Overview
The Gould Shawmut TRS70R is a Class RK5 time-delay fuse engineered for critical overcurrent protection in industrial and commercial electrical systems. This Tri-Onic fuse is engineered for overcurrent protection of motors, transformers, service entrance equipment, feeders and branch-circuits, with time-delay characteristics that safely handle harmless starting currents and inrush currents associated with today’s motors and transformers. With a 70-ampere rating and 600-volt capacity, the TRS70R combines current-limiting technology with time-delay response for superior circuit protection.
Key Features
- Dual-Element Construction: Dual element design for optimized performance in motor and transformer circuits
- Time-Delay Operation: Time-delay characteristics safely handle harmless starting currents and inrush currents
- Current-Limiting Performance: Limits fault current to minimize damage to equipment and downstream devices
- Class RK5 Certification: UL Class RK5 rated with 200kA @ 600V AIC rating
- Knife Blade Terminals: Knife blade terminal design for holder mounting
- Non-Indicating Rejection Design: Provides positive rejection in compatible holders
Technical Specifications
- Amperage: 70A
- Voltage Rating: 600 VAC, 600 VDC
- Interrupt Rating: 200 kA (AC), 20 kA (DC)
- Type: Time Delay, Current Limiting
- Class: RK5
- Terminals: Knife Blade (Cartridge)
- Body Material: Cylindrical body with polyester construction
- Dimensions: 1.31″ diameter × 7.88″ length (33.27 × 200.15 mm)
- Weight: 10.88 oz
- Certifications: UL, CSA
- Series: TRS-R (Tri-Onic)
Typical Applications
Ideal for motor circuits, mains, feeders, branch circuits, transformers, service entrance equipment, and general-purpose equipment. The time-delay characteristic makes the TRS70R particularly suited for circuits with motors or transformers where inrush currents are present. Common installations include:
- Motor starter protection
- Transformer primary circuits
- Main and feeder distribution systems
- Industrial machinery and equipment
- Commercial building electrical systems
Compatibility & Replacements
Compatible With
- Ferraz Shawmut fuse holders (Class RK5)
- Mersen fuse blocks and holders (Note: Mersen is the current manufacturer, formerly known as Ferraz Fuses and Gould Fuses)
- Standard Class RK5 cartridge fuse holders rated for 70A minimum
- 600V electrical distribution systems
Replaces / Drop-In Replacement For
- Other part number designations: TRS70, TRS 70 Amp, TRS-70, TRS 70A, TRS70A, TRS-70A, TRS 70R, TRS-70R
Works With
- All standard Class RK5 fuse holders and blocks
- Motor control centers (MCCs) equipped with RK5 cartridge fuse slots
- Substitute parts available: Bussmann FRS-R, Littelfuse FLSR
- UL- and CSA-listed electrical distribution equipment
