DMM4P33K-F Equivalent & Substitute Parts Reference

Part Overview

The DMM4P33K-F is a 0.33 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 400V DC operation with polyester metallized dielectric construction. This radial through-hole component is classified as Active product status with full ROHS3 compliance and REACH unaffected designation. Substitute parts are identified when equivalent electrical performance is required across different voltage ratings, physical dimensions, or packaging configurations while maintaining the same capacitance value and tolerance specification.

Key Parameters

Parameter	Value
Capacitance	0.33 µF
Tolerance	±10%
Voltage Rating - DC	400V
Voltage Rating - AC	200V
Dielectric Material	Polyester, Metallized
Operating Temperature Range	-55°C to 125°C
Mounting Type	Through Hole
Package Type	Radial
Termination	PC Pins
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DMM4P33K-F is determined by the following criteria:

Primary Substitution Criteria:

Capacitance value: 0.33 µF (exact match required)
Tolerance: ±10% (exact match required)
Dielectric material: Polyester, Metallized (exact match required)
Mounting type: Through Hole (exact match required)
Termination: PC Pins (exact match required)

Variable Parameters Allowing Substitution:

Voltage rating (DC): Equal to or greater than 400V
Voltage rating (AC): Equal to or greater than 200V
Physical dimensions: May vary within PCB layout constraints
Lead spacing: May vary based on board design requirements
Series designation: Different series permitted if electrical specifications align

The DMM4P33K-F qualifies two substitute parts from the CDE product line: DME6P33K-F (higher voltage rating) and DME4P33K-F (same voltage rating, different physical dimensions).

Parameter Comparison

Parameter	DMM4P33K-F (Main)	DME6P33K-F (Upgrade)	DME4P33K-F (Similar)
Manufacturer	Cornell Dubilier Electronics	Cornell Dubilier Electronics	Cornell Dubilier Electronics
Series	DMM	DME	DME
Capacitance	0.33 µF	0.33 µF	0.33 µF
Tolerance	±10%	±10%	±10%
Voltage Rating - DC	400V	630V	400V
Voltage Rating - AC	200V	250V	200V
Dielectric Material	Polyester, Metallized	Polyester, Metallized	Polyester, Metallized
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-55°C to 125°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial	Radial	Radial
Termination	PC Pins	PC Pins	PC Pins
Length	1.024" (26.00mm)	1.024" (26.00mm)	0.728" (18.50mm)
Width	0.354" (9.00mm)	0.315" (8.00mm)	0.295" (7.50mm)
Height - Seated (Max)	0.630" (16.00mm)	0.748" (19.00mm)	0.646" (16.40mm)
Lead Spacing	0.886" (22.50mm)	0.886" (22.50mm)	0.591" (15.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

DME6P33K-F (Upgrade Substitute): This part is suitable for applications requiring higher voltage margin. The 630V DC rating provides 57.5% additional voltage headroom compared to the DMM4P33K-F. Physical dimensions are comparable (26.00mm length maintained, 22.50mm lead spacing preserved), with maximum seated height increasing to 19.00mm. All electrical parameters, compliance certifications (ROHS3, REACH Unaffected), and operating temperature range remain equivalent. Selection of this upgrade is appropriate when circuit design permits the increased height dimension and higher voltage rating is beneficial for system reliability.

DME4P33K-F (Similar Substitute): This part maintains identical voltage ratings (400V DC, 200V AC) and electrical specifications as the DMM4P33K-F. Physical dimensions are significantly reduced: length 18.50mm (versus 26.00mm), width 7.50mm (versus 9.00mm), and lead spacing 15.00mm (versus 22.50mm). Selection of this substitute is appropriate for space-constrained PCB layouts where the reduced footprint is advantageous and lead spacing compatibility with board design is confirmed. All compliance certifications and operating temperature range remain equivalent.

Frequently Asked Questions (FAQ)

Q: Can DME6P33K-F replace DMM4P33K-F in any application?

A: DME6P33K-F is electrically compatible as a direct substitute. The 630V DC rating exceeds the 400V requirement. However, the maximum seated height increases from 16.00mm to 19.00mm. PCB clearance must be verified before substitution.

Q: What is the primary difference between DME6P33K-F and DME4P33K-F?

A: DME6P33K-F provides 630V DC rating with larger physical dimensions (26.00mm length, 22.50mm lead spacing). DME4P33K-F maintains 400V DC rating with compact dimensions (18.50mm length, 15.00mm lead spacing). Voltage rating and physical footprint are the distinguishing factors.

Q: Are all three parts ROHS3 compliant?

A: Yes. DMM4P33K-F, DME6P33K-F, and DME4P33K-F are all ROHS3 compliant and REACH unaffected.

Q: Can DME4P33K-F be used if the original PCB is designed for 22.50mm lead spacing?

A: No. DME4P33K-F has 15.00mm lead spacing, which is incompatible with PCB layouts designed for 22.50mm spacing. Physical board modification would be required.

Q: Do all three parts operate across the same temperature range?

A: Yes. All three parts operate from -55°C to 125°C.

Q: What is the capacitance tolerance for all substitute options?

A: All three parts maintain ±10% tolerance on the 0.33 µF capacitance value.

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