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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$540.20
Mersen RFS90,,, UL Class H
$496.28
Mersen RFS80,,, UL Class H
$517.82
Mersen RFS70,,, UL Class H
$2685.98
Mersen RFS600,,, UL Class H
$160.80
Mersen RFS60,,, UL Class H
$149.78
Mersen RFS6,,, UL Class H
$2887.55
Mersen RFS500,,, UL Class H
$227.35
Mersen RFS50,,, UL Class H
$159.88
Mersen RFS5,,, UL Class H
$2887.55
Mersen RFS450,,, UL Class H
$237.37
Mersen RFS45,,, UL Class H
$1780.69
Mersen RFS400,,, UL Class H
$226.63
Mersen RFS40,,, UL Class H
$159.88
Mersen RFS4,,, UL Class H
$2022.79
Mersen RFS350,,, UL Class H
$226.63
Mersen RFS35,,, UL Class H
$2022.79
Mersen RFS300,,, UL Class H
$102.89
Mersen RFS30,,, UL Class H
$159.88
Mersen RFS3,,, UL Class H
$2022.79
Mersen RFS250,,, UL Class H
$144.28
Mersen RFS25,,, UL Class H
$2022.79
Mersen RFS225,,, UL Class H
$834.83
Mersen RFS200,,, UL Class H
$114.40
Mersen RFS20,,, UL Class H
$1003.19
Mersen RFS175,,, UL Class H
$961.53
Mersen RFS150,,, UL Class H
$134.67
Mersen RFS15,,, UL Class H
$1003.35
Mersen RFS125,,, UL Class H
$1003.19
Mersen RFS110,,, UL Class H
$367.64
Mersen RFS100,,, UL Class H
$148.20
Mersen RFS10,,, UL Class H
$257.33
Mersen RF90,,, UL Class H
$257.33
Mersen RF80,,, UL Class H
$257.13
Mersen RF70,,, UL Class H
$1528.89
Mersen RF600,,, UL Class H
$81.16
Mersen RF60,,, UL Class H
$57.11
Mersen RF6,,, UL Class H
$1594.91
Mersen RF500,,, UL Class H
$114.34
Mersen RF50,,, UL Class H
$63.60
Mersen RF5,,, UL Class H
$1594.91
Mersen RF450,,, UL Class H
$114.34
Mersen RF45,,, UL Class H
$710.73
Mersen RF400,,, UL Class H
$114.34
Mersen RF40,,, UL Class H
$66.38
Mersen RF4,,, UL Class H
$1044.20
Mersen RF350,,, UL Class H
$119.31
Mersen RF35,,, UL Class H
$1089.53
Mersen RF300,,, UL Class H