Mersen AJT300 Class J Time-Delay Fuse 300A 600VAC/500VDC with SmartSpot Indication

Mersen AJT300 Class J Time-Delay Fuse 300A 600VAC/500VDC with SmartSpot Indication

Professional Class J Time-Delay Protection with Advanced Indication Technology

The Mersen AJT300 Class J Time-Delay Fuse delivers reliable overcurrent protection with 300A rating for both AC and DC applications. Featuring 600VAC/500VDC dual voltage capability and SmartSpot indication system, this blade-type fuse provides professional-grade protection with visual status monitoring. The GMG insulating material body and brass connection terminals ensure dependable performance in demanding electrical environments.

Professional Features & Benefits

• 300A Current Rating: Handles substantial electrical loads while providing precise overcurrent protection for critical circuits and equipment.
• Class J Time-Delay Design: Allows temporary overloads while quickly clearing dangerous fault conditions, protecting motors and other inductive loads.
• Dual Voltage Capability: 600VAC/500VDC rating provides versatility for both AC and DC applications in industrial and commercial systems.
• SmartSpot Indication System: Visual indication technology shows fuse status at a glance, reducing troubleshooting time and improving maintenance efficiency.
• 200kA Breaking Capacity: High interrupting rating safely clears severe fault currents, protecting downstream equipment and personnel.
• Blade Terminal Design: Brass blade terminals with clip or bolted mounting provide secure connections and flexible installation options.
• GMG Insulating Material: Advanced body material ensures reliable insulation and mechanical strength in demanding environments.

Technical Specifications

• Ac Max I R Breaking Capacity I1: 200 kA
• Ac Or Dc: AC/DC
• Ampere Rating: 300 A
• Body Insulating Material: GMG
• Connection Terminal Material: Brass
• Connection Terminal Type: Blade
• Frequency Hz : 50/60 Hz
• Fuse Class: Class J
• Indication System: Yes
• Indication System Type: SmartSpot�
• Mounting Method: Clip or Bolted
• Product Length: 7.13 in
• Product Weight: 1.79 lb
• Rated Voltage Ac Ul: 600 V
• Rated Voltage Dc Ul: 500 V
• Rohs Compliant: Yes
• Speed Characteristic: Time Delay

Installation & Operation

1. Mount the unit in a suitable location with appropriate clearance and access for connections and service.
2. Connect utility and load conductors following applicable guidelines and the manufacturer's instructions.
3. Wire generator or power input according to the provided voltage/phase specifications and compatible capacity.
4. Configure any available load management or control features as supported by the provided specifications.
5. Test automatic transfer or operational functionality and verify proper performance before placing into service.
6. Complete final inspection and follow ongoing maintenance practices appropriate to the product category.

Professional Applications

• Industrial Motor Control Centers and Distribution Panels
• Commercial HVAC and Lighting Systems
• Manufacturing Equipment Protection
• Data Center and Telecommunications Infrastructure
• Healthcare and Critical Facility Power Systems
• Renewable Energy and Battery Storage Systems
• Marine and Transportation Applications

Why Choose Mersen Quality?

Mersen delivers proven reliability with RoHS compliant construction and professional-grade materials. The SmartSpot indication system and robust GMG insulating material demonstrate Mersen's commitment to advanced protection technology and long-term performance in critical electrical applications.