MMP1W6P8K-F Equivalent & Substitute Parts

Part Overview

The MMP1W6P8K-F is a 6.8 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) in the MMP series. This through-hole axial component operates across a temperature range of -55°C to 125°C and is rated for 100V DC / 65V AC applications. The part is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Film capacitors of this specification are used in general-purpose applications requiring stable capacitance and long operational life. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

MMP1W6P8K-F

Cornell Dubilier Electronics (CDE)In Stock: 817MMP1W6P8K-F Datasheet

Current PartRFQ

685MWR100K

Cornell Dubilier / Illinois CapacitorIn Stock: 1037685MWR100K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMP1W6P8K-F is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 6.8 µF
• Tolerance: ±10%
• Voltage Rating - DC: 100V
• Dielectric Material: Polyester, Metallized
• Mounting Type: Through Hole
• Package / Case: Axial
• Termination: PC Pins

Allowable Variations:

• Voltage Rating - AC: Substitute may be rated at 63V (lower than 65V original specification)
• Operating Temperature Range: Substitute may have narrower range (-40°C ~ 105°C versus -55°C ~ 125°C)
• Physical dimensions: Substitute may differ in diameter and length while maintaining axial configuration
• ESR characteristics: Substitute may include specified ESR values not present in original part

The substitute part 685MWR100K meets all mandatory matching parameters and is therefore electrically and mechanically compatible for general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: MMP1W6P8K-F

The MMP1W6P8K-F is the specified component and should be used when available. This part provides the widest operating temperature range (-55°C ~ 125°C) and is rated for 65V AC operation.

Substitute Selection: 685MWR100K

The 685MWR100K is a direct electrical substitute for applications where the MMP1W6P8K-F is unavailable. Both parts are manufactured by Cornell Dubilier and share identical capacitance, tolerance, and DC voltage ratings. The substitute is suitable for deployment in circuits operating within the narrower temperature range of -40°C ~ 105°C and where AC voltage does not exceed 63V.

Compliance Considerations:

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across manufacturing and deployment environments. Both parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special handling requirements during storage or assembly.

Physical Integration:

The substitute part 685MWR100K has a smaller physical footprint (17.00mm diameter versus 23.00mm width) and slightly shorter length (34.00mm versus 35.00mm). PCB layout and mechanical clearance must be verified before substitution to ensure the smaller component does not create unintended design changes or spacing conflicts.

Frequently Asked Questions (FAQ)

Q: Can 685MWR100K be used as a direct replacement for MMP1W6P8K-F?

A: Yes, for applications operating within -40°C ~ 105°C and 63V AC maximum. Both parts have identical 6.8 µF capacitance, ±10% tolerance, and 100V DC rating. Verify circuit operating temperature and AC voltage requirements before substitution.

Q: What is the difference in physical size between these parts?

A: The MMP1W6P8K-F measures 23.00mm width × 13.00mm thickness × 35.00mm length. The 685MWR100K measures 17.00mm diameter × 34.00mm length. The substitute is more compact. Confirm PCB layout accommodates the smaller footprint.

Q: Are both parts RoHS compliant?

A: Yes. Both MMP1W6P8K-F and 685MWR100K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What does the ±10% tolerance mean for these capacitors?

A: The actual capacitance value will be within ±10% of the nominal 6.8 µF specification. Both parts share this tolerance, ensuring equivalent performance in circuits designed for this tolerance band.

Q: Why does the substitute have a lower AC voltage rating?

A: The 685MWR100K is rated for 63V AC versus 65V AC on the MMP1W6P8K-F. Both maintain 100V DC rating. Select the MMP1W6P8K-F if the circuit requires the full 65V AC specification.

Q: Do these parts require special handling during assembly?

A: No. Both parts carry MSL 1 (Unlimited) moisture sensitivity rating, indicating standard handling procedures are sufficient. No special moisture control or baking is required.

Q: What is ESR and why is it specified for the substitute?

A: ESR (Equivalent Series Resistance) is the internal resistance of the capacitor at operating frequency. The 685MWR100K specifies 260 mOhms. The MMP1W6P8K-F does not provide this specification. ESR becomes relevant in high-frequency or high-current applications; verify circuit requirements if ESR is critical.

Q: Can I use MMP1W6P8K-F in applications rated for -40°C ~ 105°C?

A: Yes. The MMP1W6P8K-F operates across -55°C ~ 125°C, which encompasses the narrower range. No performance degradation occurs when using a wider-range component in a narrower-range application.