Eaton RES-20 Fuse - Class H, 20 A, 10 kAIC
Part Number: RES-20
Quick Summary
The Eaton RES-20 fuse provides reliable overcurrent protection for industrial and commercial electrical systems. Engineers often confront nuisance trips and misapplied fuses that disrupt uptime and maintenance planning. Note that no CE, UL or IP certifications are listed for this part in the catalog; however it carries robust ratings including 10 kAIC at 250 Vac and a 600 V rating to support safe protection in typical power circuits. This combination supports standardized procurement and reliable protection in power distribution, panelboards, and motor-control applications, while offering straightforward compatibility with Bussmann RES components and time-lag operation for practical installations.
Product Information
Extended Description
RES-20 Eaton: Eaton Bussmann series RES fuse, time lag, non current-limiting, Industrial and commercial structures, 20 A, Class H, Non-indicating, Ferrule end x ferrule end, 10 kAIC at 250 Vac, Standard, 10, 600 V
Product Name
Eaton Bussmann series RES fuse
Catalog Number
RES-20
UPC
051712110204
Product Length/Depth
5 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.18 lb
Warranty
Not Applicable
Compliances
Not Applicable
Amperage Rating
20 A
Interrupt rating
10 kAIC at 250 Vac
Voltage rating
600 V
Packaging type
Standard
Class
Class H
Connection
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Quantity
10
Special features
Super lag, time lag, non current-limiting
RES-20~SUPER LAG RENEWABLE FUSE 20/600
RES-20~SUPER LAG RENEWABLE FUSE 20/600
Bussmann series Fuseology
Eaton Specification Sheet - RES-20
Feature: Time lag, non-current-limiting design delivers controlled response to short surges, reducing nuisance trips in motor-start and control circuits. Benefit: Improves uptime and extends equipment life by preventing unnecessary fuse blows in normal load fluctuations. Application: Motor control centers and industrial panels where consistent protection is critical. Feature: 20 A amperage rating with a 10 kAIC interrupt rating at 250 Vac and a 600 V rating. Benefit: Provides robust fault clearance across standard industrial power distributions, enabling a single component to safeguard multiple subsystems. Application: Panelboards and feeders in commercial facilities. Feature: Ferrule end x ferrule end connection with Class H construction. Benefit: Quick, reliable installation in common fuse holders with predictable performance under hot or cold operating conditions. Application: Commercial and light-industrial wiring schemes. Feature: Standard packaging of 10 units and non-indicating fuse indicator. Benefit: Streamlines stocking, reduces downtime, and simplifies replacement planning. Application: Warehouse and distribution center racks, maintenance inventories. Feature: Availability of catalogs, specification sheet and Fuseology video from Eaton. Benefit: Accelerates design decisions, ensures correct part selection, and supports compliance documentation. Application: Electrical design reviews and procurement, using reliable, fast-access resources.
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FAQs
Yes. The RES-20 uses ferrule-end connections designed to fit standard Bussmann RES fuse holders. Its 5 in length and ferrule terminals simplify installation in panelboards and distribution boards, allowing quick replacement with minimal tool requirements. Always verify holder compatibility with your specific enclosure and ensure proper torque on ferrule crimps during maintenance.
The RES-20 is rated for 20 A with a 10 kAIC interrupt rating at 250 Vac and a voltage rating of 600 V. This enables effective fault clearance for typical industrial circuits while supporting safe operation across medium-voltage distribution. In motor-control and lighting panels, these ratings help balance protection with startup inrush considerations and fault clearing speed.
The RES-20’s time-lag, non-current-limiting design is suitable for many controlled loads in commercial environments, but is not optimized for high inrush motor protection where current-limiting devices are preferred. For motor-start scenarios, assess inrush characteristics and ensure the fuse’s time-delay behavior aligns with your motor controller and drive tolerances.
Catalog data for this part lists Compliances as Not Applicable. There is no explicit CE, UL, SIL, or IP certification noted in the provided data. Users should verify local regulatory requirements and consult the Eaton specification sheet for any applicable listings before deployment in regulated environments.
Eaton provides a range of resources including the RES-20 catalog entry, the full line catalog PDF, and the Eaton Specification Sheet for RES-20. A Fuseology video is also available for technical context. These assets support accurate part selection, faster procurement, and informed maintenance planning, contributing to reduced downtime and optimized spare parts inventories.