DUO core is the newest type of Unicore. It is a low loss, price competitive core with very easy assembly. It is used for core-type, single-leg and shell-type, single and 2-Phase General Purpose Transformers.
To reduce assembly time, the number of laminations per overlap may be increased from 1 up to 3. Increasing from 1 to 2 results in a 45% decrease in assembly time, and 2 to 3 results in a further 25% decrease