Mersen AJT450 Fuse – Class J – 450A – 600VAC/500VDC – Time-Delay Blade Fuse (Amp-Trap 2000® AJT)

The Mersen AJT450 is a Class J time-delay fuse designed for high-capacity industrial power distribution systems. Rated at 450 Amps, this Amp-Trap 2000® fuse provides controlled time-delay performance, allowing it to withstand temporary inrush currents while still delivering fast and reliable interruption during short-circuit events. With voltage ratings of 600VAC and 500VDC, it is suitable for AC and DC systems requiring high interrupting capacity, compact design, and selective coordination protection.

Voltage and Rating

• Current Rating: 450 Amps
• Voltage Rating: 600VAC / 500VDC
• Frequency: 50/60 Hz
• Fuse Class: Class J
• Fuse Type: Time-Delay (Dual-Element)

Key Specifications

• Product Type: Industrial Time-Delay Fuse
• Series: Amp-Trap 2000® AJT
• Part Number: AJT450
• Manufacturer: Mersen
• Mounting Style: Blade
• Response Type: Time-delay for motor and inrush current tolerance
• Indicator: SmartSpot® blown-fuse indicator

Technical Specifications

• Protection Type: Overcurrent and short-circuit protection for industrial circuits
• Application Suitability: Motor circuits, transformers, feeders, and power distribution systems
• Coordination Type: Designed for selective coordination with downstream protection devices
• Construction Features: High interrupting capacity, current-limiting design, and controlled delay characteristics
• System Integration: Suitable for AC and DC systems up to rated voltage limits

Standards and Approvals

• UL Listed
• CSA Certified
• Class J fuse standard compliant
• IEC equivalent industrial protection standards (where applicable)

Product Data

• Manufacturer: Mersen
• Series: Amp-Trap 2000® AJT
• Part Number: AJT450
• EAN/UPC: 782001962180

Applications

• Motor control centers (MCCs)
• Industrial power distribution systems
• Transformer protection
• Feeder circuits and sub-feeders
• HVAC systems
• Heavy-duty machinery and industrial equipment
• Commercial and industrial electrical installations

Returns are easy

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

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