Mersen A3T1200 Class T Fast-Acting Current Limiting Fuse – 1200A – 300VAC/160VDC – Amp-Trap® Series

The Mersen A3T1200 is a high-performance Amp-Trap® Class T fast-acting fuse designed for extremely fast short-circuit protection in low-voltage industrial power systems. Rated at 1200 Amps, this current-limiting fuse provides ultra-fast interruption of fault currents, helping protect sensitive equipment, bus systems, and power distribution assemblies. With voltage ratings of 300VAC and 160VDC, it is widely used in applications requiring compact, high-interrupting protection with minimal let-through energy.

Voltage and Rating

• Current Rating: 1200 Amps
• Voltage Rating: 300VAC / 160VDC
• Frequency: 50/60 Hz
• Fuse Class: Class T
• Fuse Type: Fast-Acting, Current-Limiting

Key Specifications

• Product Type: Industrial Power Fuse
• Series: Amp-Trap® A3T
• Part Number: A3T1200
• Manufacturer: Mersen / Ferraz Shawmut
• Mounting Style: Blade
• Response Type: Fast-Acting
• Current Limiting: Yes (ultra-high speed interruption)

Technical Specifications

• Protection Type: Short-circuit and high-fault current protection
• Applications Suitability: Bus protection, UPS systems, battery systems, inverters, and critical distribution equipment
• Inrush Handling: Not time-delay—designed for fast fault clearing
• Construction Features: Compact design, high interrupting capacity, low let-through energy
• Coordination Type: Selective protection in high-speed systems

Standards and Approvals

• UL Listed
• CSA Certified
• Designed to meet Class T fuse protection requirements

Product Data

• Manufacturer: Mersen / Ferraz Shawmut
• Series: Amp-Trap® A3T
• Part Number: A3T1200
• EAN/UPC: 782001890841

Applications

• UPS systems
• Battery energy storage systems (BESS)
• Inverters and DC power systems
• Critical industrial power distribution
• Busbar and panel protection
• High-energy fault current protection systems
• Sensitive electronic equipment protection
• Industrial automation and control systems

Returns are easy

You may return items within 30 days of delivery for a refund.

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