Mersen ATDR Class CC Time-Dela...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$52.84
Mersen ATDR Class CC Time-Delay Fuse

Mersen ATDR Class CC Time-Delay Fuse

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Model: ATDR1-1/4

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

$52.84
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Mersen ATDR2-1/2 Class CC Time-Delay Fuse, 2.5A 600VAC/300VDC Ferrule Terminal

The Mersen ATDR2-1/2 is a Class CC Time-Delay Fuse from the Amp-Trap 2000 series, rated 2.5A with dual voltage capability of 600VAC/300VDC. Built with ferrule terminals and a GMG insulating body, this fuse delivers reliable overcurrent protection with a 200 kA breaking capacity for professional electrical applications. The time-delay characteristic protects motor starting currents and inductive loads while responding quickly to sustained overcurrents.

Key Features

  • 2.5A Current Rating: Provides precise overcurrent protection for sensitive circuits and equipment applications.
  • 600VAC/300VDC Dual Voltage: Versatile voltage compatibility supports both AC and DC circuit protection requirements.
  • 200 kA Breaking Capacity: Superior interrupting capability ensures safe fault current clearing in high-energy electrical systems.
  • Class CC Design: Compact form factor with standardized dimensions for reliable fit in compatible fuse holders and panels.
  • Time-Delay Characteristic: Enhanced protection for motor starting currents and inductive loads while maintaining fast response to sustained overcurrents.
  • Ferrule Terminal Construction: Tin-plated copper terminals provide secure electrical connections and corrosion resistance.
  • GMG Insulating Material: Professional-grade body construction ensures reliable insulation and mechanical durability.
  • Compact Footprint: 1.5 in length and 0.017 lb weight for easy installation in space-constrained panels.

Technical Specifications

  • Ac Max I R Breaking Capacity I1: 200 kA
  • Ac Or Dc: AC/DC
  • Ampere Rating: 2.5 A
  • Body Insulating Material: GMG
  • Connection Terminal Material: Tin-Plated Copper
  • Connection Terminal Type: Ferrule
  • Frequency Hz: 50/60 Hz
  • Fuse Class: Class CC
  • Mounting Method: Clip
  • Product Length: 1.5 in
  • Product Weight: 0.017 lb
  • Rated Voltage Ac Ul: 600 V
  • Rated Voltage Dc Ul: 300 V
  • Speed Characteristic: Time Delay

Typical Applications

  • Motor Control Centers and Variable Frequency Drives
  • Industrial Control Panels and Automation Systems
  • Commercial HVAC and Lighting Control Circuits
  • Process Control and Instrumentation Protection
  • Power Distribution and Branch Circuit Protection
  • Renewable Energy and Battery System Applications

Why Mersen?

Mersen Class CC fuses deliver proven reliability with professional-grade GMG insulating material and tin-plated copper ferrule terminals. The compact 1.5 in length and lightweight 0.017 lb design ensures easy installation while maintaining a superior 200 kA breaking capacity for demanding electrical protection applications across motor control, industrial automation, and power distribution systems.

Manufacturer Resources

Product Specs

Connection Terminal Material:
Tin-Plated Copper
Product Group:
Wiring Devices
Body Insulating Material:
GMG
Rated Voltage Ac Ul:
600 V
Frequency Hz:
50/60 Hz
Ac Max I R Breaking Capacity I1:
200 kA
Rated Voltage Dc Ul:
300 V
Fuse Class:
Class CC
Speed Characteristic:
Time Delay
Product Weight:
0.017 lb
Ac Or Dc:
AC/DC
Connection Terminal Type:
Ferrule
Department:
Electrical
Product Length:
1.5 in
Mounting Method:
Clip
Product Type:
Fuse

