I am building a liquid dispenser system comprised of arduino, dc motor (6V 200mA), 2n2222 transistor, float switch. All these are powered by a regular 5V 1A DC adapter (off the shelf). Do the DC adapters ( made in china) offer surge protection ? If not, how I do implement surge protection ?
I already have a 250V 1amp glass fuse and IN4001 connected (to prevent circuit damage due to reverse polarity connection of adapter) as per the image attached below. (Adapter +ve and -ve connected to P5 screw connector pins 1 and 2).

I already have a 250V 1amp glass fuse and IN4001 connected (to prevent circuit damage due to reverse polarity connection of adapter) as per the image attached below. (Adapter +ve and -ve connected to P5 screw connector pins 1 and 2).
