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

Mersen TR12R Tri-Onic Class RK5 Time-Delay Fuse, 12A

The Mersen TR12R is a Tri-Onic series Class RK5 time-delay fuse rated 12A for 250VAC / 160VDC applications, built with ferrule terminals for clip-mount installation in fuse blocks and holders. Designed for AC/DC circuit protection, this fuse combines a durable PolyTube insulating body with copper connection terminals to deliver dependable overcurrent protection in demanding electrical environments. With a 200 kA AC maximum interrupting rating and RoHS-compliant construction, the TR12R is engineered for reliable, code-compliant performance in motor, control, and branch circuit applications.

Key Features

• Ampere & Voltage Rating: 12A rated for 250VAC / 160VDC, suitable for AC/DC circuit protection.
• Time-Delay Class RK5: Time-delay speed characteristic allows the fuse to ride through momentary inrush currents while still protecting against sustained overloads.
• High Interrupting Capacity: 200 kA AC maximum breaking capacity (I1) for dependable protection against high fault currents.
• Copper Connection Terminals: Copper terminal material ensures a reliable, low-resistance connection at the ferrule contacts.
• Durable PolyTube Body: PolyTube insulating body material provides sturdy, non-conductive housing for the fuse element.
• Clip Mounting, Ferrule Style: Ferrule-terminal Tri-Onic construction is designed for clip-style mounting in standard fuse holders and blocks.
• Frequency Rating: Rated for 50/60 Hz, compatible with standard AC power systems.
• Compact Footprint: Measures 2 in in length and weighs just 0.037 lb.

Certifications & Compliance

• RoHS Compliant
• UL-Recognized Voltage Ratings: 250VAC / 160VDC

Technical Specifications

• Ac Max I R Breaking Capacity I1: 200 kA
• Ac Or Dc: AC/DC
• Body Insulating Material: PolyTube
• Connection Terminal Material: Copper
• Frequency Hz: 50/60 Hz
• Mounting Method: Clip
• Product Length: 2 in
• Product Weight: 0.037 lb
• Rated Voltage Ac Ul: 250 V
• Rated Voltage Dc Ul: 160 V
• Rohs Compliant: Yes
• Speed Characteristic: Time Delay

Typical Applications

• Motor and Control Circuit Protection
• Industrial and Commercial Panelboards
• Branch Circuit and Equipment Protection
• OEM and Panel Builder Fuse Assemblies
• AC/DC Rated Electrical Systems

Why Mersen?

Mersen's Tri-Onic TR12R combines a Class RK5 time-delay design with a 200 kA interrupting rating, copper terminals, and a durable PolyTube body to deliver consistent, code-compliant overcurrent protection. RoHS-compliant construction and dual AC/DC voltage ratings make this fuse a dependable choice for professional electrical and industrial installations that demand reliable circuit protection.