equivalent or superior performance in AC applications.

Mechanical Compatibility: Lead spacing, termination type, and radial through-hole mounting configuration are identical. Physical dimensions are within acceptable tolerance for standard PCB footprints designed for the original part.

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

Temperature Performance: The substitute operates across -55°C to 105°C, which covers the lower portion of the original -55°C to 125°C range. Applications requiring operation above 105°C require verification against specific circuit requirements.

Inventory Availability: The substitute part BFC237353125 maintains higher inventory levels (2928 units) compared to the original part (979 units), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can BFC237353125 be used as a direct replacement for DME4W1P2K-F without circuit modification?

A: Yes. The substitute part matches all critical electrical and mechanical parameters. No circuit modification is required for standard applications operating within the substitute's temperature range (-55°C to 105°C).

Q: What is the difference in operating temperature range between these parts?

A: The DME4W1P2K-F operates to 125°C maximum, while the BFC237353125 operates to 105°C maximum. Applications requiring sustained operation above 105°C should retain the original part specification.

Q: Are the physical dimensions identical?

A: Dimensions are functionally equivalent for PCB mounting. The DME4W1P2K-F measures 1.024" L × 0.374" W × 0.744" H (seated). The BFC237353125 measures 1.024" L × 0.394" W × 0.768" H (seated). The 0.02" width and 0.024" height differences do not affect standard PCB footprint compatibility.

Q: Do both parts have the same lead spacing?

A: Yes. Both parts feature 0.886" (22.50mm) lead spacing, ensuring identical PCB hole pattern compatibility.

Q: What is the significance of the different series designations (DME vs. MKT373)?

A: Series designation indicates different product lines from different manufacturers. The DME series is Cornell Dubilier's product line, while MKT373 is Vishay's equivalent product line. Despite different series names, the electrical and mechanical specifications are equivalent.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected, meeting identical regulatory requirements.

Q: Which part should be selected for new designs?

A: Selection should be based on availability, lead time, and cost considerations. Both parts are functionally equivalent for applications operating within -55°C to 105°C. For applications requiring operation above 105°C, the DME4W1P2K-F is required.