This is the standard 1.2 amp replacement for the original transformer in all Scalextric conventional (non-digital) race sets with newer 2013-on power bases (C8530 and C8531 and Start set power base) that accept only transformers with a rectangular plug. It is not compatible with the earlier Sport power bases that accept a round controller plug, C8217 and C8241.
If your Scalextric analog power base has one wide flat jack in the center of the power base then it is compatible with the P9403 transformer.
NOT COMPATIBLE with Scalextric Digital
15VDC - 1.2A