Mersen ATDR1-1/4 – Frequently Asked Questions

1) Will a Mersen ATDR fuse fit a standard Class CC fuse holder?
Yes. The ATDR is a Class CC fuse, which is a standardized 13/32 x 1-1/2 inch ferrule body, and the stated product length is 1.5 in. It drops into any Class CC rejection holder or clip-style block. The rejection feature means it will not seat in a midget-fuse holder that lacks Class CC prep, and a plain 13/32 x 1-1/2 midget fuse will not seat in a Class CC rejection holder either.
2) Can I use a Mersen ATDR Class CC fuse on a DC circuit, like a battery or solar system?
Yes, within limits. The ATDR is rated AC/DC: 600 V on AC and 300 V on DC. So a 300 VDC battery bank or PV string circuit is inside its rating, but a 600 VDC array is not. Don't carry the 600 V number over to the DC side, they are two different ratings.
3) Will a time-delay Class CC fuse hold up to motor inrush without nuisance blowing?
That is what the ATDR is built for. It is a time-delay characteristic, so it rides through the inrush of a motor start, a transformer energizing, or a contactor coil, then still opens on a sustained overload. If you are protecting a control transformer, a small motor, or a VFD input, this is the right speed. For a semiconductor or a purely resistive load where you want the fastest clearing possible, a fast-acting Class CC is the better pick instead.
4) Can I swap a Mersen ATDR into a panel that currently has another brand of Class CC time-delay fuse?
Class CC is a dimensionally standardized class, so any Class CC fuse of the same amp rating shares the 13/32 x 1-1/2 inch body and the same rejection prep, and the ATDR seats in the same clip. What you have to match is amp rating and speed: replacing a fast-acting Class CC with the time-delay ATDR changes the clearing curve, and replacing a time-delay with a fast-acting will nuisance-blow on motor inrush. Confirm the voltage of the circuit stays inside 600 VAC or 300 VDC.
5) Is the Square D PowerLogic energy meter fuse pack a substitute for a Mersen ATDR Class CC fuse?
No. The Square D PowerLogic pack is a set of three 0.5A 600V fuses sold for PowerLogic energy meter circuits, so it is a fixed three-piece metering kit at one amperage. The Mersen ATDR is a Class CC time-delay fuse rated 600V AC and 300V DC with ferrule terminals and clip mounting, ordered as single amperages from 0.5A up to 30A. If the drawing calls out Class CC branch or motor circuit protection, the ATDR is the part; the PowerLogic pack serves the meter it was built around.
6) What amp ratings does the Mersen ATDR come in?
Nineteen ratings, from 1/2 amp up to 30 amps: 0.5, 1, 1.25, 1.5, 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 20, 25 and 30 A. Part numbers follow the amperage directly, so 2.5 A is ATDR2-1/2, 1.25 A is ATDR1-1/4, and 30 A is ATDR30. Thirty amps is the ceiling on Class CC, so anything above that moves you to a different fuse class.
7) Is 200 kA interrupting rating enough for my industrial control panel?
The ATDR clears 200 kA on AC, which is the highest interrupting rating commonly available and covers essentially any available fault current you will see downstream of a service in a commercial or industrial building. It is also why Class CC fuses get used to establish a low let-through current ahead of control components with limited withstand ratings.
8) I need a 0.5 amp fuse for metering, should I buy the ATDR or a meter fuse pack?
Both routes exist at 1/2 amp. The ATDR1/2 is the individual Class CC time-delay fuse at 0.5 A, sold one at a time, which suits panel work where you are replacing one blown fuse or building a three-phase circuit yourself. The Square D PowerLogic Energy Meter Fuse Pack is a set of three 0.5 A 600 V fuses sold together for metering potential circuits, which is the tidier buy when you are fusing all three phases ahead of a PowerLogic meter at once.
9) Will a Class CC fuse fit where a 30 amp Class J or Class R fuse is now?
No. Class CC bodies are 13/32 x 1-1/2 inches and the ATDR measures 1.5 in long, which is far shorter than a Class J or Class R fuse of the same amp rating, and the holders are not interchangeable. If your existing block is Class J or Class R, order that class rather than a Class CC. Class CC is the right choice for compact control panel work where the block is built for it.
10) I need a 0.5A 600V fuse for a control panel - Mersen ATDR1/2 or the Square D PowerLogic fuse pack?
Both land at 0.5A and 600V, but they are built for different jobs. The Square D PowerLogic pack ships as a set of three and is matched to PowerLogic energy metering. The Mersen ATDR1/2 is a single Class CC time-delay fuse with a 200 kA AC breaking capacity, a 1.5 in ferrule body on tin-plated copper terminals, and a 300V DC rating alongside the 600V AC. For a Class CC clip holder in a control panel, order the ATDR1/2 and add pieces to match the number of poles you are protecting; the PowerLogic pack is bought as a three-fuse set for the meter it supports.
11) Does the Mersen ATDR work on 50 Hz equipment, not just 60 Hz?
Rated 50/60 Hz, so it is fine on imported machinery running 50 Hz as well as standard North American 60 Hz power. Useful if you are servicing an OEM machine built for a European or Asian supply.
12) What are the ATDR fuse terminals made of, and will they corrode in a damp panel?
The end ferrules are tin-plated copper. Tin plating on copper resists oxidation at the clip contact, which matters because a corroded ferrule raises contact resistance and heats the fuse clip. The body is GMG insulating material rather than glass, so it will not shatter when it clears a fault.
How fast can I get the Mersen ATDR1-1/4 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 ATDR1-1/4 come with a warranty?
Absolutely. The Mersen ATDR1-1/4 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 ATDR1-1/4?
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