Overview
The Eaton Bussmann JJS-100 is a Class T fast-acting, current-limiting fuse designed for industrial and commercial power distribution systems. Operating at 600 VAC with a 100A rating and 200 kA interrupting capacity, this fuse provides superior protection against short-circuit events. The compact design fits standard bolt-on fuse holders with a small footprint, making it ideal for panel upgrades and replacement installations where space is limited.
Key Features
- 10X current limitation — Reduces let-through current during short-circuit faults to minimize equipment damage
- 200 kA interrupting rating — Complies with NEC Section 110.9 for modern large-capacity electrical systems
- Non-indicating design — Bolted blade end connections for secure mounting in Class T fuse holders
- Fast-acting response — Quickly opens on overload and fault conditions
- Compact footprint — Space-efficient design allows higher-density fuse configurations
- Standards-compliant — UL 248-15 Class T, CE, and CSA certified for worldwide applications
Technical Specifications
- Ampere Rating: 100 A
- Voltage Rating: 600 VAC
- Interrupting Rating: 200 kA RMS Symmetrical at 600 VAC
- Speed: Fast-acting (Class T)
- Body Style: Cartridge fuse
- Blade Connections: Bolted blade end × bolted blade end
- Dimension (Width): 0.75 in. ±0.04
- Dimension (Length): 2.95 in. ±0.04
- Series: Limitron JJS 600V
- Certifications: UL 248-15, CE, CSA C22.2 No. 248.15, RoHS compliant
- Package Quantity: Box of 5 units
- Manufacturer: Eaton (Bussmann)
Typical Applications
The JJS-100 serves critical roles in equipment protection across diverse industries:
- Power distribution panels and switchboards
- Industrial motor control centers and VFD circuits
- Data center and telecommunications power systems
- Commercial HVAC and mechanical systems
- Manufacturing facility branch circuits and feeder lines
- Equipment requiring rapid overload response and superior short-circuit coordination
Compatibility & Replacements
Compatible With
- Standard Class T bolt-on fuse holders (600V rated)
- Industrial and commercial power distribution panels
- Electrical switchgear and motor control centers
- Systems requiring 200 kA or higher interrupting rating compliance
- VFD line protection circuits
Replaces / Drop-In Replacement For
- Equivalent 100A Class T fuses in bolt-on configurations
- Earlier generation Bussmann Class T fuses (600V, 100A)
- Verify exact predecessor models with your system integrator for critical applications
Works With
- Class T fuse blocks and holders rated 600V
- NEC Article 240 compliant electrical systems
- Coordination with modern circuit protection schemes up to 200 kA
- Single-phase and three-phase distribution systems operating at 600V or below
