A2D250R - 250 Amp Fuse Description
A2D250R - 250 Amp Fuse
When your electrical systems are exposed to demanding loads and sudden fault conditions, dependable circuit protection matters. The Mersen A2D250R Amp-Trap® 2000® Class RK1 Time-Delay Fuse is built to help keep industrial and commercial systems running safely while protecting valuable equipment from costly damage. Designed for motors, feeders, branch circuits, and other heavy-duty electrical applications, this 250A fuse delivers the fast-acting short-circuit protection facilities rely on, while still allowing the temporary inrush currents common during motor startup. That balance helps reduce nuisance openings without sacrificing protection.
What makes the A2D250R especially useful in the field is its combination of high interrupting capacity and time-delay performance. Under severe fault conditions, the fuse reacts quickly to help safeguard motor starters, switches, and connected electrical components before damage can spread through the system. At the same time, the integrated SmartSpot® blown-fuse indicator makes maintenance easier by helping your technicians quickly identify when a fuse has opened. Its rugged PolyTube body and tin-plated copper blade terminals are designed for long-lasting performance in demanding electrical environments. For facilities replacing older Class H, K, or RK5 fuses, the Mersen A2D250R offers a modern, high-performance upgrade trusted across industrial power distribution systems.
Key Features and Benefits
- 250A Class RK1 time-delay fuse: Designed for advanced overcurrent and short-circuit protection.
- Dual-rated capability: Rated for both 250VAC and 250VDC applications.
- Reduced nuisance openings: Helps manage temporary motor startup currents safely.
- High interrupting capacity: 200 kA interrupting rating provides added protection during severe fault events.
- SmartSpot® indication system: Allows faster blown-fuse identification.
- Equipment protection: Helps protect motor starters, switches, feeders, and downstream electrical components.
- Retrofit compatibility: Compatible replacement for older Class H, K, and RK5 fuse installations.
- Blade-style terminals: Tin-plated copper construction supports reliable conductivity.
- Durable PolyTube body: Designed for industrial environments.
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ROHS compliant: Supports modern environmental and material standards.
Technical Specifications
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Manufacturer: Mersen
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Catalog Number: A2D250R
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Product Series: A2D-R Amp-Trap® 2000®
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Fuse Class: Class RK1
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Fuse Type: Time-Delay
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Ampere Rating: 250A
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Voltage Rating AC: 250VAC
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Voltage Rating DC: 250VDC
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Frequency: 50/60 Hz
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Interrupting Rating: 200 kA AC
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Connection Type: Blade
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Terminal Material: Tin-Plated Copper
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Mounting Type: Clip
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Indication System: SmartSpot®
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Body Material: PolyTube
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Product Length: 8.63 in
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Product Diameter: 2.06 in
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Product Weight: 1.64 lb
Material Compliance and Certifications
- ROHS Compliant: Supports modern environmental and material standards.
- Low Voltage UL/CSA applications: Designed for low voltage UL/CSA fuse applications.
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Industrial-grade construction: Manufactured to meet demanding industrial circuit protection requirements.
Where It Works Best
- Industrial power distribution systems
- Motor control centers (MCCs)
- HVAC equipment and compressor circuits
- Manufacturing and processing machinery
- Commercial electrical panels and switchgear
- Branch circuits and feeder protection
- Heavy-duty motor applications with high inrush currents
- Facilities upgrading older Class H, K, or RK5 fuse installations
- Control panels and industrial automation systems
- Electrical systems requiring dependable short-circuit and overload protection
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Specifications
- Width:2.0
- Depth:2.0
- Height:8.63
- Amperes:250
- A.I.C. Rating & Volts:200 kA @ 250 V.AC
- Type:A2D-R
- Additional Notes:Knife-Blade Style, Non-Indicating, Time-Delay, current-limiting Class R Fuse
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