U ovom kontekstu treba napraviti razliku između fuse (ili melting fuse) i "circuit breaker" = "automatski osigurač" koji se spominju u istoj rečenici, oba su od po 10 A i imaju potpuno istu ulogu.

http://en.wikipedia.org/wiki/Fuse_(electrical)
In electronics and electrical engineering a fuse (from the Latin "fusus" meaning to melt) is a type of sacrificial overcurrent protection device. Its essential component is a metal wire or strip that melts when too much
current flows, which interrupts the circuit in which it is connected.

http://www.google.com/search?q=topljivi osigurač&ie=utf-8&oe...

http://en.wikipedia.org/wiki/Circuit_breaker
A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and, by interrupting continuity, to immediately discontinue electrical flow. Unlike a fuse, which operates once and then has to be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Circuit breakers are made in varying sizes, from small devices that protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.

http://hr.wikibooks.org/wiki/Knjiga_pojmova_u_zrakoplovstvu/...
Circuit breaker –automatski osigurač. Strujni osigurač koji otvara strujni krug kada dođe do njegovog preopterećenja. Pritiskom na osigurač strujni krug se može ponovno zatvoriti.

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Note added at 1 day21 hrs (2011-01-29 10:14:21 GMT)
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Suština je u tome da se uređaj mora zaštititi bilo topljivim ili automatskim osiguračem od najmanje 10A.