Littelfuse JLS400 Class J Fuse – 400A – 600V Fast-Acting Current-Limiting Fuse
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The Littelfuse JLS400 is a 400 Amp Class J fast-acting fuse designed for superior circuit protection in industrial and commercial electrical distribution systems. Part of the JLS series, this current-limiting fuse provides rapid fault interruption to reduce let-through energy and help protect equipment from damaging short-circuit currents. Its compact knife-blade construction allows for space-efficient installation while delivering high interrupting capacity and reliable performance.
Electrical Rating
- Current Rating: 400 Amps
- Maximum AC Voltage: 600 VAC
- Interrupting Rating: 200 kA @ 600 VAC
Key Specifications
- Manufacturer: Littelfuse
- Catalog Number: JLS400
- Series: JLS
- Fuse Class: Class J
- Construction Type: Knife-Blade
- Fuse Type: Fast-Acting Current-Limiting
- Indicating: No
Protection Characteristics
- Fast-acting operation for rapid fault clearing
- Current-limiting design minimizes let-through current and fault energy
- Provides exceptional short-circuit protection
- High interrupting capacity for demanding industrial power systems
- Helps protect electrical and electronic equipment from fault-related damage
Construction Features
- Compact Class J fuse design
- Knife-blade terminal construction
- Non-indicating fuse configuration
- Rugged industrial-duty construction for dependable long-term operation
Mounting & Compatibility
- Mounting Method: Fuse Block / Holder
- Compatible with standard Class J fuse holders and fuse blocks
- Suitable for switchboards, panelboards, motor control centers, and industrial distribution equipment
Applications
- Industrial power distribution systems
- Switchboards and panelboards
- Motor control centers
- Branch and feeder circuit protection
- Industrial machinery and equipment protection
- Current-limiting circuit protection applications
Product Data
- Manufacturer: Littelfuse
- Catalog Number: JLS400
- Product Type: Fast-Acting Current-Limiting Fuse
- Series: JLS
- Fuse Class: Class J
- Type Fuses
- Vendor Littelfuse
- Brand Littelfuse
Returns are easy
You may return items within 30 days of delivery for a refund.
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