Overview
The Shawmut A4J6 6A is a Class J fast-acting cartridge fuse manufactured by Mersen (formerly Ferraz Shawmut). This box contains 10 fuses, each rated 6 amperes at 600V AC (300V DC), with a 200kA interrupt rating. The A4J6 delivers current-limiting protection to industrial control circuits, machinery, and electrical distribution systems where compact, reliable fuse protection is essential.
Key Features
- Fast-Acting Classification: Responds quickly to overcurrent conditions, minimizing equipment damage
- Current-Limiting Design: Reduces fault current and limits energy release during fault events
- Class J Standard: Unique dimensional design prevents substitution with inferior fuses
- Ferrule Terminal Connections: Easy installation in standard Class J fuse holders
- UL and CSA Certified: Meets UL 248-8 and CSA C22.2 standards for safety compliance
- Compact Cartridge Design: Space-efficient cylindrical form factor fits most enclosures
Technical Specifications
- Amperage Rating: 6A
- Voltage Rating: 600V AC / 300V DC
- Interrupt Rating: 200kA @ 600V AC; 100kA @ 300V DC
- Classification: Class J, Fast-Acting
- Body Size: 13/16" diameter × 2-1/4" length
- Terminal Type: Ferrule
- Material: Fiberglass tube with current-limiting element
- Brand/Family: Mersen Amp-Trap®
- Certifications: UL 248-8 (File E2137), CSA C22.2 No. 248.8, IEC 269-2-1, RoHS Compliant
- Quantity per Box: 10 fuses
- UPC: 782001960094
Typical Applications
The Shawmut A4J6 fuse is widely used in:
- Industrial machinery and motor control circuits
- Distribution panels and switchgear
- Control transformer protection
- Power supply circuits rated up to 600V
- HVAC systems and electrical infrastructure
- OEM equipment designed for Class J fuse protection
Compatibility & Replacements
Compatible With
- Class J fuse holders and clips
- Standard 600V industrial control circuits
- UL-listed electrical enclosures with Class J rated protection
- Industrial equipment utilizing cartridge fuse mounting
- Both AC and DC applications (within voltage limits)
Replaces / Drop-In Replacement For
- Ferraz Shawmut A4J6 (older manufacturing designation)
- Mersen A4J6 (current manufacturer name)
- Other Class J 6A 600V fast-acting fuses with equivalent interrupt ratings
Works With
- Class J fuse cartridge holders and rejection bases
- Electrical distribution systems rated 600V and below
- Both AC and DC circuits within rated voltage specifications
- Standard cartridge fuse test equipment and measurement instruments
