Mersen Class RK1 Time-Delay Fuse 400A 250VAC/250VDC with SmartSpot Indication System

Mersen Class RK1 Time-Delay Fuse 400A 250VAC/250VDC with SmartSpot Indication System

Professional Circuit Protection with Advanced Indication Technology

The Mersen Class RK1 Time-Delay Fuse delivers reliable circuit protection for demanding electrical applications. Rated for 400A at 250VAC/250VDC, this professional-grade fuse features SmartSpot indication technology for quick visual status verification. Built with PolyTube insulating material and tin-plated copper blade terminals, it provides dependable performance in both AC and DC applications with clip mounting for secure installation.

Professional Features & Benefits

• 400A Current Rating: Handles high-amperage loads with reliable overcurrent protection for demanding electrical systems.
• Class RK1 Performance: Provides superior current-limiting characteristics and coordination with downstream protective devices.
• SmartSpot Indication System: Enables quick visual identification of fuse status, reducing troubleshooting time and improving maintenance efficiency.
• Time-Delay Characteristics: Allows temporary overloads while providing fast response to fault conditions, ideal for motor and transformer applications.
• 200 kA Breaking Capacity: Delivers exceptional fault current interruption capability for high-energy electrical systems.
• Dual Voltage Rating: Supports both 250VAC and 250VDC applications, providing versatility across various electrical configurations.
• Blade Terminal Design: Ensures secure connection with tin-plated copper terminals for reliable electrical contact and corrosion resistance.

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 RK1
• Indication System: Yes
• Indication System Type: SmartSpot�
• 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 Power Distribution Systems
• Manufacturing Equipment Protection
• HVAC System Circuit Protection
• Data Center Power Infrastructure
• Process Control Equipment
• Emergency Power Systems

Why Choose Mersen Quality?

Mersen fuses deliver proven reliability with RoHS compliance and professional-grade construction. The PolyTube insulating material and tin-plated copper terminals ensure long-term performance, while the SmartSpot indication system provides enhanced operational visibility for professional electrical installations.