Eaton KTK-R-2-1/2 Current-limiting fuse - UL Listed
Part Number: KTK-R-2-1/2
Quick Summary
The Eaton KTK-R-2-1/2 current-limiting fuse protects electrical control panels and machinery by rapidly interrupting faults. This Bussmann series device helps prevent nuisance trips and equipment damage in demanding industrial environments. UL Listed and CSA Certified marks, plus CE Marked RoHS compliance, ensure regulatory conformity across regions. With a 2.5 A rating, 600 V rating, and a high 200 kAIC interrupt capacity, it supports reliable protection in power distribution and control circuits. By combining fast-acting protection with a dual-element design, it reduces downtime and extends component life, while remaining compatible with standard ferrule-end mounting. For panel builders and integrators, this translates to shorter maintenance windows and improved safety margins.
Product Information
Extended Description
KTK-R-2-1/2 Eaton: Eaton Bussmann Series Class CC fuse, KTK-R, fast-acting, dual-element current limiting fuse, 2.5 A, rejection style fuse, interrupting rating of 200kA at 600Vac
Product Name
Eaton Bussmann series KTK-R fuse
Catalog Number
KTK-R-2-1/2
UPC
051712420754
Product Length/Depth
1.5 in
Product Height
0.41 in
Product Width
0.41 in
Product Weight
0.18 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Certifications
UL Listed CSA Certified
Type
Current-limiting fast-acting fuse
Special features
Rejection style
Application
Industrial controls panels and machinery, street lighting, general lighting, capacitors and distribution
Amperage Rating
2.5 A
Number of elements
Dual
Class
Class CC
Interrupt rating
200 kAIC
Fuse indicator
Non-indicating
Connection
Ferrule end x ferrule end Ferrule
Response time
See time current curve
Material
Melamine tube
Packaging type
Standard
Quantity
10
Voltage rating
600 V
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
Bussmann series Fuseology
Eaton Specification Sheet - KTK-R-2-1/2
KTK-R Spec Sheet
KTK-R Spec Sheet
Feature: Current-limiting fast-acting, dual-element design. Business Impact: Minimizes energy transfer during faults, limits damage to downstream components, and reduces post-fault cleanup time. Application: Ideal for industrial controls, motor starters, and small-power distribution segments where fast clearing is critical. Feature: High interrupt rating of 200 kAIC at 600 VAC. Business Impact: Supports fault currents typical in large panels and distribution gear without sacrificial damage, enhancing system resilience. Application: Useful in main feeders and multi-load panels in manufacturing lines and street-lighting networks. Feature: Rejection-style ferrule-end connections. Business Impact: Prevents incorrect fuse installation and ensures secure, vibration-resistant mounting, lowering service calls related to mis-fits. Application: Common in modular control panels and retrofit projects. Feature: Class CC, 2.5 A rating. Business Impact: Delivers precise protection for small to medium circuits while avoiding nuisance tripping on steady-state loads. Application: Capacitor banks, distribution blocks, and control circuits in automation cabinets. Feature: Compliance and material quality. Business Impact: UL Listed, CSA Certified, CE Marked RoHS; simplifies regulatory approvals and supports global deployment. Application: Global panel builds requiring cross-border certification.
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FAQs
KTK-R-2-1/2 uses ferrule end connections on both ends (Ferrule end x Ferrule end), designed for standard Bussmann-style fuse holders in industrial panels. The ferrule design provides a secure, vibration-resistant connection that withstands harsh environments. Installation is straightforward, and the ferrule ends help prevent loosening under electrical noise or temperature cycling.
The fuse features a 2.5 A amperage rating and a 600 V rating, with a current-limiting fast-acting profile and a 200 kAIC interrupt rating. This combination enables rapid fault clearance while protecting sensitive components in power distribution and control circuits. The dual-element design also reduces arc energy and heat buildup during faults.
Yes. The KTK-R-2-1/2 is UL Listed and CSA Certified, confirming adherence to North American safety standards. It also carries CE Marking and RoHS compliance for global installations. These certifications streamline regulatory approvals for multi-site projects and reduce risk during panel design, assembly, and field service.
This fuse is well-suited to industrial control panels and machinery, street lighting, general lighting, capacitors, and distribution networks. Its 2.5 A rating supports small to mid-size circuits, while the 200 kAIC interrupt capacity handles occasional large faults. Rejection style and ferrule-end connections simplify integration into existing Bussmann/terminal blocks, supporting faster commissioning and lower maintenance costs.
Time-current behavior is provided by Eaton’s time-current curve; the KTK-R-2-1/2 is a fast-acting current-limiting fuse designed to open quickly when fault currents exceed its rating. For design validation, consult the KTK-R datasheets and curve graphs to ensure proper coordination with upstream protection and to minimize nuisance trips while protecting sensitive components.