Mersen, formerly Ferraz Shawmut, is an expert in the safety and reliability of electrical equipment offering global electrical protection solutions such as fuses, fuse holders, fuse blocks, switches, surge protection devices, and related accessories. Mersen provides comprehensive circuit protection products and solutions for electrical industry, OEM designers, plant electrical professionals, electrical contractors and specifying engineers.
Class CC Fuses
ATDR - Class CC - Time-Delay: Amp-Trap 2000 time-delay ATDR small-dimension fuses provide IEC Type 2 "no damage" protection to your facility's increasingly sensitive branch circuit components and small motors - minimizing the risk of fault-related damage. ATDR Class CC fuses deliver the best time-delay characteristics in their class with excellent cycling ability for small motor loads.
ATQR - Class CC - Time-Delay: ATQR small-dimension fuses feature time-delay characteristics ideally suited for the high inrush currents of control transformers, solenoids, and similar inductive loads. Mersen’s Amp-Trap 2000 ATQR fuses provide superior protection for the branch circuits of electrical distribution systems.
ATMR - Class CC - Fast-Acting: Amp-Trap ATMR fast-acting fuses are the smallest dimension 600V fuses suitable for branch-circuit protection. The ATMR is a popular choice for economical protection of control circuits and control circuit transformers where available short circuit currents exceed 10,000 amperes. ATMR's rejection dimensions prevent substitution by lesser rated fuses. These fast-acting fuses give current-limiting protection to general circuits.
Class J Fuses
AJT - Class J - Time-Delay: Amp-Trap 2000 time-delay AJT fuses provide IEC Type "2" (No Damage) protection to main, feeder, and branch-circuits, for all types of loads - yet, they require only half the mounting space needed for 600V UL Class RK fuses. Time-delay characteristics handle motor in-rush currents without nuisance trips. Its current-limiting ability and wide range of ratings provide excellent overcurrent protection for all your applications. An optional mechanical blown fuse indicator and Microswitch is available on blade-type (70 to 600A) fuses for visual and/or remote blown fuse indication.
Class R Fuses
A6D-R - Class RK1 - Time-Delay: Amp-Trap 2000 SmartSpot time-delay A6D-R fuses provide IEC Type 2 "no damage" protection to existing mains, feeders, and branch circuits serving motor and non-motor loads. A6D-R fuses will open fast enough under extreme fault conditions for maximum short circuit protection to prevent damage to motor starters, switches, and other circuit components, yet also provide the time-delay needed for motor in-rush currents. A6D-R fuses can be used to replace obsolete 600V Class H, K or RK5 fuses already installed in the field.
- Literature Library
Need more information about Mersen products or guidance on electrical protection applications? Download these brochures and reference materials or request that copies be mailed to you.
- Product Selector Tools
With Mersen's online Product Selector Tools, you can quickly and accurately choose the right overcurrent fuse protection, surge protection device (SPD), or switch for your equipment. Learn more.
- Training Videos
Access Mersen's online library of videos on a wide variety of topics.