Mersen Amp-Trap 2000 Class RK1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$120.00
Mersen Amp-Trap 2000 Class RK1 Time-Delay Fuse, 600VAC/600VDC, SmartSpot

Mersen Amp-Trap 2000 Class RK1 Time-Delay Fuse, 600VAC/600VDC, SmartSpot

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Model: A6D40R

In Stock (leaves warehouse same day if ordered before 3pm ET)

$120.00
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Mersen Amp-Trap 2000 Class RK1 Time-Delay Fuse, 600VAC/600VDC, SmartSpot

The Mersen Amp-Trap 2000 is a Class RK1 time-delay fuse rated 600VAC/600VDC, engineered for demanding industrial and commercial circuit protection and available across a range of amperage ratings to match specific circuit needs. It combines ferrule terminals with tin-plated copper contacts, PolyTube insulating body construction, and an integrated SmartSpot® indication system that gives technicians a fast visual check of fuse condition. With a 200 kA breaking capacity and time-delay response, this fuse is engineered to ride through momentary overloads while clearing fault currents quickly and reliably.

Key Features

  • Dual Voltage Capability (600VAC/600VDC): Protects both AC and DC systems, reducing inventory requirements and installation complexity.
  • Class RK1 Performance: Superior current-limiting characteristics and high interrupting capacity for enhanced system protection.
  • SmartSpot® Indication System: Visual status indication eliminates guesswork during troubleshooting and reduces maintenance time.
  • 200 kA Breaking Capacity: Exceptional fault-current interruption capability ensures reliable protection under severe fault conditions.
  • Time-Delay Characteristics: Allows temporary overloads while providing fast response to short circuits, ideal for motor and transformer applications.
  • Ferrule Terminal Design: Tin-plated copper terminals ensure secure, reliable electrical contact and corrosion resistance.
  • PolyTube Body Construction: Durable insulating material supports consistent performance across the fuse's rated voltage range.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Motor Control Centers and Variable Frequency Drives
  • Transformer Primary Protection
  • Industrial Control Panels and Switchgear
  • Commercial HVAC Systems
  • Manufacturing Equipment Protection
  • Power Distribution and Emergency Power/UPS Systems

Why Mersen?

Mersen Amp-Trap 2000 fuses deliver proven reliability with advanced SmartSpot® indication technology and robust PolyTube construction. The Class RK1 rating, 200 kA breaking capacity, and dual-voltage (600VAC/600VDC) time-delay design give electrical professionals dependable, code-conscious circuit protection for motor, transformer, and switchgear applications where downtime is not an option.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Product Type:
Time-Delay Fuse
Voltage Rating:
600VAC/600VDC
Series:
Amp-Trap 2000
Standards:
Class RK1
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuses

