Mersen AJT250 Fuse – Class J – 250A – 600VAC/500VDC – Time-Delay Blade Fuse (Amp-Trap 2000® AJT)

The Mersen AJT250 is a Class J time-delay fuse engineered for high-reliability protection in industrial power distribution systems. Rated at 250 Amps, this Amp-Trap 2000® fuse provides controlled time-delay characteristics, allowing it to withstand temporary inrush currents while delivering fast and safe interruption under short-circuit conditions. With voltage ratings of 600VAC and 500VDC, it is designed for both AC and DC systems requiring high interrupting capacity, compact size, and selective coordination.

Voltage and Rating

• Current Rating: 250 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: AJT250
• Manufacturer: Mersen
• Mounting Style: Blade
• Response Type: Time-delay for 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 performance
• 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: AJT250
• EAN/UPC: 782001962265

Applications

• Motor control centers (MCCs)
• Industrial power distribution systems
• Transformer protection
• Feeder circuits and sub-feeders
• HVAC systems
• Pumps, compressors, and heavy-duty machinery
• Commercial and industrial installations
• Systems requiring inrush tolerance with high fault protection

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

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