Wurth Elektronik Openable Ferrite Sleeve Key 31 mm, For General Application, Safety Relevant Application 28 mm,

View all Ferrite Sleeves
Bulk discount available

Subtotal (1 box of 20 units)*

£109.76

(exc. VAT)

£131.72

(inc. VAT)

Add to Basket
Select or type quantity
Temporarily out of stock
  • 20 unit(s) shipping from 26 January 2026
  • Plus 180 unit(s) shipping from 09 March 2026
  • Plus 60 unit(s) shipping from 30 March 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
Per Box*
20 - 20£5.488£109.76
40 +£5.269£105.38

*price indicative

Development Kit Box with a flash stating "Win"
Win A Würth Elektronik Lighting Development Kit
Spend as little as £1 and win a Würth Elektronik Lighting Kit, complete with exclusive follow-up technical support from the experts themselves. Promotion ends 30th November 2025.
Claim my Lighting Kit
RS Stock No.:
162-1272
Mfr. Part No.:
74271722S
Brand:
Wurth Elektronik
Find similar products by selecting one or more attributes.
Select all

Brand

Wurth Elektronik

Series

Starfix

Sub Type

Snap Ferrite

Product Type

Ferrite Sleeve

Application

General Application, Safety Relevant Application

Material

4W620

Impedance at 25 MHz

156Ω

Key

Yes

Openable

Yes

Impedance at 100 MHz

250Ω

Aperture Diameter

12.5mm

Number of Apertures

1

External Depth

31mm

External Height

28mm

External Width

35.1mm

Standards/Approvals

REACH, RoHS

COO (Country of Origin):
DE

STAR-FIX Snap Ferrite with Flexible Cable Fixing


Wurth Elektronik STAR-FIX snap ferrites feature patented flexible cable fixing and the prefixing cable clamping system allows for easy assembly. The use of key technology ensures that STAR-FIX ferrite sleeves are reusable, making them Ideal for cables with difficult access and test and measurement purposes.

Please note, the safety key (74271) is sold separately. Refer to 815-0021 to order the key.

NiZn core material

UL94-V0 plastic casing

Patented technology

Suitable for applications where the cable diameter can vary

Split Ferrite Rings


These split ferrite cores reduce the electromagnetic interference from being induced in or radiated from data and power cables. High attenuation ratings are achieved with the housing design and the special process steps during the ferrite manufacture. The special snap lock makes the ferrite sleeve suitable for use with a variety of cable diameters and once the split ferrite is locked it cannot be opened accidentally.The outer housing is designed to protect the halves of the core from breakage and ensures simple assembly on to cables that are already installed or which have been fitted with connectors. Fixing to the cable with glue or cable tie is optional. Typical applications for these split ferrite cores include data or power lines used in computer technology, terminals, industrial controllers, medical engineering and office machines.

Related links