Eaton RK5SK-39 Fuse - Class RK5, 250/600 V
Part Number: RK5SK-39
Quick Summary
The Eaton RK5SK-39 fuse provides reliable overcurrent protection for branch circuits in control panels and power distribution assemblies. Engineers frequently face nuisance trips and downtime when protection isn’t matched to circuit loads or upstream devices. As a Class RK5 device, it aligns with industry norms for fast-acting protection; many markets pursue CE marking and UL recognition to meet regional compliance. Together with its 250 V/600 V ratings and standard Bussmann series form factor, it delivers predictable protection, streamlined procurement, and lower total cost. Its non-indicating design keeps panel layouts compact while maintenance replacements use the same RK5SK-39 catalog number, reducing downtime.
Product Information
Extended Description
RK5SK-39 Eaton: Eaton Bussmann series RK5SK fuse, Branch circuit, Class RK5, Non-indicating, Standard, 250 V, 600 V
Product Name
Eaton Bussmann series RK5SK fuse
Catalog Number
RK5SK-39
UPC
051712630177
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
8.7 lb
Warranty
Not Applicable
Compliances
Not Applicable
Voltage rating
250 V, 600 V
Packaging type
Standard
Class
Class RK5
Fuse indicator
Non-indicating
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Bussmann series Fuseology
Eaton Specification Sheet - RK5SK-39
Feature: Class RK5 fast-acting protection with a non-indicating fuse. Business Impact: Rapid clearing of overloads minimizes heat damage, arc energy exposure, and downstream equipment wear. Application: Ideal for branch circuits in industrial control panels and machine safety circuits, where selective coordination is essential. Feature: Wide voltage rating of 250 V and 600 V. Business Impact: Enables use across low- and medium-voltage control circuits without multiple part numbers. Application: Suitable for power distribution blocks and automation equipment common in manufacturing facilities. Feature: Non-indicating status. Business Impact: Simplifies panel density and reduces wiring clutter; periodic electrical testing is recommended to verify continuity. Application: Fits standard enclosures and field replacement on Bussmann series lines. Feature: Standard packaging. Business Impact: Improves procurement efficiency and stock management across plants; reduces order variability. Application: Supports maintenance programs requiring consistent RK5 series components. Feature: Cataloged fuse with robust form factor. Business Impact: 8.7 lb weight indicates sturdy packaging and durable field replacement; reduces risk of damage during handling. Application: Fits standard rack and panel mounts in industrial automation, motor control centers, and service equipment.
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FAQs
Install the RK5SK-39 in control panels or distribution blocks using standard Bussmann series components. Verify the enclosure supports 250 V/600 V operation, use the catalog RK5SK-39 for replacements, and recognize its non-indicating design which requires testing with appropriate instrumentation to confirm the fuse status after a fault.
Yes, the RK5SK-39 is rated for 250 V and 600 V applications, making it suitable for a range of industrial control and power distribution circuits. Select the voltage rating to match system voltage and insulation coordination requirements, ensuring proper fuse coordination with upstream protection.
Industries with demanding control systems and automation lines benefit from Class RK5 fuses. Applications include manufacturing automation, electrical distribution in machinery, and panel-based power management, where fast fault clearance and reliable protection help maximize uptime and extend equipment life.
The RK5SK-39 is part of Eaton's Bussmann series and supports regional compliance expectations common for Class RK5 fuses. Exact certifications such as CE marking or UL recognition depend on regional approvals and packaging lot, so verify site-specific requirements with procurement and enclosure manufacturers before deployment.
The RK5SK-39 provides reliable branch circuit protection with standard packaging, simplifying spare part stocking across plants. Its fast-acting design reduces downtime from faults, while non-indicating status encourages routine electrical testing. Using the same RK5SK-39 catalog number streamlines replacement workflows and supports predictable maintenance budgets.