This charger has an input power limit, to reduce the stress on the input fuse and wiring. It also has current limiting circuitry to limit the amount of power fed into a faulty load. The adapter has a short delay to allow it to operate through a momentary fault or current pulse. If the overload persists, the unit will turn the output off, wait 10 seconds and try to restart. If the fault is still present it will repeat this step.
If the adapter gets too hot, it will automatically shut down to prevent damage to itself and stay off until it has cooled down to a safe temperature and then automatically restart.
Also has an LED indicator, that is lit when the output voltage is present.