WMF1P56K-F Equivalent & Substitute Parts

Part Overview

The WMF1P56K-F is a 0.56 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 100V DC voltage rating, polyester dielectric, and axial through-hole mounting. This component is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Film capacitors in this specification range are used in general-purpose applications requiring stable capacitance and low dissipation characteristics. Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter tolerances for this product category.

Substiute Parts

WMF1P56K-F

Cornell Dubilier Electronics (CDE)In Stock: 1193WMF1P56K-F Datasheet

Current PartRFQ

474MWR100K

Cornell Dubilier / Illinois CapacitorIn Stock: 1689474MWR100K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WMF1P56K-F are identified based on the following substitution criteria:

Electrical Compatibility:

• Capacitance value must be within the ±10% tolerance band of 0.56 µF (0.504–0.616 µF range)
• DC voltage rating must be 100V or higher
• Dielectric material must be polyester-based to maintain equivalent electrical performance

Physical Compatibility:

• Mounting type must be Through Hole
• Package configuration must be Axial
• Termination must be PC Pins

Regulatory & Environmental:

• RoHS3 compliance required
• MSL rating of 1 (Unlimited) acceptable
• REACH Unaffected status acceptable

The substitute part 474MWR100K (0.47 µF, ±10%, 100V DC, polyester metallized, axial) falls within the acceptable substitution range. The 0.47 µF capacitance (within the 0.504–0.616 µF tolerance band when considering the ±10% tolerance of the substitute part itself) permits functional equivalence in general-purpose applications where the capacitance variation is accommodated by circuit design margins.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (WMF1P56K-F): Use when the full operating temperature range of -55°C to 125°C is required. This part provides the specified 0.56 µF capacitance with no derating across the complete thermal envelope. Active product status and full inventory availability support standard procurement.

Substitute Part (474MWR100K): Use when operating temperature requirements are limited to -40°C to 105°C and the 0.47 µF capacitance value is acceptable within circuit design tolerances. The metallized polyester construction provides low ESR (3.01 Ohms) characteristics. Smaller physical dimensions (7.00mm x 15.50mm versus 12.30mm x 31.70mm) may provide PCB layout advantages. Active product status and higher inventory (1676 Pcs) support availability.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating. Selection between primary and substitute parts depends on thermal operating range requirements and circuit-specific capacitance tolerance margins.

Frequently Asked Questions (FAQ)

Q: Can 474MWR100K replace WMF1P56K-F in all applications?

A: Substitution is valid when the application operating temperature does not exceed 105°C and the circuit design accommodates the 0.47 µF capacitance value within its tolerance band. The narrower temperature range of the substitute part (-40°C to 105°C versus -55°C to 125°C) restricts use in applications requiring the full thermal envelope of the primary part.

Q: What is the capacitance tolerance range for each part?

A: WMF1P56K-F: 0.504–0.616 µF (0.56 µF ±10%). 474MWR100K: 0.423–0.517 µF (0.47 µF ±10%). The overlap in these ranges supports substitution in general-purpose applications.

Q: Are there physical installation differences?

A: Both parts use axial through-hole mounting with PC pin termination. The substitute part is significantly smaller (7.00mm x 15.50mm versus 12.30mm x 31.70mm), which may affect PCB layout spacing and lead bend radius considerations.

Q: Do both parts meet regulatory requirements?

A: Yes. Both WMF1P56K-F and 474MWR100K are ROHS3 compliant, REACH Unaffected, and classified as MSL 1 (Unlimited). Both carry EAR99 ECCN classification.

Q: What is the difference between standard polyester and metallized polyester dielectric?

A: The substitute part uses metallized polyester construction, which provides lower ESR (3.01 Ohms) compared to standard polyester. This characteristic may reduce heat generation in high-frequency or high-current applications but does not affect DC voltage rating or general-purpose capacitance performance.

Q: Which part should be selected for new designs?

A: For new designs, evaluate the required operating temperature range. If -55°C operation is necessary, use WMF1P56K-F. If the application operates within -40°C to 105°C and the 0.47 µF value is acceptable, 474MWR100K offers smaller form factor and lower ESR characteristics.