Würth Elektronik 7427140 Snap-Ring Snap Ferrite Core Equivalent & Substitute Parts

Part Overview

The Würth Elektronik 7427140 is a hinged snap-on ferrite core designed for free-hanging applications with an impedance of 98Ohm at 100MHz. This component features a 0.402" inner diameter and 1.220" outer diameter with a 1.024" length. The product is currently obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

Substiute Parts

7427140

Würth ElektronikIn Stock: 7517427140 Datasheet

Current PartRFQ

7427026

Würth ElektronikIn Stock: 10697427026 Datasheet

MFR RecommendedRFQ

7427153

Würth ElektronikIn Stock: 103047427153 Datasheet

MFR RecommendedRFQ

7427153S

Würth ElektronikIn Stock: 12037427153S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 7427140 is constrained by the following critical parameters: inner diameter (0.402" / 10.20mm), design type (hinged snap-on), impedance specification (98Ohm @ 100MHz), and mounting configuration (free hanging).

The substitute parts identified fall into two categories based on design compatibility:

Category 1: Hinged Snap-On Design with Matching Inner Diameter Parts 7427153 and 7427153S maintain the hinged snap-on design and inner diameter specification. However, these parts operate at 165Ohm @ 100MHz impedance and feature chassis mount capability rather than free-hanging configuration. These represent functional alternatives where impedance tolerance and mounting method adjustment are acceptable.

Category 2: Clip-Together Design with Matching Inner Diameter Part 7427026 provides a clip-together assembly option with the same 0.402" inner diameter and 98Ohm @ 100MHz impedance. This design eliminates the snap-on mechanism in favor of a clip-together assembly approach, suitable for applications where assembly method flexibility exists.

Parameter Comparison

Engineering Selection Recommendations

For Direct Functional Replacement (Impedance and Inner Diameter Match): Part 7427026 provides the closest functional match with identical impedance (98Ohm @ 100MHz) and inner diameter (0.402" / 10.20mm). This part is active and available in production quantities. The clip-together design differs from the snap-on mechanism but maintains free-hanging mounting capability. Selection of this part requires confirmation that the assembly method change is compatible with the application.

For Hinged Snap-On Design Continuation: Parts 7427153 and 7427153S maintain the hinged snap-on design with key-required operation and are available in active production status. These parts feature different impedance (165Ohm @ 100MHz), smaller inner diameter (0.315" / 8.00mm), and chassis mount configuration. Part 7427153S is supplied in tray packaging while 7427153 is supplied in bulk packaging. Selection of these parts requires verification that impedance tolerance, inner diameter compatibility, and mounting method transition are acceptable for the application.

Both substitute options are ROHS3 compliant and REACH unaffected, providing regulatory continuity from the obsolete 7427140.

Frequently Asked Questions (FAQ)

Q: Can 7427026 directly replace 7427140 in existing assemblies? A: Part 7427026 matches the critical electrical parameter (98Ohm @ 100MHz) and inner diameter (0.402" / 10.20mm) but uses a clip-together assembly design instead of snap-on. Physical dimensions differ significantly. Mechanical compatibility must be verified before substitution.

Q: What is the primary difference between 7427153 and 7427153S? A: Both parts are electrically and mechanically identical. The difference is packaging: 7427153 is supplied in bulk packaging while 7427153S is supplied in tray packaging. Selection depends on procurement and handling requirements.

Q: Why do 7427153 and 7427153S have different impedance than 7427140? A: These parts operate at 165Ohm @ 100MHz compared to the 7427140 specification of 98Ohm @ 100MHz. This impedance difference reflects different ferrite material composition and core geometry. Application compatibility with the higher impedance value must be confirmed.

Q: Are all substitute parts available in current production? A: Yes. Parts 7427026, 7427153, and 7427153S are all active products with current inventory availability. The original 7427140 is obsolete and no longer manufactured.

Q: What mounting configuration changes occur with these substitutes? A: The 7427140 is free-hanging. Part 7427026 maintains free-hanging mounting. Parts 7427153 and 7427153S transition to chassis mount with key-required operation, requiring mechanical redesign of the mounting interface.