Type reference for Littelfuse 242 series fuse - Important Notice

Type reference for Littelfuse 242 series fuse - Important Notice

Manufacturers using the Littelfuse 242.050 (50 mA) fuses in their equipment are advised that, due to the introduction of an alternative construction, the type reference of the sand filled 242.050 fuses now carry the suffix ‘S’.

For intrinsically safe products utilising the 242.050 fuse, manufacturers are required to specify the suffix ‘S’ type as this is identical to the type originally examined under their certification. Sira shall require its client to cease to use the non-sand-filled fuse and instead use 242.050 fuses with the S suffix.

It is not necessary to obtain a variation certificate for existing products as the suffix is additional to the existing type reference specified on the documentation. The change to the type reference can be added when convenient. New projects should specify the 242.050 with the S suffix.

If you have any questions over the above, please contact Sira:

Tel: +44 (0)1244 670 900
Email: info@siracertification.com