NEW YORK (Reuters) - Tyco International Ltd. said it filed a statement with the US Securities and Exchange Commission to register the $4.5 billion of convertible bonds it sold in January.

The Pembroke, Bermuda-based conglomerate said the filing covers its $3 billion of 2.75 percent senior bonds maturing in 2018 and its $1.5 billion of 3.125 percent senior bonds maturing in 2023. It sold the bonds in part to refinance debt maturing this year, and help avert a potential year-end liquidity crunch.

Tyco said the registration statement has yet to become effective.