Overview
The Mersen TRS1R is a Class RK5 time-delay fuse rated 1A at 600VAC/600VDC, part of the proven Tri-Onic® SmartSpot® TRS series. Designed for reliable overcurrent protection in industrial and commercial applications, this fuse safely protects motors, transformers, service entrance equipment, feeders, and branch circuits. The time-delay design accommodates harmless inrush and starting currents common in motor circuits while maintaining fast response to genuine faults.
Key Features
- Current-limiting design for rapid fault current suppression
- Time-delay characteristic handles motor starting currents without nuisance trips
- Class RK5 classification for use in circuits up to 200 kA interrupting rating
- Rated 1 ampere at 600 volts AC and DC
- Ferraz Shawmut/Mersen heritage—over 80 years of fuse manufacturing expertise
- Packaged new in box, tested and factory-sealed
Technical Specifications
Rated Current: 1A | Voltage Rating: 600VAC/600VDC | Class: RK5 Time-Delay | Interrupting Rating: 200 kA (AC) | Fuse Series: Tri-Onic TRS | Body Material: PolyTube | Agency Certifications: UL Listed, CSA Certified (C22.2 No. 198)
Typical Applications
- Motor circuit protection and branch-circuit overcurrent protection
- Transformer protection in power distribution
- Service entrance and feeder circuits
- HVAC and refrigeration equipment circuits
- Industrial control panels and switchboards
Compatibility & Replacements
Compatible With
- Standard North American fuse holders rated for 600V Class RK5 fuses
- Motor control centers (MCCs) and distribution panels
- Transformers rated 600VAC or 600VDC
- Industrial control circuits and branch-circuit protection schemes
Replaces / Drop-In Replacement For
The Mersen TRS1R directly replaces other 1A 600V Class RK5 time-delay fuses, including legacy Gould Shawmut TRS1R units and equivalent Ferraz TRS1R models. Always verify fuse holder compatibility and circuit requirements before substitution.
Works With
- Standard single-phase and three-phase 600V circuits
- AC and DC rated equipment (dual voltage rating)
- Utility service entrance protection up to 200 kA
