Overview
The Shawmut TRS90R is a Class RK5 dual-element time delay fuse from the Tri-Onic product line. Rated for 90 amps at 600 volts AC/DC with a 200 kiloampere interrupting rating (AC) and 100 kiloampere (DC), this fuse provides current-limiting overcurrent protection for industrial motor circuits, transformers, feeders, and service entrance equipment. The TRS90R features rejection-style blade terminals that prevent incorrect fuse replacement, reducing field assembly errors on standard rejection-style fuse blocks.
Key Features
- Dual-element time delay design handles harmless starting and inrush currents typical of motors and transformers
- Class RK5 current-limiting fuse reduces let-through current and thermal stress on downstream equipment
- 600V AC and 600V DC rated—versatile for both AC and DC circuit applications
- Rejection-style blade terminal eliminates interchangeability errors
- UL 198L, UL 248-12, and CSA C22.2 certified for code compliance
- Fiberglass tube construction for reliable arc suppression
Technical Specifications
Electrical Ratings:
Current: 90 Amperes
Voltage (AC): 600 Vac
Voltage (DC): 600 Vdc
Interrupting Rating (AC): 200,000 AIC @ 600V
Interrupting Rating (DC): 100,000 AIC @ 600V
Class: RK5 (Current-Limiting, Dual-Element, Time Delay)
Speed: Time Delay
Physical Characteristics:
Length: 7-7/8 inches
Diameter: 1-5/16 inches
Terminal Style: Blade (Rejection)
Body Material: Fiberglass Tube
Visual Indication: Non-Indicating
Typical Applications
- Motor circuit protection and starting circuit overcurrent defense
- Transformer primary and secondary protection
- Main service entrance equipment and feeder circuits
- Branch circuits with heavy inrush current loads
- Industrial machinery control systems requiring Class RK5 protection
Compatibility & Replacements
Compatible With
- Standard rejection-style fuse blocks (TRS series compatible bases)
- Industrial electrical distribution panels rated 600V AC/DC
- Motor control centers (MCC) with Class RK5 fuse receptacles
- Transformer protection circuits
- Feeder and service entrance cabinets
Replaces / Drop-In Replacement For
- Original Gould Shawmut TRS90R fuses
- Equivalent ratings: Littelfuse FLSR-090ID, Bussmann FRS-R-90, Edison ECSR-90
- Verify with your equipment OEM before substitution to confirm identical electrical and physical characteristics
Works With
- UL 198L and UL 248-12 certified electrical systems
- CSA-approved industrial control equipment (C22.2 No. 248.12)
- Standard rejection fuse block assemblies
- Both AC and DC power distribution systems up to 600V
