Eaton JJS-125 Fuse - 200 kAIC at 600V Class T protection

Part Number: JJS-125
Manufacturer
Eaton
Part number
JJS-125

Quick Summary

The Eaton JJS-125 fuse is a current-limiting device that protects motor drives and panel assemblies from overcurrents. In many facilities, space limits and nuisance trips complicate protection strategy, so engineers need a compact, reliable solution. This RoHS-compliant Class T fuse delivers a 125 A rating with a 200 kAIC interrupt capability at 600 V, while its small footprint and bolted blade ends simplify installation. By combining protection rigor with easy field compatibility, it supports efficient maintenance and safer, more reliable electrical systems. For teams driving uptime and energy efficiency, the JJS-125 offers a proven path to compliant, robust protection in VFD-driven applications and control panels.

Product Information

Extended Description

JJS-125 Eaton: Eaton Bussmann series JJS fuse, Current-limiting, Small footprint, VFD line protection, 125 A, Class T, Non-indicating, Bolted blade end x bolted blade end, 200 kAIC at 600 V, Standard, 1, 600 V
Product Name
Eaton Bussmann series JJS fuse
Catalog Number
JJS-125
UPC
051712628129
EAN
5027590508841
Product Length/Depth
3.25 in
Product Height
0.88 in
Product Width
3.25 in
Product Weight
0.2 lb
Warranty
Not Applicable
Compliances
RoHS Compliant
Amperage Rating
125 A
Interrupt rating
200 kAIC at 600 Vac
Voltage rating
600 V
Packaging type
Standard
Class
Class T
Connection
Bolted blade end x bolted blade end
Fuse indicator
Non-indicating
Quantity
1
Special features
Small footprint
Feature → Business Impact → Application: Current-limiting performance reduces peak fault currents, protecting downstream components and extending motor life, which lowers maintenance costs in automation systems and drives. Application: VFD line protection and panel boards in industrial environments seeking reliable fault mitigation and longer service intervals. Feature → Business Impact → Application: 125 A amperage rating matches common motor and drive sizes, enabling precise protection without over-dimensioning equipment, resulting in cost savings and reduced energy waste. Application: Medium-current drive circuits and control panels in manufacturing lines. Feature → Business Impact → Application: 200 kAIC at 600 V interrupt rating provides high fault-current handling, enabling safer startup and stop sequences and reducing wear on upstream breakers. Application: UPS, switchgear, and machine control enclosures with high inrush. Feature → Business Impact → Application: Class T designation combines fast response with predictable clearing, supporting reliable motor starting and reducing nuisance tripping in dynamic loads. Application: Drives and automated machines with variable loads. Feature → Business Impact → Application: Small footprint and bolted blade end connections simplify installation and service, enabling denser panel layouts, quicker replacement, and robust mechanical stability. Application: Compact control panels and retrofit projects in constrained spaces. Feature → Business Impact → Application: RoHS compliance supports regulatory alignment and sustainability programs, easing procurement for global facilities. Application: European and North American markets with stricter environmental requirements. Feature → Business Impact → Application: Non-indicating fuse with standard packaging streamlines stock management and replacement strategies. Application: Field service and spares planning for maintenance teams.

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FAQs

Install the JJS-125 using the bolted blade end x bolted blade end configuration. Ensure the panel bus bars and terminal hardware are rated for 600 V and 125 A. Verify proper orientation and seating, then secure with the recommended torque on the blade terminals per the equipment standards. Use appropriate PPE and follow lockout-tagout procedures.
The JJS-125 provides current-limiting protection with a 200 kAIC interrupt rating at 600 V, designed for rapid clearing in motor drive circuits. Its Class T construction and small footprint minimize space requirements while maintaining reliable protection against short circuits and inrush conditions commonly seen in VFD applications.
Yes, the JJS-125 is RoHS compliant, aligning with environmental and regulatory expectations for many global facilities. In addition to RoHS, it is designed for high-availability protection in industrial environments, supporting safe operation of electrical protection schemes in control panels and motor drives.
Yes. The JJS-125 features bolted blade end x bolted blade end terminals suited for 600 V systems. This connection method provides robust mechanical contact and high reliability in panelboards, drive enclosures, and switchgear assemblies, with straightforward maintenance and replacement.
Consult the Eaton Bussmann catalog and the JJS-125 specification sheet for detailed electrical ratings, dimensions, and mounting guidance. Additional resources include the Bussmann Full Line Catalog and the Eaton datasheets, which cover installation practices, safety considerations, and application notes for VFD line protection.