Mersen TR400R Class RK5 Time-Delay Fuse 400A 250VAC/250VDC Blade Terminal

Mersen TR400R Class RK5 Time-Delay Fuse 400A 250VAC/250VDC Blade Terminal

Professional Time-Delay Protection for High-Current Applications

The Mersen TR400R delivers reliable overcurrent protection with 400A capacity and dual voltage rating of 250VAC/250VDC. This Class RK5 time-delay fuse features blade terminal connections with tin-plated copper construction and PolyTube insulating material for dependable performance in demanding electrical systems. With 200 kA breaking capacity and clip mounting design, this fuse provides professional-grade protection for high-current circuits.

Professional Features & Benefits

• 400A Current Rating: Handles high-current loads with reliable overcurrent protection for demanding applications
• Class RK5 Time-Delay: Provides selective coordination and withstands temporary overloads while clearing sustained faults
• 250VAC/250VDC Dual Rating: Versatile voltage compatibility for both AC and DC electrical systems
• 200 kA Breaking Capacity: Superior fault interruption capability ensures safe circuit protection under high fault conditions
• Blade Terminal Design: Tin-plated copper terminals provide secure connections and resist corrosion
• PolyTube Construction: Durable insulating material ensures reliable performance and electrical isolation
• RoHS Compliant: Meets environmental standards for responsible electrical component manufacturing

Technical Specifications

• Ac Max I R Breaking Capacity I1: 200 kA
• Ac Or Dc: AC/DC
• Ampere Rating: 400 A
• Body Insulating Material: PolyTube
• Connection Terminal Material: Tin-Plated Copper
• Connection Terminal Type: Blade
• Frequency Hz : 50/60 Hz
• Fuse Class: Class RK5
• Mounting Method: Clip
• Product Length: 8.63 in
• Product Weight: 1.64 lb
• Rated Voltage Ac Ul: 250 V
• Rated Voltage Dc Ul: 250 V
• Rohs Compliant: Yes
• Speed Characteristic: Time Delay

Installation & Operation

1. Mount the unit in a suitable location with appropriate clearance and access for connections and service.
2. Connect utility and load conductors following applicable guidelines and the manufacturer's instructions.
3. Wire generator or power input according to the provided voltage/phase specifications and compatible capacity.
4. Configure any available load management or control features as supported by the provided specifications.
5. Test automatic transfer or operational functionality and verify proper performance before placing into service.
6. Complete final inspection and follow ongoing maintenance practices appropriate to the product category.

Professional Applications

• Industrial Motor Control Centers
• Commercial Electrical Distribution
• High-Current Feeder Protection
• Manufacturing Equipment Protection
• Power Distribution Systems
• Heavy-Duty Electrical Panels
• Critical Infrastructure Protection

Why Choose Mersen Quality?

Mersen delivers professional-grade electrical protection with RoHS compliant manufacturing and proven Class RK5 time-delay technology. The robust PolyTube construction and tin-plated copper terminals ensure long-term reliability in demanding electrical environments, providing the dependable overcurrent protection professionals trust.