The ornamental design for a currenttransducer, as shown and described.
1. Current transducer
1.1 : Perspective
1.2 : Perspective
1.3 : Front
1.4 : Back
1.5 : Top
1.6 : Bottom
1.7 : Left
1.8 : Right
The current transducer is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.