WMF1S47K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF1S47K is a 0.047 µF polyester film capacitor rated for 100V DC operation in an axial through-hole package. Manufactured by Cornell Dubilier Electronics (CDE), this component is classified as obsolete. Due to its discontinued status, identifying equivalent substitute parts is essential for design continuity, maintenance applications, and component procurement. The WMF1S47K-F represents the active production equivalent with identical electrical and mechanical specifications.

Substiute Parts

WMF1S47K

Cornell Dubilier Electronics (CDE)In Stock: 1110WMF1S47K Datasheet

Current PartRFQ

WMF1S47K-F

Cornell Dubilier Electronics (CDE)In Stock: 1726WMF1S47K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF1S47K is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 0.047 µF (exact match required)
• Tolerance: ±10% (defines acceptable capacitance range)
• Voltage rating: 100V DC minimum (no derating permitted)
• Dielectric material: Polyester (determines frequency response and temperature stability)

Mechanical Parameters:

• Mounting type: Through Hole (PCB assembly compatibility)
• Package style: Axial (physical form factor and lead configuration)
• Physical dimensions: 0.256" Dia × 0.811" L (board layout and spacing constraints)
• Termination: PC Pins (solder joint compatibility)

Environmental Parameters:

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

The WMF1S47K-F qualifies as a direct substitute based on complete alignment with all specified parameters. The primary distinction is product status: the original part is obsolete, while the substitute is in active production.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: WMF1S47K-F

The WMF1S47K-F is the direct functional equivalent of the obsolete WMF1S47K. All electrical, mechanical, and environmental specifications are identical. The substitute part is currently in active production, ensuring long-term availability and supply chain continuity.

Compliance Considerations:

The WMF1S47K-F carries RoHS3 compliance certification, whereas the original WMF1S47K is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the WMF1S47K-F is the appropriate selection. Both parts maintain REACH Unaffected status and EAR99 export classification.

Inventory and Procurement:

The WMF1S47K-F is available in bulk packaging with 1,646 units in current stock. The original WMF1S47K remains available with 1,083 units in inventory but carries obsolete status, indicating no future production.

Frequently Asked Questions (FAQ)

Q: Can the WMF1S47K-F be used as a direct replacement for the WMF1S47K in existing designs?

A: Yes. The WMF1S47K-F is electrically and mechanically identical to the WMF1S47K. All specifications—capacitance, voltage rating, tolerance, temperature range, physical dimensions, and termination type—are equivalent. Direct substitution is permissible without circuit modification.

Q: What is the difference between the WMF1S47K and WMF1S47K-F?

A: The primary differences are product status and RoHS compliance. The WMF1S47K is obsolete and RoHS non-compliant. The WMF1S47K-F is in active production and RoHS3 compliant. All functional and mechanical parameters are identical.

Q: Are there packaging differences between these parts?

A: The WMF1S47K is supplied in standard packaging, while the WMF1S47K-F is supplied in bulk packaging. Both parts use identical axial through-hole form factors with PC pin termination and the same physical dimensions (0.256" Dia × 0.811" L).

Q: Does the RoHS3 compliance of the WMF1S47K-F affect circuit performance?

A: No. RoHS3 compliance relates to material composition and manufacturing processes, not electrical performance. The WMF1S47K-F delivers identical electrical characteristics to the original part.

Q: What is the lead spacing for these axial capacitors?

A: Lead spacing information is not specified in the provided technical data. Physical dimensions are 0.256" Dia × 0.811" L (6.50mm × 20.60mm). Verify lead spacing against PCB design files or contact the manufacturer for precise lead-to-lead measurements.

Q: Can these capacitors be used in high-frequency applications?

A: These are polyester film capacitors rated for general-purpose applications. Frequency response characteristics are not specified in the provided data. Consult detailed frequency response curves or application notes from Cornell Dubilier Electronics for high-frequency suitability.

Q: What is the moisture sensitivity level, and what does MSL 1 mean?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life. These components do not require special moisture-controlled storage or handling procedures. Standard storage conditions are acceptable.