Mersen A6D40R – Frequently Asked Questions

1) Can a Mersen Amp-Trap 2000 RK1 fuse be used on a 600V DC circuit, not just AC?
Yes. The Amp-Trap 2000 Class RK1 time-delay fuse carries a dual rating of 600VAC/600VDC, so the same part protects AC feeders and DC circuits such as drive DC links or battery/UPS systems. That dual rating is why many shops stock one fuse instead of separate AC and DC types.
2) Will a Class RK1 fuse drop into my existing Class R fuse clips and rejection kit?
Yes. Class RK1 is a Class R form factor, so the Amp-Trap 2000 fits standard Class R fuse blocks and switches fitted with rejection hardware. Rejection clips will accept an RK1 but block non-rejection Class H/K fuses, which is the point of the rejection feature. Note that RK1 and RK5 share the same dimensions, so an RK1 can replace an RK5 in the same holder at the same amp rating, but an RK5 should not be substituted back in where RK1 current limitation was specified.
3) Will a time-delay RK1 fuse hold through motor inrush without nuisance blowing?
That is what the time-delay element is for. The Amp-Trap 2000 RK1 rides through momentary overloads like motor starting inrush and transformer magnetizing current, then clears short circuits fast. It is the usual choice ahead of motor control centers, VFDs, transformer primaries, and HVAC equipment. If you need a fast-acting fuse instead for a non-inrush load, that is a different curve entirely.
4) For a 40A motor branch circuit, what is the difference between the Mersen A6D40R and the Littelfuse CCMR Class CC fuse?
Both carry time-delay characteristics suited to motor starting inrush. The Mersen Amp-Trap 2000 A6D40R is a Class RK1 fuse rated for 600VAC and 600VDC with SmartSpot visual blown-fuse indication and a 200 kA breaking capacity, and it uses a full-size R-class ferrule body. The Littelfuse CCMR040 is a Class CC time-delay fuse in the compact midget format, which is common in control panels where panel space is tight. The deciding factor is usually the fuse block and disconnect already specified on the drawing.
5) Is a Littelfuse CCMR040 a drop-in replacement for a 40A Amp-Trap 2000 A6D40R?
No. Both are 40A time-delay fuses, but they are different fuse classes with different bodies and holders. The Mersen A6D40R is a Class RK1 fuse rated 600VAC/600VDC with ferrule terminals, while the Littelfuse CCMR040 is a Class CC time-delay fuse. Class CC is a midget-dimension fuse and will not seat in an R-class fuse block, and R-class will not seat in a CC clip. Match the fuse class to the block already in the panel, or change the block to suit.
6) Can I use a Littelfuse BLF midget fuse in place of an Amp-Trap 2000 RK1 fuse?
No. The Littelfuse BLF is a midget fast-acting fuse rated 250V in a laminated tube body, so it is neither the same physical format nor the same voltage class as the Mersen Amp-Trap 2000, which is a Class RK1 time-delay fuse rated 600VAC/600VDC. A fast-acting fuse will also open on the inrush that a time-delay fuse is meant to ride through, so it is not a substitute on motor or transformer circuits.
7) What amperage ratings does the Mersen A6D Amp-Trap 2000 RK1 fuse come in?
The A6D ferrule-style Amp-Trap 2000 RK1 is offered at 40A (part number A6D40R) and 400A (part number A6D400R). Pick the rating to match the circuit or motor overcurrent protection called out on your one-line or panel schedule.
8) How do I tell if a Mersen Amp-Trap 2000 fuse is blown without pulling it and testing?
These fuses carry the SmartSpot indication system, a visual indicator on the fuse that shows condition at a glance. For maintenance crews troubleshooting a dead leg in a motor control center, that means checking the spot rather than de-energizing and ringing out each fuse.
9) Can I use a glass tube fuse instead of a Class RK1 fuse in an industrial panel?
No. Glass-tube fuses like the Littelfuse AGA and AGU series are low-voltage automotive and electronics fuses, not 600V industrial overcurrent devices. For a motor control center, transformer primary, or switchgear application at 600VAC/600VDC with high available fault current, you need the Class R fuse. The Amp-Trap 2000 RK1 is the correct class there.
10) Do I need one fuse or three for a three-phase motor circuit?
Three, one per ungrounded phase conductor. The Amp-Trap 2000 RK1 is sold as an individual fuse by amperage, so a three-phase 40A circuit takes three A6D40R. Order in multiples of three and keep a spare set on the shelf for the same rating.
11) Would a Littelfuse AGU or AGA glass fuse work for a 400A feeder instead of the A6D400R?
No. The Littelfuse AGU and AGA series are small glass tube fuses, the AGA5 being a 5A device, and they are intended for low-current electronic and automotive-style circuits. The Mersen Amp-Trap 2000 A6D400R is a 400A Class RK1 power fuse rated 600VAC/600VDC with a 200 kA breaking capacity for feeders, switchgear, and motor control centers. Glass fuses have no place on a power feeder of that size.
How fast can I get the Mersen A6D40R delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Mersen A6D40R come with a warranty?
Absolutely. The Mersen A6D40R is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Mersen A6D40R?
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