WMF2P22K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF2P22K is a 0.22 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 250V DC voltage rating and polyester dielectric. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and procurement planning. The WMF series axial film capacitor is designed for general-purpose applications requiring stable capacitance and reliable performance across extended temperature ranges.

Substiute Parts

WMF2P22K

Cornell Dubilier Electronics (CDE)In Stock: 788WMF2P22K Datasheet

Current PartRFQ

WMF2P22K-F

Cornell Dubilier Electronics (CDE)In Stock: 838WMF2P22K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF2P22K is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 0.22 µF (exact match required)
• Tolerance: ±10% (defines acceptable capacitance range)
• Voltage rating: 250V DC (minimum threshold for circuit safety)
• Dielectric material: Polyester (determines frequency response and stability characteristics)

Mechanical Parameters:

• Mounting type: Through Hole (PCB assembly compatibility)
• Package configuration: Axial (lead orientation and board layout compatibility)
• Physical dimensions: 0.413" Dia × 1.185" L (ensures mechanical fit in existing designs)
• Termination style: PC Pins (solder connection compatibility)

Environmental Parameters:

• Operating temperature range: -55°C to 125°C (thermal performance envelope)
• Moisture sensitivity level: 1 (Unlimited) (storage and handling requirements)

Substitute parts must match all parameters listed above. Variations in any electrical, mechanical, or environmental specification disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

WMF2P22K-F as Primary Substitute:

The WMF2P22K-F is a direct functional equivalent to the WMF2P22K across all critical electrical, mechanical, and environmental parameters. Both parts share identical capacitance, voltage rating, dielectric material, physical dimensions, and operating temperature specifications.

Product Status Consideration:

The WMF2P22K is classified as obsolete, while the WMF2P22K-F maintains active product status. This status difference indicates ongoing manufacturing availability and supply chain support for the WMF2P22K-F variant.

Compliance Difference:

The WMF2P22K-F is ROHS3 compliant, whereas the original WMF2P22K is RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulatory requirements. Both parts maintain REACH Unaffected status and EAR99 export classification.

Packaging Consideration:

The WMF2P22K-F is supplied in bulk packaging, compared to the original part's standard packaging designation. This affects procurement logistics but does not alter electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can WMF2P22K-F replace WMF2P22K in existing circuit designs?

A: Yes. The WMF2P22K-F is electrically and mechanically equivalent to the WMF2P22K. All critical parameters—capacitance, voltage rating, dielectric material, physical dimensions, and operating temperature range—are identical. Direct substitution is supported without circuit redesign.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: Product status indicates manufacturing and supply availability. The WMF2P22K is obsolete and no longer in production. The WMF2P22K-F is active, ensuring continued availability for new procurement and long-term supply chain planning.

Q: Does the RoHS compliance difference affect substitution compatibility?

A: RoHS compliance is a regulatory and procurement consideration, not an electrical or mechanical one. Both parts function identically in circuit applications. The WMF2P22K-F's ROHS3 compliance is advantageous for applications subject to RoHS directives. The choice between parts depends on regulatory requirements applicable to the end application.

Q: Are the physical dimensions identical between both parts?

A: Yes. Both the WMF2P22K and WMF2P22K-F measure 0.413" diameter × 1.185" length (10.50mm × 30.10mm). Axial lead spacing and PC pin termination are identical, ensuring mechanical fit in existing PCB layouts.

Q: What does bulk packaging mean for the WMF2P22K-F?

A: Bulk packaging indicates the parts are supplied without individual component packaging, typically in larger quantities. This affects procurement and handling procedures but does not alter the component's electrical or mechanical specifications.

Q: Are there any temperature or environmental performance differences?

A: No. Both parts operate across the identical temperature range of -55°C to 125°C and share the same MSL rating of 1 (Unlimited), indicating equivalent environmental performance and storage requirements.