WMF6P15K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF6P15K is a 0.15 µF film capacitor rated for 630V DC operation with polyester dielectric material, designed for through-hole axial mounting in general-purpose applications. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new production requirements. The WMF series from Cornell Dubilier Electronics represents a legacy product line, making substitute part identification critical for maintenance and redesign scenarios.

Substiute Parts

WMF6P15K

Cornell Dubilier Electronics (CDE)In Stock: 996WMF6P15K Datasheet

Current PartRFQ

WMF6P15K-F

Cornell Dubilier Electronics (CDE)In Stock: 929WMF6P15K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WMF6P15K is determined by strict equivalence across the following parameters:

Primary Substitution Criteria:

• Capacitance value: 0.15 µF (exact match required)
• Voltage rating: 630V DC minimum (equal or higher acceptable)
• Tolerance: ±10% (equal or tighter acceptable)
• Dielectric material: Polyester (required for electrical performance equivalence)
• Operating temperature range: -55°C to 125°C (equal or wider acceptable)
• Mounting type: Through Hole (required for PCB compatibility)
• Package type: Axial (required for form factor compatibility)
• Physical dimensions: 0.685" Dia × 1.374" L (required for mechanical fit)
• Termination: PC Pins (required for connection compatibility)

The WMF6P15K-F qualifies as a direct substitute based on identical specifications across all primary criteria. The distinction between these parts lies in product status and regulatory compliance, not electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

For New Production and Redesign Applications:

The WMF6P15K-F is the appropriate selection for new designs and production builds. This part maintains complete electrical and mechanical equivalence to the WMF6P15K while offering the advantage of active product status and ROHS3 compliance. The transition from obsolete to active status ensures long-term supply chain availability and manufacturing continuity.

For Legacy System Maintenance:

The WMF6P15K remains available in inventory (912 pieces) for direct replacement in existing systems where the original part number is specified. However, the WMF6P15K-F provides an equivalent alternative when supply constraints occur or when regulatory compliance upgrades are required.

Regulatory Compliance Consideration:

The WMF6P15K-F carries ROHS3 compliance certification, whereas the WMF6P15K is RoHS non-compliant. Both parts maintain REACH Unaffected status. Selection between these parts should account for end-product regulatory requirements and customer specifications regarding hazardous substance restrictions.

Frequently Asked Questions (FAQ)

Q: Can the WMF6P15K-F be used as a direct replacement for the WMF6P15K in existing circuit designs?

A: Yes. The WMF6P15K-F is electrically and mechanically equivalent to the WMF6P15K. All critical parameters—capacitance, voltage rating, tolerance, dielectric material, operating temperature range, mounting type, package configuration, physical dimensions, and termination style—are identical between the two parts. Direct substitution is valid for circuit functionality.

Q: What is the primary difference between the WMF6P15K and WMF6P15K-F?

A: The primary differences are product status and regulatory compliance. The WMF6P15K is classified as obsolete and is RoHS non-compliant. The WMF6P15K-F is an active product with ROHS3 compliance. Both parts are functionally identical in electrical and mechanical specifications.

Q: Are there any physical dimension differences between these parts?

A: No. Both the WMF6P15K and WMF6P15K-F share identical physical dimensions of 0.685" diameter by 1.374" length (17.40mm × 34.90mm). PCB layout and mechanical mounting considerations are identical for both parts.

Q: Which part should be specified for new product designs?

A: The WMF6P15K-F should be specified for new designs. As an active product with current manufacturing support and ROHS3 compliance, it provides superior supply chain reliability and regulatory alignment compared to the obsolete WMF6P15K.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the WMF6P15K and WMF6P15K-F operate across the identical temperature range of -55°C to 125°C. Thermal performance and derating considerations are equivalent for both parts.

Q: What is the tolerance specification for these capacitors?

A: Both parts carry a ±10% capacitance tolerance. This tolerance applies to the 0.15 µF nominal value, resulting in an acceptable capacitance range of 0.135 µF to 0.165 µF at 20°C.

Q: Can these axial film capacitors be mounted in any orientation on a PCB?

A: Axial components can be mounted horizontally or vertically on a PCB. However, the specific mounting orientation should be determined by circuit layout requirements and PCB design constraints. The through-hole PC pin termination accommodates standard PCB hole spacing for axial components.