Mersen Fuses

Mersen Class J time-delay fuses provide IEC Type 2 “no damage” protection to main, feeder and branch circuits, as well as protection for motor and transformer inrush currents. They are available with SmartSpot visual open fuse indicator.

Mersen Class L fuses are 20 percent more current limiting than any other Class L fuse on the market. The A4BQ fuses protect service entrance equipment and protect downstream circuit components against short-circuit let-thru current. A4BQ fuses’ built-in 4-second time-delay (at 500 percent of rated current) accommodates harmless in-rush currents with no nuisance opening. The A4BT fuses protect mains, feeders and general circuits. The 10-second time-delay (at 500 percent fuse rating) is ideal for large motors and other loads with high in-rush currents. 

Mersen Class K5 general purpose fuses provide low cost protection for feeder and branch circuits serving heating, lighting and other non-motor loads. They will safely interrupt available short-circuit currents up to 50,000 amperes in all ratings.

Mersen Class RK1 time-delay fuses provide IEC Type 2 “no damage” protection to mains, feeder and branch circuits serving motor and non-motor loads. They will open fast enough under extreme fault conditions for short-circuit protection to prevent damage to switches, motor starters and other circuit components, while still providing the time-delay needed for motor in-rush currents.

Mersen Class RK5 current-limiting time-delay fuses provide overcurrent protection for service entrance equipment, feeders, branch-circuits, motors and transformers. The time-delay safely handles harmless in-rush currents.

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$580.72
Mersen RFS90,,, UL Class H
$533.50
Mersen RFS80,,, UL Class H
$556.65
Mersen RFS70,,, UL Class H
$2887.43
Mersen RFS600,,, UL Class H
$172.86
Mersen RFS60,,, UL Class H
$161.01
Mersen RFS6,,, UL Class H
$3104.12
Mersen RFS500,,, UL Class H
$244.40
Mersen RFS50,,, UL Class H
$171.87
Mersen RFS5,,, UL Class H
$3104.12
Mersen RFS450,,, UL Class H
$255.18
Mersen RFS45,,, UL Class H
$1914.24
Mersen RFS400,,, UL Class H
$243.62
Mersen RFS40,,, UL Class H
$171.87
Mersen RFS4,,, UL Class H
$2174.49
Mersen RFS350,,, UL Class H
$243.62
Mersen RFS35,,, UL Class H
$2174.49
Mersen RFS300,,, UL Class H
$110.60
Mersen RFS30,,, UL Class H
$171.87
Mersen RFS3,,, UL Class H
$2174.49
Mersen RFS250,,, UL Class H
$155.10
Mersen RFS25,,, UL Class H
$2174.49
Mersen RFS225,,, UL Class H
$897.44
Mersen RFS200,,, UL Class H
$122.98
Mersen RFS20,,, UL Class H
$1078.43
Mersen RFS175,,, UL Class H
$1033.65
Mersen RFS150,,, UL Class H
$144.77
Mersen RFS15,,, UL Class H
$1078.60
Mersen RFS125,,, UL Class H
$1078.43
Mersen RFS110,,, UL Class H
$395.22
Mersen RFS100,,, UL Class H
$159.32
Mersen RFS10,,, UL Class H
$276.63
Mersen RF90,,, UL Class H
$276.63
Mersen RF80,,, UL Class H
$276.42
Mersen RF70,,, UL Class H
$1643.55
Mersen RF600,,, UL Class H
$87.24
Mersen RF60,,, UL Class H
$61.39
Mersen RF6,,, UL Class H
$1714.53
Mersen RF500,,, UL Class H
$122.92
Mersen RF50,,, UL Class H
$68.37
Mersen RF5,,, UL Class H
$1714.53
Mersen RF450,,, UL Class H
$122.92
Mersen RF45,,, UL Class H
$764.03
Mersen RF400,,, UL Class H
$122.92
Mersen RF40,,, UL Class H
$71.36
Mersen RF4,,, UL Class H
$1122.52
Mersen RF350,,, UL Class H
$128.26
Mersen RF35,,, UL Class H
$1171.25
Mersen RF300,,, UL Class H