20 p th p january 2010 to our valuable customers u temporary deviation: notification of removal of ul recognition mark on 154 series littelfuse inc., regrets to inform you that the nano 154 series omni-blok? products with manufacturing date code on or after nov 9, 2009 has been shipped incorrectly with the ul recognition logo on the product labels. as a result of a change by ul on the regulation of the plastic material used in the 154 series holder, the ul approval for this product has be en suspended temporarily. effective nov. 2009, ul has mandated that all plastic material used in fuseholders have certain flammability rating. previously, this was a requirement for fuses only and not the associated fuseholder. as a result, the fuseholder used in the 154 series omni-blok? was no longer ul approved and the ul recognition logo should have been remove d from all product labels with date code on or after nov 9, 2009. it is important to note that the performance and material of the product remain unchanged and that ul suspension is only applicable to the fuseholder. the 451/452/4 53/454 series fuse that is used in the 154 series omni -blok? remain ul approved. we are working on obtaining ul approval for th e 154 series omni-blok? with a new plastic material for the fuse holder. th e removal of ul rec ognition mark is a temporary deviation. we will implement the new plastic material and ap ply back the ul recognition mark on 154 series as soon as we get ul?s approval. we apologize in advance for any inconvenience that this has caused. please contact your local littelfuse representative if you have any additional questions. thank you for your continued support. best regards, matthew chan global product manager littelfuse hk, ltd. t. +852 2154-7777 f. +852 2810-5500 m. +852 9832-2309 h t u mchan@littelfuse.com u t h
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