A4J25 - 25 Amp Fuse

A4J25 - 25 Amp Fuse

The Mersen A4J25 Amp-Trap® Class J Fast-Acting Fuse is designed to help protect your electrical systems from overloads and short circuits in commercial and industrial applications. Rated at 25 Amps, this fuse opens quickly during fault conditions to help reduce damage to connected equipment and keep your electrical systems operating safely. It’s a common choice for applications where fast fault clearing and dependable circuit protection are needed.

The A4J25 is part of Mersen’s Amp-Trap® A4J series and features a compact Class J design that helps prevent lower-rated fuses from being installed accidentally. That can help improve system safety and maintain proper protection levels. Its ferrule-style terminals provide secure clip mounting, while the PolyTube insulating body and tin-plated copper terminals are designed for reliable everyday performance.

Rated for both 600VAC and 300VDC systems, the A4J25 works well in a variety of power distribution and equipment protection applications. The high 200 kA interrupting rating allows it to handle high available fault currents while helping protect electrical components from unnecessary damage.

Key Features and Benefits

• 25 Amp Class J fast-acting fuse: Designed for dependable overcurrent protection.
• Quickly clears overloads and short circuits: Helps reduce damage to connected equipment.
• Current-limiting protection: Helps reduce equipment damage.
• Rated for 600VAC and 300VDC applications: Suitable for AC and DC electrical systems.
• High 200 kA interrupting rating: Designed for demanding fault current conditions.
• Compact Class J design: Helps prevent incorrect fuse replacement.
• Ferrule terminals: Provide secure clip mounting.
• Suitable for AC and DC electrical systems: Designed for commercial and industrial applications.
• Commercial and industrial compatibility: Suitable for demanding electrical environments.
• Improves system protection and reduces downtime: Supports dependable electrical system performance.
  

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A4J25
  
• Series: Amp-Trap® A4J
  
• Fuse Class: Class J
  
• Fuse Type: Fast-Acting
  
• Ampere Rating: 25A
  
• AC Voltage Rating: 600VAC
  
• DC Voltage Rating: 300VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200 kA AC
  
• Terminal Type: Ferrule
  
• Mounting: Clip
  
• Terminal Material: Tin-Plated Copper
  
• Body Material: PolyTube
  
• Diameter: 20.7 mm
  
• Length: 57.2 mm
  
• Product Weight: 0.044 kg
  
• Product Group: Low Voltage UL/CSA Fuses
  
• Compliance: RoHS Compliant
  

Material Compliance and Certifications

• RoHS Compliant: The Mersen A4J25 fuse is RoHS compliant, supporting environmental standards for electrical components used in commercial and industrial systems.
• UL and CSA Applications: It is manufactured for low-voltage UL and CSA fuse applications requiring dependable overcurrent protection.
  

Where It Works Best

• The A4J25 is commonly used in applications that require fast fault clearing and reliable circuit protection, including industrial control panels, HVAC systems, branch circuit protection, manufacturing equipment, commercial electrical systems, power distribution equipment, motor and control circuits, OEM machinery, and switchgear and panelboards.