What does H mean on a fuse?
What does H mean on a fuse?
A UL Class H fuse is a non-current limiting fuse that is rated to interrupt a minimum of 10,000 amps. The Class H fuse is a one-time fuse that does not have any appreciable degree of time delay. Class H fuses are rated at either 250 volts AC or 600 volts.
What are Class H fuses used for?
Non-current limiting, renewable 250V (REN) and 600V (RES) Class H size fuses and fuse links (250V LKN and 600V LKS) for use in electrical systems where the available fault current is less than 10,000 amps and frequent outages dictate the economy of these renewable type fuses.
What amp fuse do I need for microwave?
Our countertop and over-the-range microwaves: Require a 120 volt individual, properly grounded branch circuit with a 3 prong grounding type receptacle, protected by a 15 or 20 amp circuit breaker or time-delay fuse.
Can you replace a 15 amp fuse with a 20 amp fuse?
The answer: It’s possible, but not advisable without an electrician evaluating the situation. You should never just upgrade from a 15-amp breaker to a 20-amp one just because the current one is tripping. Otherwise, you may burn your house down via electrical fire.
How big is a GMA fast blow fuse?
GMA fuses are smaller European fuses, fast blow, 5mm diameter x 20mm long. Measure your old fuse. In English dimensions, they are about 3/16 inches x 3/4 inches.
How big is a 2AG pigtail circuit fuse?
2AG Pigtail fuses are subminiature 5mm diameter x 15mm long, with axial leads for soldering. Measure your old fuse. These pigtail fuses are designed to be soldered to a circuit board. In English dimensions, they are about 3/16 inches x 9/16 inches. 1 amp slow-blow.
How is the power dissipation of a fuse determined?
The short-circuit current (maximum fault current) to be interrupted by the fuse links at the rated voltage under default conditions must not be higher than the current corresponding to the breaking capacity of the fuse link. The maximum power dissipation (P V) is determined at a load with rated current, after having obtained temperature equilibrum.
When did they start making low amperage fuses?
By 1904, Underwriters Laboratories had established size and rating specifications to meet safety standards. The renewable type fuses and automotive fuses appeared in 1914, and in 1927 Littelfuse started making very low amperage fuses for the budding electronics industry.