The best high quality replacement for the 7805 5V 1A voltage regulator in ZX80, ZX81, ZX Spectrum 16K and 48K.
Pin compatible with the 7805.
Has a smaller footprint than the 7805, so fits at the location of the 7805 without any problem.
Offers the same power output as the standard 7805: 1A.
No heat, so no heatsink required.
Will increase the lifetime of your computer!
Photo shows the 7805 for reference as well: