WMC2P22K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMC2P22K is a 0.22 µF polyester film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 250V DC operation with ±10% tolerance. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing system maintenance and new design implementations. The axial through-hole configuration and polyester dielectric make this capacitor suitable for high-pulse and DV/DT applications requiring stable capacitance across temperature ranges from -55°C to 125°C.

Substiute Parts

WMC2P22K

Cornell Dubilier Electronics (CDE)In Stock: 1051WMC2P22K Datasheet

Current PartRFQ

WMC2P22K-F

Cornell Dubilier Electronics (CDE)In Stock: 1133WMC2P22K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMC2P22K is determined by strict equivalence in the following parameters:

Critical Parameters for Substitution:

• Capacitance value: 0.22 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric material: Polyester (exact match required)
• Mounting type: Through Hole (exact match required)
• Package configuration: Axial (exact match required)
• Physical dimensions: 0.382" Dia x 1.217" L (exact match required)
• Termination type: PC Pins (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

Allowable Variation:

• Voltage rating: The substitute part may have a lower DC voltage rating provided it meets or exceeds the application's actual operating voltage requirements. The WMC2P22K-F operates at 200V DC, which represents a 50V reduction from the original 250V specification.

Parameter Comparison

Engineering Selection Recommendations

WMC2P22K-F Selection Criteria:

The WMC2P22K-F is a direct substitute for the WMC2P22K based on identical capacitance, tolerance, dielectric material, physical dimensions, and operating temperature specifications. The primary differences are:

1. Product Status: WMC2P22K-F is Active, whereas WMC2P22K is Obsolete. This ensures long-term availability and supply chain continuity.

2. Voltage Rating: WMC2P22K-F operates at 200V DC compared to the original 250V DC. Substitution is valid only when the application's actual operating voltage does not exceed 200V DC. If the circuit requires the full 250V DC rating, this substitute is not appropriate.

3. RoHS Compliance: WMC2P22K-F is ROHS3 Compliant, whereas WMC2P22K is RoHS non-compliant. For applications subject to RoHS regulations, WMC2P22K-F is the required choice.

4. Inventory Availability: WMC2P22K-F has 1025 pieces in stock versus 951 pieces for the obsolete WMC2P22K, providing better supply assurance.

224MWR250K Consideration:

The part number 224MWR250K is listed as a substitute but no technical specifications are provided in the input data. This part cannot be evaluated for substitution without complete parameter information.

Frequently Asked Questions (FAQ)

Q1: Can WMC2P22K-F replace WMC2P22K in all applications?

A: WMC2P22K-F is a direct substitute provided the circuit's maximum operating voltage does not exceed 200V DC. If your application requires the full 250V DC rating of the original part, WMC2P22K-F is not suitable. Verify your circuit's actual voltage stress before substitution.

Q2: What is the significance of the voltage rating difference between WMC2P22K (250V) and WMC2P22K-F (200V)?

A: The 50V difference represents a reduction in the component's voltage withstand capability. The substitute part is rated for 200V DC maximum, while the original is rated for 250V DC. Substitution is valid only when the application's peak voltage remains below 200V DC with appropriate safety margins.

Q3: Are the physical dimensions identical between WMC2P22K and WMC2P22K-F?

A: Yes. Both parts have identical axial package dimensions of 0.382" diameter by 1.217" length (9.70mm x 30.90mm). PCB layout and mechanical mounting are directly compatible.

Q4: What is the impact of RoHS compliance on substitution?

A: WMC2P22K-F is ROHS3 Compliant while WMC2P22K is RoHS non-compliant. For new designs or products subject to RoHS regulations, WMC2P22K-F is mandatory. For legacy systems without RoHS requirements, either part is acceptable from a compliance standpoint.

Q5: Are the capacitance and tolerance specifications identical?

A: Yes. Both WMC2P22K and WMC2P22K-F are rated at 0.22 µF with ±10% tolerance. Electrical performance in terms of capacitance value is identical.

Q6: What is the operating temperature range for both parts?

A: Both parts operate across -55°C to 125°C. Temperature performance is identical between the main part and substitute.

Q7: Can I use WMC2P22K-F as a direct drop-in replacement on existing PCBs?

A: Yes, provided voltage rating requirements are met. The axial through-hole configuration, PC pin termination, and physical dimensions are identical, allowing direct PCB mounting without layout modifications.