TR25R - 25 Amp Fuse Description
TR25R - 25 Amp Fuse
A motor doesn't always draw the same amount of electricity. When it first starts, the current can jump well above its normal operating level. Transformers behave similarly when they're energized. That's why choosing the right fuse involves more than matching an amp rating. The Mersen TR25R is a 25-amp Class RK5 time-delay fuse designed to protect electrical equipment against overcurrents while allowing for normal, short-duration starting surges. Part of Mersen's Tri-Onic® TR-R series, it combines time-delay performance with current-limiting protection for motors, transformers, feeders, branch circuits, and other compatible electrical applications. If your equipment calls for a 25A Class RK5 time-delay ferrule fuse, the Mersen TR25R offers a well-defined combination of electrical protection, startup-current tolerance, and practical construction.
Key Features and Benefits
- 25-Amp Current Rating
- Class RK5 Fuse Design
- Tri-Onic® TR-R Series
- Time-Delay Operation
- Current-Limiting Protection
- 250VAC Voltage Rating
- 160VDC Voltage Rating
- Copper Ferrule Terminals
- Clip-Mounted Configuration
- PolyTube Insulating Body
- Compact Cylindrical Design
- 50/60 Hz Frequency Rating
- Motor Starting Current Accommodation
- Transformer Inrush Current Accommodation
Technical Specifications
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Manufacturer: Mersen
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Catalog Number: TR25R
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Series: Tri-Onic® TR-R
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Product Type: Current-Limiting Time-Delay Fuse
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Fuse Class: Class RK5
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Ampere Rating: 25A
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Rated AC Voltage (UL): 250VAC
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Rated DC Voltage (UL): 160VDC
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AC/DC Application: AC and DC, within specified ratings
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Frequency: 50/60 Hz
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Operating Characteristic: Time Delay
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AC Maximum Interrupting Rating: 200kA (200,000A)
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Mounting Type: Clip
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Terminal Type: Ferrule
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Terminal Material: Copper
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Body / Insulating Material: PolyTube
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Product Diameter: 14.3 mm (0.56 in.)
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Product Length: 50.8 mm (2.00 in.)
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Product Weight: 0.0168 kg (0.037 lb.)
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RoHS Compliant: Yes
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Manufacturer Product Group: Low Voltage UL/CSA Fuses
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UPC: 782001747855
Material Compliance and Certifications
- RoHS Compliance
- Manufacturer-Listed UL Voltage Ratings
- 250VAC
- 160VDC
Where It Works Best
- Industrial Motor Protection
- Motor Starter Circuits
- Transformer Protection
- Transformer Inrush Applications
- Service Entrance Equipment
- Electrical Distribution Feeders
- Branch Circuit Protection
- Industrial Control Equipment
- Class RK5 Fuse Holders
- Clip-Mounted Fuse Assemblies
- Equipment Maintenance
- Electrical System Repairs
- Compatible Fuse Replacements
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Specifications
- Width:0.56
- Depth:0.56
- Height:2.0
- Amperes:25
- 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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