WMF05P33K-F Equivalent & Substitute Parts

Part Overview

The WMF05P33K-F is a 0.33 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 50V DC voltage rating and ±10% tolerance. This polyester film capacitor is designed for general purpose applications in through-hole configurations. The part is currently active in production with 1077 units in stock. Alternative equivalent parts may be required due to availability constraints, design flexibility, or specific application requirements where the electrical and mechanical characteristics remain compatible within the defined parameter specifications.

Substiute Parts

WMF05P33K-F

Cornell Dubilier Electronics (CDE)In Stock: 1117WMF05P33K-F Datasheet

Current PartRFQ

334MWR050K

Cornell Dubilier / Illinois CapacitorIn Stock: 1138334MWR050K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF05P33K-F is permitted when the following electrical and mechanical parameters are maintained:

• Capacitance value: Must be 0.33 µF
• Tolerance: Must be ±10% or tighter
• Voltage Rating (DC): Must be equal to or greater than 50V
• Dielectric type: Polyester-based materials
• Mounting and termination: Through-hole axial configuration with PC pins
• Compliance: RoHS3 compliant, REACH unaffected

The 334MWR050K qualifies as a direct equivalent substitute based on these criteria. While dimensional differences exist between the main part and its substitute, both components satisfy the electrical specifications and mounting requirements for direct circuit board substitution.

Parameter Comparison

Engineering Selection Recommendations

Both the WMF05P33K-F and 334MWR050K are active production parts from the same manufacturer family with full RoHS3 compliance and REACH unaffected status. The electrical specifications—capacitance, tolerance, and DC voltage rating—are identical, enabling direct substitution in most applications.

The 334MWR050K employs metallized polyester construction with low ESR characteristics and operates within a reduced temperature range (-40°C ~ 105°C) compared to the WMF05P33K-F (-55°C ~ 125°C). Applications requiring the full extended temperature range of the WMF05P33K-F should confirm compatibility with the narrower operating window of the substitute.

Dimensional differences must be evaluated for space-constrained layouts. The 334MWR050K is significantly smaller in both diameter and length, which may facilitate board redesign or accommodate packaging constraints where the original part does not fit.

Frequently Asked Questions (FAQ)

Q: Can the 334MWR050K replace the WMF05P33K-F in all applications?

A: The 334MWR050K qualifies as an electrical equivalent based on capacitance, tolerance, and DC voltage rating. However, verify that the operating temperature range (-40°C ~ 105°C) is acceptable for your specific application. If extended temperature operation below -40°C or above 105°C is required, the WMF05P33K-F should be used.

Q: What are the physical differences between these parts?

A: The WMF05P33K-F measures 0.429" Dia x 0.811" L (10.90mm x 20.60mm), while the 334MWR050K measures 0.236" Dia x 0.453" L (6.00mm x 11.50mm). Both are axial through-hole components with PC pins. The smaller dimensions of the 334MWR050K may eliminate need for board rework in space-limited designs.

Q: Are both parts RoHS compliant?

A: Yes, both the WMF05P33K-F and 334MWR050K are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the significance of the metallized polyester in the 334MWR050K?

A: The 334MWR050K uses metallized polyester construction, which contributes to its low ESR characteristic. This is a material variant within polyester film dielectric technology and does not affect the core electrical equivalence for capacitance, tolerance, or voltage rating specifications.

Q: Should I be concerned about the different operating temperature ranges?

A: The temperature range difference is significant only if your application operates outside the 334MWR050K's specified range. For general purpose applications within -40°C to +105°C, both parts perform identically. If your design requires operation at temperatures outside this window, use the WMF05P33K-F with its extended -55°C to +125°C range.