RS Breadboard Power Block. This Power Block is specially designed for use with the AD Series Breadboards available from RS. The Model AD-10 Power Block provides a great, value for money option for prototyping and testing of electronic or computer circuits. Features:. 5 interconnected, individual banana/pin jack adaptors for easy connection RoHS Compliant. Suitable connections:. 4.5 mm Y-terminal 4 mm Banana plug Stripped wire