74271142S

Overview

The Würth Elektronik 74271142S is a STAR-TEC series snap-on ferrite core designed for cable EMI suppression. It features a hinged design requiring a safety key for secure closure. The component utilizes 4W620 ferrite material and provides an impedance of 98 Ohms at 25 MHz and 182 Ohms at 100 MHz. It accommodates cables with a maximum inner diameter of 5 mm. External dimensions are 32.5 mm in length, 18.8 mm in width, and 13.2 mm in height. The unit operates within a temperature range of -25°C to +105°C.

Feature Summary

• Hinged snap-on construction with integrated safety key technology for secure installation
• High impedance performance using 4W620 ferrite material for effective noise suppression
• Square cross-section design optimized for single cable mounting

Applications

• General electronic equipment EMI filtering
• Safety-related application signal line protection
• Power cable noise reduction

Procurement Notes

Verify the specific suffix 'S' indicates the inclusion of the safety key accessory, as distinct from non-keyed variants. Confirm RoHS compliance status via the manufacturer datasheet before integration. Ensure the selected distributor source matches the official Würth Elektronik part identification to avoid counterfeit components.

Selection Notes

Select this model when a secure, keyed closure mechanism is required for vibration-prone environments. The 5 mm aperture limits usage to smaller gauge cables. Compare impedance curves against target noise frequencies to ensure adequate attenuation at 25 MHz and 100 MHz.

Part Context

This component belongs to the Würth Elektronik STAR-TEC family of snap-on ferrites. It is specifically engineered for rapid installation on existing cabling without disconnection. The design emphasizes mechanical security through its unique locking feature, distinguishing it from standard split-core alternatives.

Replacement Considerations

Direct substitutes include other Wurth STAR-TEC models with matching 5 mm apertures and similar impedance profiles. Verify that any replacement also includes the necessary safety key accessory if mechanical retention is critical.

FAQ

What is the function of the safety key?

The safety key ensures the hinged ferrite core remains securely closed during operation, preventing accidental opening due to vibration or handling.

What ferrite material is used in this core?

The 74271142S utilizes 4W620 ferrite material, which provides high permeability and impedance characteristics suitable for broadband noise suppression.