A4BT1200 - 1200 Amp Fuse

A4BT1200 - 1200 Amp Fuse

When your electrical system demands serious overcurrent protection, the Mersen A4BT1200 Amp-Trap® Class L Time-Delay Fuse is built to deliver dependable performance where it matters most. Designed for high-capacity industrial and commercial power systems, this 1200A Class L fuse helps protect mains, feeders, transformers, and large motor loads from damaging overcurrents and short circuits. Its time-delay design allows equipment to handle normal startup surges and inrush currents without nuisance fuse openings, helping keep you operations running smoothly and reducing unnecessary downtime.

Whether you're maintaining a manufacturing facility, upgrading switchgear, or protecting large HVAC and motor-driven systems, this Amp-Trap® fuse provides the confidence and protection professionals expects.

Key Features and Benefits

• 1200 Amp Class L Fuse designed for heavy-duty commercial and industrial applications
• Time-delay protection helps prevent nuisance openings during motor startup and high inrush conditions
• 600VAC / 500VDC rating supports both AC and DC circuit protection needs
• 200kA interrupting rating helps defend equipment against severe fault currents
• Current-limiting construction reduces thermal and mechanical stress during short circuits
• Blade-style bolted terminals provide a secure, dependable electrical connection
• Silver-plated copper terminals enhance conductivity and corrosion resistance
• Allows 100% continuous loading under normal operating conditions
• Manufactured for long-lasting performance in demanding electrical environments

Technical Specifications

• Manufacturer: Mersen
  
• Catalog Number: A4BT1200
  
• Product Series: A4BT – Amp-Trap®
  
• Fuse Class: Class L
  
• Fuse Type: Time-Delay
  
• Ampere Rating: 1200A
  
• Voltage Rating AC: 600VAC
  
• Voltage Rating DC: 500VDC
  
• Frequency: 50/60 Hz
  
• Interrupting Rating: 200kA AC
  
• Connection Type: Blade
  
• Mounting Style: Bolted
  
• Terminal Material: Silver-Plated Copper
  
• Insulating Material: GMG
  
• Product Length: 273 mm
  
• Product Diameter: 63.5 mm
  
• Product Weight: 1.9368 kg
  
• UPC: 782001939939
  

Material Compliance and Certifications

• RoHS Compliant
• Designed for use in UL and CSA low-voltage fuse applications
• Built to meet demanding industrial electrical protection requirements
  

Where It Works Best

• Industrial manufacturing facilities
• Motor control centers and large motor systems
• Commercial power distribution equipment
• Switchgear and switchboards
• Service entrance and feeder protection
• HVAC systems with large startup loads
• Utility and infrastructure projects