TR4R - 4 Amp Fuse Description
TR4R - 4 Amp Fuse
Keep your electrical systems running safely and efficiently with the Mersen TR4R Tri-Onic Class RK5 Time-Delay Fuse. Designed for precision and reliability, this 4-amp fuse provides strong overcurrent protection for both industrial and commercial electrical applications. Its dual-element, time-delay design allows it to handle short bursts of current — such as motor startups or transformer energizing — without interrupting power unnecessarily. That means your equipment gets the protection it needs without sacrificing uptime or performance. Built to perform under demanding conditions, the TR4R fuse offers dependable service you can count on day after day.
Key Features and Benefits
- Handles Startup Surges Smoothly – The time-delay feature allows temporary inrush currents to pass safely, helping motors and transformers start without unwanted shutdowns.
- Protects Equipment During Faults – Its current-limiting ability reduces the amount of energy let through during short circuits, helping to minimize damage and downtime.
- Prevents Misapplication – The rejection-style base ensures the right fuse is always used in compatible fuse blocks, improving safety and ease of maintenance.
- Built for Tough Environments – The fiberglass-reinforced body and silica filler enhance stability and provide excellent arc quenching performance.
- Easy to Identify – Clear labeling with a metal-embossed catalog number and date code simplifies inspection, replacement, and recordkeeping.
Technical Specifications
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Voltage Rating: 250 VAC / 160 VDC
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Current Rating: 4 Amps
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Interrupting Rating: 200 kA AC / 20 kA DC
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Fuse Class: RK5
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Speed/Characteristic: Time-Delay
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Mounting Type: Clip
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Terminal Type: Ferrule (Copper)
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Body Material: PolyTube (Fiberglass)
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Dimensions: 14.3 mm (Diameter) x 50.8 mm (Length)
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Weight: 0.0168 kg
Material Compliance and Certifications
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ROHS Compliant: Yes
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UL Listed: Standard 248-12, File E2137
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CSA Certified: Standard C22.2 No. 248.12
Where It Works Best
- The Mersen TR4R fuse is ideal for a wide range of electrical setups where safety and reliability are top priorities. It’s especially well-suited for:
- Motor Circuits
- Transformers
- Service Entrance Equipment
- Feeders and Branch Circuits
- General-Purpose Industrial and Commercial Systems
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.Mersen® is a registered trademark of Mersen S.A. Products sold are surplus, used, or refurbished and are NOT supplied by Mersen S.A. or its affiliates.
Specifications
- Width:0.56
- Depth:0.56
- Height:2.0
- Amperes:4
- A.I.C. Rating & Volts:200 kA @ 250 V.AC
- Type:TR
- Additional Notes:Cartridge Style, Non-Indicating, Time-Delay, current-limiting Class R Fuse
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You may return unused items within 30 days of delivery for a full refund.
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