Eaton KTN-R-50 Fuse - Class RK1, 50A, 250V Fast-acting
Part Number: KTN-R-50
Quick Summary
The Eaton KTN-R-50 fuse is a fast-acting current-limiting device used to protect industrial branch circuits up to 50 A at 250 V. Engineers often struggle with nuisance fuse blows and downtime when protection is mismatched to load surges. This model embodies Class RK1 practice with a 200 kA interrupting rating, and while the data provided doesn’t list CE or RoHS certifications, industry use typically aligns with established safety and performance standards. Its ferrule-end connections, compact footprint, and 70/30 brass end caps support quick installation and scalable protection across control panels, power distribution blocks, and machine circuits. In practice, this fuse delivers reliable protection while simplifying maintenance planning and asset management in automation environments.
Product Information
Extended Description
KTN-R-50 Eaton: Eaton Bussmann Series Class RK1 fuse, KTN-R, fast-acting, current limiting fuse, 50 A, rejection style fuse, interrupting rating of 200 kA at 250 Vac
Product Name
Eaton Bussmann series KTN-R fuse
Catalog Number
KTN-R-50
UPC
051712407113
EAN
5027590446228
Product Length/Depth
0.81 in
Product Height
3 in
Product Width
0.81 in
Product Weight
0.9 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
50 A
Voltage rating
250 V
Material
Melamine glass tube
Number of elements
1
Packaging type
Standard
Class
Class RK1
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Special features
70/30 brass end cap
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Bussmann series KTN-R 250 V Class R fuse data sheet no. 1043
Feature: Fast-acting, current-limiting design for rapid fault interruption → Business Impact: Reduces fault energy and thermal buildup, cutting downtime and equipment wear → Application: Protects motors, drives, and PLC I/O circuits in, for example, packaging lines and assembly stations. Long-tail keywords: fast-acting fuse, current-limiting fuse, motor protection. Feature: Class RK1 configuration with 50 A, 250 V rating → Business Impact: Ensures compatibility with standard control panels and branch circuits, facilitating plug-and-play deployment → Application: Industrial automation panels needing compliant protection at common operating voltages. Feature: Rejection style, non-indicating fuse → Business Impact: Simplifies status checks and minimizes nuisance indicators during preventive maintenance → Application: Panel retrofits where clean visual inspection is preferred. Feature: Ferrule end x ferrule end with 70/30 brass end caps → Business Impact: Improves connection reliability and thermal performance, reducing contact resistance → Application: Ferrule-based fuse blocks and replacement in legacy gear. Feature: Melamine glass tube, 1 element, 200 kA interrupting rating → Business Impact: High fault tolerance and rugged service in harsh manufacturing environments → Application: High-energy protection scenarios in power distribution and machine safety circuits. Feature: Compact dimensions (0.81 in x 0.81 in cross-section, 3 in height) and standard packaging → Business Impact: Enables dense panel layouts and easy stocking for maintenance teams → Application: OEMs and maintenance depots seeking space-efficient protection components. Additional context: The data highlights the Bussmann series lineage and current rating, supporting OEMs looking to maintain consistency with existing fuse inventories. Keywords: Class RK1 fuse, 50 A fuses, 250 V protection, 200 kA interrupting rating, ferrule-end fuse, Melamine glass tube.
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FAQs
KTN-R-50 uses ferrule-end x ferrule-end connections and is designed to slide into standard ferrule-based fuse blocks. Customers should verify compatible block ratings for 50 A at 250 V and ensure the mounting space accommodates its 0.81 in by 0.81 in cross-section and 3 in height. Using ferrule-end hardware streamlines replacement and reduces installation time.
The fuse is rated for 50 A and 250 V, with a 200 kA interrupting rating at 250 VAC. It is a fast-acting, current-limiting device designed for rapid fault interruption and reduced energy dissipation in branch circuits and control panels.
Yes, for AC motor protection in automation lines, the 50 A, 250 V rating and high interrupting capacity enable fast fault clearance in motor-control circuits, reducing heat buildup and wear. Ensure the load current and fault energy align with the Class RK1 fuse characteristics for reliable protection.
The provided data lists Class RK1 and general electrical protection features but does not enumerate specific certifications such as CE or RoHS. For formal compliance statements, consult Eaton Bussmann catalogs and the latest data sheets to confirm current marking and regulatory approvals.
By delivering fast fault clearance and high fault withstand (200 kA), the KTN-R-50 minimizes outage duration and equipment damage, lowering maintenance costs and extending asset life. Its non-indicating, rejection-style design reduces false alarms and simplifies stock control, improving depot efficiency and downtime planning.