Mersen Amp-Trap 2000 Class CC Time-Delay Fuse (ATQR30)
The Mersen ATQR30 is an industrial-grade, high-performance time-delay cartridge fuse from the advanced Amp-Trap 2000® product family. Rated at 30 A and 600 V AC, this highly current-limiting Class CC fuse is explicitly engineered to provide premium overcurrent protection for control transformers, solenoids, and similar inductive branch circuits. Featuring an optimized time-delay characteristic, it easily withstands temporary high-inrush currents without nuisance tripping, while delivering instantaneous, ultra-fast short-circuit clearing against massive faults up to 200 kA.
Key Features
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Optimized Time-Delay Characteristic: Specially formulated to ride through routine, high-magnitude inrush currents caused by control transformers and inductive coils, eliminating unnecessary system downtime.
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Superior Current Limitation: Significantly minimizes the destructive peak let-through energy (I2t) and magnetic forces generated during short circuits, protecting downstream components from severe thermal or physical degradation.
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Rejection-Feature Class CC Profile: Built with a standardized physical rejection tip on the ferrule terminal that prevents the accidental or hazardous installation of lower-rated, non-current-limiting midget fuses into Class CC safety holders.
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High-Capacity Interruption Rating: Safely contains and isolates catastrophic power faults, reliably interrupting symmetrical short-circuit currents up to 200,000 A AC.
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Fiberglass Tube Architecture: Enclosed in a rugged, dimensionally stable fiberglass body that provides excellent arc quenching capabilities, structural integrity, and reliable operation in high-ambient-temperature industrial panel enclosures.
Technical Specifications
| Feature | Specification |
| Model / Catalog Number | ATQR30 |
| Brand / Product Line | Mersen (formerly Ferraz Shawmut) / Amp-Trap 2000® |
| Product Type | Time-Delay Current-Limiting Cartridge Fuse |
| Current Rating (Amps) | 30 A |
| Voltage Rating | 600 V AC |
| Fuse Class Profile | Class CC |
| Interrupting Rating (IR) | 200 kA AC RMS Symmetrical |
| Physical Dimensions | 0.406″ Diameter × 1.500″ Length (10.3 mm 38.1 mm) |
| Terminal / Body Style | Rejection Style Ferrule / Cylindrical Fiberglass Tube |
| Standards & Certifications | UL Listed (Standard 248-4, File E2103), CSA Certified (C22.2, No. 248.4), RoHS Compliant |
Applications
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Control Transformer Primary Isolation: Shielding inductive control voltage transformers from sustained overloads and high line surges.
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Solenoid and Valve Actuator Protection: Serving as a dedicated branch circuit defense for inductive coils and automated fluid-handling solenoids.
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Industrial Control Panels (ICPs): Acting as a compact, code-compliant primary current-limiting defense layer within multi-pole modular fuse blocks.
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Lighting and Heating Circuits: Providing responsive overcurrent protection for inductive commercial lighting ballasts and high-amperage heating element sub-circuits.
