no A FRN fuse is a slow blow fuse where an non is a fast blow fuse. In a pinch a slow blow fuse can be use in a fast blow circuit but not the other way around.
It depends on the precise type of slow blow fuse, but in general terms a fuse with a slow blow characteristic will take longer to operate (blow) at high overload currents than one with a normal characteristic. For low overload currents it will operate in about the same time as a normal fuse.
If the fuse is labelled F it is fast-blow or T OR S it is slow-blow, the letter should be on the metal cap on the ends of the fuse.
The fast blow fuse will generally only have a straight wire between the terminals, while the slow blow version will have part of that wire coiled up as a spring.
another name could be "dual-element fuse" as these are the slow-blow type.
The time it takes for a fuse to blow, either "fast blow" or "slow blow" is determined by the design of the fuse and is described in a table or graph provided by the manufacturer. In general, the higher the applied overload current, the faster the fuse will blow. Fast blow fuses can open in milliseconds, slow blow fuses can open in several seconds. The fuse used depends entirely on the application and what kind of circuit it is protecting.
slow
Slow burning fuse usually to alot time to evacuate an area
Any piece of machinery that is designed to use a fast blow fuse should only use a fast blow fuse. For safety reasons this could save your life instead of taking it.
It should be a 1.25 amp (1250ma) "slow-blow" fuse.
A T5AL is a tubular 5 amp 20mm x 5mm Slow Blow Anti Surge glass fuse.
The letters in T6.3AL250V typically refer to the electrical characteristics of a fuse. T indicates it is a time-delay (slow-blow) fuse. 6.3A specifies the current rating, meaning the fuse will blow if the current exceeds 6.3 amps. 250V indicates the maximum voltage the fuse is designed to protect against.