Equivalent & Substitute Parts for Würth Elektronik 32401 RF Ferrite Sheet

Part Overview

The Würth Elektronik 32401 is a flexible RF EMI ferrite sheet designed for electromagnetic interference suppression applications. This component features a rubber-ferrite powder composite construction with non-conductive, single-sided adhesive backing. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing procurement and design requirements.

Substiute Parts

32401

Würth ElektronikIn Stock: 99432401 Datasheet

Current PartRFQ

32401S

Würth ElektronikIn Stock: 95332401S Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Würth Elektronik 32401 is determined by the following critical parameters:

• Dimensional Compatibility: Length 11.693" (297.00mm) and width 8.268" (210.00mm) must be maintained
• Material Composition: Rubber-ferrite powder construction with non-conductive properties
• Adhesive Configuration: Non-conductive, single-sided adhesive backing
• Operating Temperature Range: -20°C ~ 90°C capability
• Regulatory Compliance: ROHS3 compliance and EAR99 ECCN classification
• Series Alignment: WE-FAS series designation

The substitute part 32401S maintains all critical dimensional, material, and compliance parameters. Thickness variation (0.008" vs 0.005") represents a design refinement within the same product family and does not preclude substitution where mechanical clearance permits.

Parameter Comparison

Engineering Selection Recommendations

The 32401S serves as the direct substitute for the discontinued 32401. Both components are manufactured by Würth Elektronik within the WE-FAS series and maintain identical dimensional footprints, material specifications, and regulatory compliance profiles.

The 32401S is currently in active production status, ensuring ongoing availability for new designs and production replenishment. Both parts carry ROHS3 compliance and EAR99 ECCN classification, meeting equivalent regulatory requirements.

The thickness differential (0.008" to 0.005") represents a design optimization within the same product family. Selection between these variants depends on mechanical envelope constraints within the application. Where space permits the thinner profile, the 32401S offers equivalent EMI suppression performance with reduced material volume.

Frequently Asked Questions (FAQ)

Q: Can the 32401S directly replace the 32401 in existing designs?

A: Yes, the 32401S maintains identical length, width, material composition, adhesive type, and operating temperature range. The reduced thickness (0.005" vs 0.008") requires verification that mechanical clearance exists within the application enclosure.

Q: Are there compliance differences between these parts?

A: No. Both parts carry ROHS3 compliance, EAR99 ECCN classification, and MSL rating 1 (Unlimited). Regulatory requirements are equivalent.

Q: What is the significance of the thickness reduction in the 32401S?

A: The 32401S employs a thinner ferrite-rubber composite layer while maintaining the same planar dimensions and adhesive backing. This represents a material efficiency improvement within the WE-FAS product family. EMI suppression performance is determined by material composition and surface area, both of which remain constant.

Q: Is the 32401S available in bulk packaging?

A: Yes, the 32401S is supplied in bulk packaging configuration, as opposed to the standard packaging of the 32401.

Q: What storage conditions apply to both parts?

A: Both the 32401 and 32401S require storage within the temperature range of -4°F ~ 194°F (-20°C ~ 90°C). MSL rating 1 indicates unlimited shelf life under standard moisture conditions.