Product Description
The TRS40R is a 40‑Amp, 600 Volt AC (300 V DC) cartridge fuse from the TRS‑R (Tri‑Onic®) series — a dual‑element, current‑limiting, time‑delay fuse designed to protect motors, transformers, feeders, service entrance equipment, and branch circuits. The time‑delay feature handles harmless inrush currents (like motor startups or transformer energizing) without nuisance blowing. Its current‑limiting behavior limits fault energy, protecting downstream wiring and equipment. The fuse uses a rejection‑style cartridge design to prevent incorrect replacements when used with recommended holders.
Product Details
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Brand: Gould Shawmut / Mersen
- Condition: Used
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Model / Part Number: TRS40R
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Fuse Class: Class RK5, Time‑Delay / Current‑Limiting
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Amperage Rating: 40 A
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Voltage Rating: 600 V AC / 300 V DC
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Interrupt Rating: 200 kA at 600 V AC; 20 kA at 300 V DC
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Body Style / Size: Cylindrical cartridge — approx. 1‑1/16" diameter × 5‑1/2" length
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Terminal Type: Ferrule‑end × Ferrule‑end (clip / fuse block mount)
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Standards / Certifications: UL (UL 248‑12), CSA compliant (for AC and DC use)
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Applications: Motor circuits, feeders, branch circuits, transformers, service entrance equipment, general‑purpose circuits
Key Features
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Dual‑element time‑delay design — tolerates motor start‑ups and transformer inrush currents without nuisance fuse blowouts.
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Current‑limiting fuse limits let‑through energy under fault conditions — protecting downstream wiring and equipment.
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High interrupt rating (200 kA AC) for reliable protection in high‑fault‑current environments.
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Rejection‑style cartridge design helps avoid incorrect fuse substitutions when installed in fuse blocks designed for RK5 fuses.
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Dual AC/DC ratings — versatility for a wide range of installations.
