Overview
Gould Shawmut TRS30R (also sold as Ferraz Shawmut/Mersen TRS30R) is a Class RK5 time-delay, dual-element fuse engineered for industrial overcurrent protection. Designed for reliable overcurrent protection in motor circuits and transformers, this fuse combines current-limiting performance with time-delay characteristics to handle motor starting inrush and transformer energization transients without nuisance trips.
Key Features
- Time-delay characteristic safely handles motor starting and transformer inrush currents while preventing nuisance trips
- High interrupting rating of 200,000 AIC at 600 VAC and 20,000 AIC at 300 VDC, suitable for protecting service entrance equipment, feeders, and branch circuits
- Dual element, current limiting fuse with a cylindrical body measuring approximately 13/16 inch diameter by 5 inches length
- Rejection-style design prevents replacement errors when used with recommended fuse blocks
- AC and DC rated for versatile applications
- Fiberglass body provides dimensional stability in harsh industrial settings
Technical Specifications
- Amperage Rating: 30A
- AC Voltage Rating: 600VAC
- DC Voltage Rating: 300VDC
- Fuse Class: RK5
- Type: Time-Delay, Dual-Element, Current-Limiting
- Interrupting Rating (AC): 200,000 AIC @ 600VAC
- Interrupting Rating (DC): 20,000 AIC @ 300VDC
- Physical Dimensions: 13/16″ diameter × 5″ length
- Body Material: Fiberglass with silica filler
- UL Certification: UL 248-12 File E2137, DC Listed UL 248, CSA C22.2 No. 248.4
- Design Style: Rejection-style ferrule
Typical Applications
Commonly used in motor control centers, transformers, and distribution panels, making it versatile across multiple sectors including manufacturing, commercial buildings, and power generation. Suitable for:
- Motor circuit protection
- Transformer inrush protection
- Service entrance equipment
- Feeder and branch circuit protection
- General-purpose equipment protection
Compatibility & Replacements
Compatible With
- Class RK5 fuse holders and blocks
- Ferraz Shawmut fuse reducers (60A to 30A: R636; 100A to 30A: R162)
- Ferraz Shawmut pressure plate and screw connector fuse blocks
- Rejection-style (3R) fuse blocks for 30A rated equipment
- Motor control centers with RK5 certification
Replaces / Drop-In Replacement For
The TRS30R is the current Mersen/Ferraz Shawmut designation for the Gould Shawmut Tri-Onic series. While Gould branded units have been discontinued in favor of Ferraz/Mersen rebranding, the TRS30R specification remains unchanged. Verify compatibility with your fuse block specifications before ordering to ensure proper rejection-style fitment.
Works With
- Recommended fuse blocks: 60306R (1-pole), 60307R (2-pole), 60308R (3-pole)
- Industrial control equipment rated for Class RK5 protection
- Any 30A 600VAC/300VDC circuit requiring dual-element time-delay protection
