WMF05P33K Equivalent & Substitute Parts

Part Overview

The WMF05P33K is a 0.33 µF film capacitor rated for 50V DC with polyester dielectric material, designed for through-hole axial mounting in general-purpose applications. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design support and procurement continuity. Active production alternatives with identical electrical and mechanical specifications are available to ensure uninterrupted supply chain access.

Substiute Parts

WMF05P33K

Cornell Dubilier Electronics (CDE)In Stock: 848WMF05P33K Datasheet

Current PartRFQ

WMF05P33K-F

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF05P33K is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance value: 0.33 µF
• Tolerance: ±10%
• Voltage rating (DC): 50V minimum
• Dielectric material: Polyester

Mechanical Equivalence Requirements:

• Mounting type: Through Hole
• Package configuration: Axial
• Physical dimensions: 0.429" Dia x 0.811" L (10.90mm x 20.60mm)
• Termination style: PC Pins

Compliance Considerations:

• RoHS compliance status
• REACH compliance status
• Product status (active vs. obsolete)

Substitute parts must satisfy all electrical and mechanical parameters identically to ensure direct board-level compatibility without design modification or re-qualification.

Parameter Comparison

Engineering Selection Recommendations

WMF05P33K-F is the primary direct substitute for the obsolete WMF05P33K. Both components are manufactured by Cornell Dubilier Electronics (CDE) within the WMF series and maintain identical electrical and mechanical specifications. The WMF05P33K-F carries active product status and achieves ROHS3 compliance, providing regulatory advantage over the original obsolete part while maintaining full electrical and physical compatibility.

334MWR050K serves as an alternative equivalent substitute, meeting all specified electrical and mechanical parameters. This part is also active in production and ROHS3 compliant. Selection between WMF05P33K-F and 334MWR050K depends on procurement availability, cost considerations, and supply chain preferences, as both satisfy identical functional requirements.

For applications requiring RoHS non-compliant components, the original WMF05P33K remains available in existing inventory (749 pieces). However, transition to ROHS3-compliant alternatives is recommended for new designs and long-term production continuity.

Frequently Asked Questions (FAQ)

Q: Can WMF05P33K-F be used as a direct replacement for WMF05P33K without PCB modification?

A: Yes. The WMF05P33K-F maintains identical capacitance (0.33 µF), voltage rating (50V DC), tolerance (±10%), dielectric material (polyester), operating temperature range (-55°C ~ 125°C), and physical dimensions (0.429" Dia x 0.811" L). Through-hole axial mounting and PC pin termination are identical, enabling direct board-level substitution without design changes.

Q: What is the difference between WMF05P33K and WMF05P33K-F?

A: The primary difference is product status and regulatory compliance. WMF05P33K is obsolete and RoHS non-compliant, while WMF05P33K-F is active in production and ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Are 334MWR050K and WMF05P33K-F interchangeable?

A: Yes. Both parts meet identical electrical specifications (0.33 µF, ±10%, 50V DC, polyester dielectric) and mechanical requirements (through-hole axial, 0.429" Dia x 0.811" L, PC pins). Both are active products with ROHS3 compliance. Selection depends on procurement availability and supply chain considerations.

Q: What parameters must match for a substitute part to be compatible?

A: Critical matching parameters are capacitance value (0.33 µF), tolerance (±10%), DC voltage rating (50V), dielectric material (polyester), operating temperature range (-55°C ~ 125°C), mounting type (through hole), package configuration (axial), physical dimensions (0.429" Dia x 0.811" L), and termination style (PC pins).

Q: Is RoHS compliance a functional requirement or a regulatory consideration?

A: RoHS compliance is a regulatory and supply chain consideration, not a functional electrical requirement. ROHS3-compliant alternatives (WMF05P33K-F and 334MWR050K) are recommended for new designs and applications subject to environmental regulations. The original WMF05P33K remains functionally equivalent but carries regulatory limitations.

Q: Can these capacitors be used in AC applications?

A: The provided specifications include only DC voltage ratings (50V). No AC voltage rating data is provided for these components. Application in AC circuits requires verification against manufacturer datasheets.