Overview
The Mersen ATDR2 is a Class CC time delay fuse from the Amp-Trap 2000 series, rated for 2A at 600VAC/300VDC. The 2A 600V time-delay Class CC fuse provides IEC Type 2 no-damage protection for sensitive circuits and small motors. These small-dimension cartridge fuses are designed for industrial branch circuits where transient motor inrush currents require tolerance without nuisance opening. This lot includes two tested fuses suitable for replacement, repair, or spare inventory in motor control cabinets, contactors, and distributed electrical panels.
Key Features
- ATDR Class CC fuses deliver the best time-delay characteristics in their class with excellent cycling ability for small motor loads.
- Enhanced resistance to cyclical loads for frequent motor stops, avoiding unnecessary fuse operation.
- Rejection system to prevent replacement errors (when used with recommended fuse holders).
- Fiberglass body ensures dimensional stability in harsh industrial environments.
- High-quality silica sand provides fast arc quenching and limits high fault currents.
- Laser-etched manufacturing date and catalog number for long-lasting identification.
Technical Specifications
- Voltage Rating: 600VAC / 300VDC
- Current Rating: 2 Amperes
- Fuse Class: Class CC (small-dimension cartridge)
- Time-Delay Type: Time-Delay (slow-blow)
- Breaking Capacity: 200 kA AC / 100 kA DC
- Body Material: Fiberglass (GMG)
- Terminal Material: Tin-plated copper ferrule
- Physical Length: 1.5 inches (38.1 mm)
- Physical Diameter: 0.41 inches
- Weight per Unit: 0.017 lb
- Frequency: 50/60 Hz
- Mounting: Clip-style in Class CC fuse holders
- Standards Compliance: UL 248-4, CSA C22.2 No. 248.4, IEC Type 2
Typical Applications
The Mersen ATDR2 is widely used in industrial and commercial electrical systems where:
- Small motor protection with soft-start or frequent cycling (pump motors, fans, compressors)
- Lighting and heating circuits requiring transient overcurrent tolerance
- Branch circuit protection in control cabinets and distribution panels
- Contactor and magnetic starter circuits
- Sensitive electronic loads where nuisance fuse operation must be minimized
Compatibility & Replacements
Compatible With
- Class CC fuse holders and sockets (all standard configurations)
- Ferraz Shawmut Ultrasafe modular fuse modules (up to 30A max rating)
- Generic Class CC fuse clips and cartridge holders rated 600VAC/DC
- Industrial control systems and motor starters requiring Class CC protection
- NEMA and IEC-compliant branch circuit protection schemes
Replaces / Drop-In Replacement For
- Earlier Mersen ATDR2 (Ferraz Shawmut) production runs
- OEM-specified Class CC 2A 600V time-delay fuses in legacy equipment
- Any Class CC fuse cartridge rated 2A 600VAC/300VDC with 1.5″ length and 0.41″ diameter
Works With
- Ferraz Shawmut and Mersen Class CC fuse blocks and modules
- Distributed power systems operating at 50–60 Hz
- Motor control centers (MCCs) and industrial distribution panels
- UL 248-4 compliant motor protection circuits
- Any Class CC rejection-style fuse holder meeting CSA C22.2 No. 248.4
