Overview
The Shawmut A4J6 is a NEMA Class J fast-acting, current-limiting cartridge fuse engineered for reliable protection in industrial control and distribution systems. Rated at 6 amperes, 600 volts AC (300 volts DC), with a 200 kA interrupting capacity, this fuse delivers consistent performance in demanding electrical applications. Built on proven Amp-Trap technology, the A4J6 combines high current limitation with low peak let-thru current, minimizing equipment damage during fault conditions.
Key Features
- Fast-acting response for sensitive circuit protection
- High current limitation minimizes peak let-thru current and equipment stress
- Fiberglass cartridge body resists thermal shock and harsh environments
- Class J rejection design prevents substitution with inferior fuses
- Easy-to-read imprint label for quick identification and replacement
- UL, CSA, and RoHS certified for safety and regulatory compliance
Technical Specifications
- Amperage Rating: 6A
- Voltage Rating: 600 VAC, 300 VDC
- Interrupting Capacity: 200 kA @ 600V, 100 kA @ 300V
- Speed: Fast-Acting
- Class: NEMA Class J
- Construction: Fiberglass cartridge with ferrule terminals
- Certifications: UL, CSA, RoHS
- Series: A4J
Typical Applications
The Shawmut A4J6 protects branch circuits, control transformers, motor starters, soft starters, and general-purpose distribution panels. Its fast-acting characteristic and excellent current-limiting properties make it ideal for:
- Industrial machinery and equipment control circuits
- HVAC and heating system branch protection
- Manufacturing automation and PLC systems
- Motor control center (MCC) backup protection
- Semiconductor and sensitive electronic loads
Compatibility & Replacements
Compatible With
- Standard Class J fuse holders and clips
- Control transformers rated 600V and below
- Motor starters and soft-start drives
- Industrial switchboards and panelboards
- Machinery control cabinets with Class J fuse blocks
Replaces / Drop-In Replacement For
- Ferraz Shawmut A4J6
- Gould Shawmut A4J6
- Mersen A4J6
- Any legacy Class J 6A 600V current-limiting fuse with same footprint
Works With
- All Class J rejection-style fuse blocks and holders
- 600V distribution equipment per NEC Article 240
- Industrial control systems and branch circuits
- Eaton, Schneider, Siemens, and ABB fuse holders rated for Class J cartridges
