Mersen TR-9R Tri-Onic Class RK5 Time-Delay Fuse

Mersen TR-9R Tri-Onic Class RK5 Time-Delay Fuse

The Mersen TR-9R Tri-Onic Class RK5 Time-Delay Fuse delivers current-limiting overcurrent protection for motors, transformers, service entrance equipment, feeders, and branch circuits. This Class RK5 fuse is rated 250V AC and 160V DC (UL) with a 200 kA AC maximum interrupting rating, giving electrical professionals dependable protection in demanding power distribution systems. The Tri-Onic TR-9R series is available with your choice of Blade or Ferrule termination, so the same time-delay performance and PolyTube insulating body construction can be matched to the connection style your fuseholder or fuseblock requires. Whether specified for Blade or Ferrule termination, every TR-9R fuse shares the same 50/60 Hz rating, RoHS compliance, and time-delay characteristic engineered to ride through harmless motor starting and transformer inrush currents without nuisance opening.

Key Features

• Fuse Class: Class RK5 current-limiting, time-delay fuse for reliable overcurrent protection.
• Rated Voltage: 250V AC / 160V DC (UL) for use across AC and DC circuits.
• Breaking Capacity: 200 kA AC maximum interrupting rating (I1) for high fault-current applications.
• Time-Delay Characteristic: Safely handles harmless motor starting and transformer inrush currents to avoid nuisance opening.
• Connection Options: Available in Blade or Ferrule termination styles to match your fuseholder or fuseblock configuration.
• Body Construction: PolyTube insulating body material for durable performance.
• Frequency: Rated for 50/60 Hz applications.
• Packaging: Supplied 10 EA per package for convenient stocking.

Certifications & Compliance

• UL Rated Voltage: 250V AC / 160V DC
• RoHS Compliant

Technical Specifications

• Mounting: Clip
• AC Max I.R./Breaking Capacity (I1): 200 kA
• ROHS Compliant: Yes
• Frequency: 50/60 Hz
• Rated Voltage AC (UL): 250 V
• Rated Voltage DC (UL): 160 V
• Speed/Characteristic: Time Delay
• AC or DC: AC/DC
• Fuse Class: Class RK5
• Body/Insulating Material: PolyTube
• Connection Type Options: Blade, Ferrule
• Packaging: 10 EA

Typical Applications

• Motor Overcurrent Protection
• Transformer Protection
• Service Entrance Equipment
• Feeder and Branch-Circuit Protection
• Industrial and Commercial Power Distribution Systems

Why Mersen?

Mersen Tri-Onic TR-9R fuses pair a PolyTube insulated body with a 200 kA AC breaking capacity and UL-rated 250V AC/160V DC performance, giving electrical professionals dependable, code-compliant overcurrent protection for motors, transformers, and distribution equipment. Available in Blade or Ferrule connection styles, RoHS-compliant Class RK5 time-delay construction helps ensure safe operation through normal starting and inrush currents without unnecessary fuse opening. Shop Mersen electrical protection products at ZenSupply for specification-driven reliability you can trust on the job.