Overview
Bussmann JJS-225 is a Class T fast-acting current-limiting fuse rated for 225 amperes at 600 VAC. Part of the Eaton Bussmann Limitron series, this advanced protection fuse is designed for industrial and commercial branch-circuit applications where rapid fault response and precise current limitation are critical. The JJS-225 delivers superior protection with a 200 kA interrupt rating and maintains a compact profile ideal for space-constrained installations.
Key Features
- Class T fast-acting fuse with 10X better current limitation for enhanced protection
- 225A rating at 600 VAC with 200 kA interrupt rating (RMS symmetrical)
- Current-limiting design reduces stress on connected equipment during fault events
- Compact cartridge form factor (1.0″ diameter × 3.63″ length) for efficient mounting
- Bolted blade end terminals for secure installation in standard Class T holders
- Non-indicating, non-rejection design for standard branch-circuit protection
- Approved for VFD line protection and control/solenoid circuit applications
Technical Specifications
- Rated Current: 225 A
- Rated Voltage: 600 VAC
- Interrupt Rating: 200 kA (RMS symmetrical)
- Fuse Class: T (per UL 248-15)
- Speed: Fast-acting (very fast-acting characteristics)
- Body Diameter: 1.0″
- Body Length: 3.63″
- Terminal Type: Bolted Blade End × Bolted Blade End
- Cartridge Material: Melamine
- Mounting Type: Holder Mount
Typical Applications
The Bussmann JJS-225 is ideal for:
- VFD (Variable Frequency Drive) line protection in industrial motors and machinery
- Control circuit protection in industrial facilities and commercial installations
- Solenoid circuit terminal protection in automation systems
- High-fault-current branch circuits requiring precise current limitation
- Power distribution in large apartment complexes and multi-family meter stacks
- OEM equipment protection in machinery and factory automation
Compatibility & Replacements
Compatible With
- Standard Class T fuse holders rated for 600V and 225A minimum
- Industrial electrical panels and distribution equipment with Class T openings
- VFD motor control circuits (600V systems)
- Power distribution panels in commercial and industrial facilities
- Equipment designed for bolted-blade-end cartridge fuses
Replaces / Drop-In Replacement For
- Equivalent Class T 225A 600V fuses from other manufacturers
- Earlier Bussmann T-TRON fuse models in the same amperage rating
- Other current-limiting Class T fuses meeting UL 248-15 specifications
Works With
- UL 248-15 Class T fuse standards and holders
- CSA C22.2 No. 248.15 certified equipment
- RoHS-compliant (2011/65/EU) electrical systems
- Industrial motor control and VFD protection schemes
