DME6P68K-F Equivalent & Substitute Parts Reference

Part Overview

The DME6P68K-F is a 0.68 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 630V DC operation with ±10% tolerance. This radial through-hole component utilizes polyester metallized dielectric technology and is classified as Active product status with full ROHS3 compliance. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory certifications align with the original component's functional requirements.

Key Parameters

Parameter	Value	Substitution Relevance
Capacitance	0.68 µF	Critical - Must match exactly
Voltage Rating (DC)	630V	Critical - Must match or exceed
Voltage Rating (AC)	250V	Critical - Must match or exceed
Tolerance	±10%	Critical - Must match
Dielectric Material	Polyester, Metallized	Critical - Defines electrical behavior
Mounting Type	Through Hole	Critical - PCB assembly compatibility
Package / Case	Radial	Critical - Physical form factor
Lead Spacing	0.886" (22.50mm)	Critical - PCB footprint compatibility
Termination	PC Pins	Critical - Connection method
RoHS Status	ROHS3 Compliant	Regulatory - Supply chain requirement

Substitute Part Grouping Explanation

Substitution eligibility for the DME6P68K-F is determined by strict alignment of the following parameters:

Electrical Parameters (Non-negotiable):

Capacitance value: 0.68 µF
DC voltage rating: 630V minimum
AC voltage rating: 250V minimum
Tolerance: ±10%
Dielectric type: Polyester, Metallized

Mechanical Parameters (Non-negotiable):

Mounting type: Through Hole
Package configuration: Radial
Lead spacing: 0.886" (22.50mm)
Termination style: PC Pins

Regulatory Parameters:

RoHS3 compliance required
REACH Unaffected status

The substitute part QXK2J684KTP (Nichicon) satisfies all critical electrical and mechanical parameters. Physical dimensions show minor variations within acceptable manufacturing tolerances. Operating temperature range differs but does not affect substitution validity for general-purpose applications.

Parameter Comparison

Parameter	DME6P68K-F (CDE)	QXK2J684KTP (Nichicon)	Match Status
Capacitance	0.68 µF	0.68 µF	Exact Match
Tolerance	±10%	±10%	Exact Match
Voltage Rating - DC	630V	630V	Exact Match
Voltage Rating - AC	250V	250V	Exact Match
Dielectric Material	Polyester, Metallized	Polyester, Metallized	Exact Match
Mounting Type	Through Hole	Through Hole	Exact Match
Package / Case	Radial	Radial	Exact Match
Lead Spacing	0.886" (22.50mm)	0.886" (22.50mm)	Exact Match
Termination	PC Pins	PC Pins	Exact Match
Size / Dimension (L x W)	1.024" x 0.472" (26.00mm x 12.00mm)	1.004" x 0.445" (25.50mm x 11.30mm)	Within Tolerance
Height - Seated (Max)	0.827" (21.00mm)	0.831" (21.10mm)	Within Tolerance
Operating Temperature	-55°C ~ 125°C	-40°C ~ 105°C	Partial Overlap
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Exact Match
REACH Status	REACH Unaffected	REACH Unaffected	Exact Match

Engineering Selection Recommendations

Primary Component - DME6P68K-F (Cornell Dubilier Electronics):

Active product status with 840 units in stock
ROHS3 compliant, REACH unaffected
Operating temperature range: -55°C to 125°C
Suitable for applications requiring extended low-temperature operation

Substitute Component - QXK2J684KTP (Nichicon):

Active product status with 1166 units in stock
ROHS3 compliant, REACH unaffected
Operating temperature range: -40°C to 105°C
Suitable for general-purpose applications within specified temperature limits
Identical electrical specifications and lead spacing ensure direct PCB compatibility
Minor physical dimension variations remain within standard manufacturing tolerances

Selection between these components should be based on application temperature requirements and inventory availability. Both components meet all critical electrical, mechanical, and regulatory parameters for equivalent functionality.

Frequently Asked Questions (FAQ)

Q: Can QXK2J684KTP replace DME6P68K-F in all applications?

A: QXK2J684KTP is electrically and mechanically equivalent for applications operating between -40°C and 105°C. Applications requiring operation below -40°C or above 105°C must use DME6P68K-F, which supports -55°C to 125°C.

Q: Are the physical dimension differences significant?

A: Physical dimensions vary within acceptable manufacturing tolerances. Lead spacing remains identical at 0.886" (22.50mm), ensuring PCB footprint compatibility. Height differences (0.827" vs 0.831") are negligible for standard through-hole applications.

Q: Do both parts have identical electrical performance?

A: Yes. Capacitance (0.68 µF), tolerance (±10%), DC voltage rating (630V), AC voltage rating (250V), and dielectric material (polyester, metallized) are identical between both components.

Q: Are both parts RoHS3 compliant?

A: Yes. Both DME6P68K-F and QXK2J684KTP carry ROHS3 compliance certification and REACH Unaffected status.

Q: What is the lead spacing requirement for PCB design?

A: Both components require 0.886" (22.50mm) lead spacing. This specification is identical and non-negotiable for proper PCB footprint compatibility.

Q: Can these parts be used interchangeably on existing PCBs?

A: Yes, provided the application temperature range does not exceed the limits of the substitute component (-40°C to 105°C for QXK2J684KTP). Identical lead spacing and through-hole mounting ensure direct compatibility.

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