DMM2P68K-F Equivalent & Substitute Parts Reference

Part Overview

The DMM2P68K-F is a 0.68 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 250V DC operation with ±10% tolerance. This radial through-hole component utilizes polyester metallized dielectric technology and operates across the temperature range of -55°C to 125°C. The part is Active in product status and maintains full ROHS3 compliance with REACH Unaffected designation. Substitute parts are identified when circuit requirements permit voltage rating upgrades or when alternative packaging configurations are necessary for board layout optimization.

Substiute Parts

DMM2P68K-F

Cornell Dubilier Electronics (CDE)In Stock: 1198DMM2P68K-F Datasheet

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DME4P68K-F

Cornell Dubilier Electronics (CDE)In Stock: 875DME4P68K-F Datasheet

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DME2P68K-F

Cornell Dubilier Electronics (CDE)In Stock: 1608DME2P68K-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DMM2P68K-F is determined by the following criteria:

Primary Substitution Criteria:

• Capacitance value must equal 0.68 µF
• Tolerance must be ±10%
• Dielectric material must be Polyester, Metallized
• Mounting type must be Through Hole
• Package configuration must be Radial
• Operating temperature range must encompass -55°C to 125°C
• RoHS3 compliance required

Allowable Variation Parameters:

• Voltage rating may be equal or higher than 250V DC
• Physical dimensions may vary within board layout constraints
• Lead spacing may differ if circuit board design permits
• Series designation may differ (DMM, DME, or equivalent)

Two substitute parts meet these criteria: DME4P68K-F (voltage upgrade category) and DME2P68K-F (compact form factor category).

Parameter Comparison

Engineering Selection Recommendations

DME4P68K-F Selection Criteria:

The DME4P68K-F represents a voltage-rated upgrade path for the DMM2P68K-F. This substitute maintains identical capacitance (0.68 µF) and tolerance (±10%) while providing elevated DC voltage rating of 400V compared to the original 250V specification. The AC voltage rating increases from 160V to 200V. All core electrical and thermal parameters remain compatible. This part is suitable for applications where circuit design permits higher voltage margin or where system voltage specifications have been revised upward. Both parts maintain ROHS3 compliance and Active product status. Physical dimensions differ slightly: the DME4P68K-F is narrower (0.295" vs 0.354") but taller (0.709" vs 0.610"), requiring verification of available board space. Lead spacing remains identical at 0.886" (22.50 mm).

DME2P68K-F Selection Criteria:

The DME2P68K-F provides a compact form factor alternative while maintaining the original 250V DC and 160V AC voltage ratings. Capacitance and tolerance specifications are identical to the DMM2P68K-F. This substitute is applicable when board layout constraints require reduced component footprint. The DME2P68K-F measures 0.728" L x 0.256" W with 0.591" seated height, representing a significantly smaller envelope than the main part. Critical distinction: lead spacing is reduced to 0.591" (15.00 mm) versus the original 0.886" (22.50 mm), necessitating PCB design compatibility verification. Both parts maintain ROHS3 compliance and Active product status.

Frequently Asked Questions (FAQ)

Q: Can DME4P68K-F be used as a direct replacement for DMM2P68K-F without circuit modification?

A: The DME4P68K-F is electrically compatible as a direct substitute from a capacitance and tolerance perspective. The elevated voltage rating (400V DC vs 250V DC) does not create functional incompatibility in circuits designed for 250V operation. However, physical dimensions differ: the DME4P68K-F is narrower but taller. Board layout verification is required to confirm available mounting space. Lead spacing remains at 0.886" (22.50 mm), matching the original part.

Q: What is the primary difference between DME4P68K-F and DME2P68K-F?

A: The DME4P68K-F provides higher voltage rating (400V DC) in a mid-sized package. The DME2P68K-F maintains the original voltage rating (250V DC) but in a compact form factor with reduced lead spacing (0.591" vs 0.886"). Selection depends on whether voltage margin or physical space is the design priority.

Q: Is the DME2P68K-F compatible with the original PCB layout?

A: The DME2P68K-F has different lead spacing (0.591" vs 0.886"), requiring PCB design modification. Direct board substitution without layout changes is not possible. This part is suitable only for new designs or boards specifically redesigned for the compact lead spacing.

Q: Do all three parts meet environmental compliance requirements?

A: All three parts (DMM2P68K-F, DME4P68K-F, and DME2P68K-F) are ROHS3 compliant and REACH Unaffected. All maintain Active product status with full availability.

Q: What determines whether a substitute part is acceptable?

A: Substitution eligibility requires: identical capacitance (0.68 µF), identical tolerance (±10%), identical dielectric material (Polyester, Metallized), identical mounting type (Through Hole), identical package configuration (Radial), compatible operating temperature range (-55°C to 125°C), and equivalent or higher voltage rating. Physical dimensions and lead spacing must be verified against PCB design constraints.

Q: Can voltage rating be lower than 250V DC?

A: No. Substitute parts must maintain equal or higher voltage rating than the original specification. Lower voltage ratings create functional incompatibility and are not acceptable substitutes.