Eaton ER53040UD Enclosed Rotary Disconnect - NEMA 12/3R
Part Number: ER53040UD
Quick Summary
Eaton enclosed rotary disconnect switch ER53040UD provides safe motor circuit isolation for industrial control panels. Maintainers often struggle with space, corrosion, and noncompliance in harsh environments; this unit's compact, NEMA-rated enclosure is designed to withstand demanding settings while delivering reliable performance. It carries UL Listed and CSA Certified safety approvals, aligning with rigorous electrical standards, and its NEMA 12/NEMA 3R compatibility supports both indoor service bays and limited outdoor applications. By combining a rugged painted galvanized steel enclosure with a three-pole design and a 40 A rating, it delivers dependable protection for motors up to 600 V. This makes it a value-focused choice for panel builders and MRO teams seeking fast installation and long-term reliability.
Product Information
Extended Description
ER53040UD Eaton: Eaton enclosed rotary disconnect switch, 40 A, NEMA 12/3R, Painted galvanized steel, Max HP:7.5, 7.5, 20, 25 hp (@208,240,480,600 V), Three-pole, Product category: enclosed rotary non-fusible, R-Series, 600 V
Product Name
Eaton enclosed rotary disconnect switch
Catalog Number
ER53040UD
UPC
786685466057
Product Length/Depth
10.4 in
Product Height
6.7 in
Product Width
7.2 in
Product Weight
6.2 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed CSA Certified
Catalog Notes
NEMA Type 12 enclosures (16–80A) can be field modified to meet NEMA Type 3R rainproof requirements when a factory-provided drain hole is opened.
Enclosure
NEMA 12, NEMA 3R
Enclosure material
Painted galvanized steel
Number of poles
Three-pole
Series
R-Series
Type
Enclosed rotary disconnect
Amperage Rating
40A
HP rating - max
7.5, 7.5, 20, 25 hp (@208,240,480,600 V)
Voltage rating
600 V
Product Category
Enclosed rotary non-fusible
Commercial Distribution, Switching Devices, Volume 2, Tab 1
Switching Devices Flex Center
Eaton Specification Sheet - ER53040UD
Feature: The ER53040UD is a 40 A, three-pole enclosed rotary disconnect with HP ratings up to 7.5/7.5/20/25 hp across 208/240/480/600 V. Business Impact: It provides a robust, non-fusible isolation point that minimizes arc-flash exposure and simplifies motor control wiring in MCCs and switchgear. Application: Ideal for motor control centers and equipment rooms where compact, compliant isolation is needed. Feature: NEMA 12 and NEMA 3R compatibility with painted galvanized steel enclosure. Business Impact: Delivers reliable protection against dust, moisture, and corrosion, reducing maintenance cycles and extending service life. Application: Suitable for indoor environments and select outdoor applications with rain exposure considerations. Feature: Three-pole R-Series enclosed rotary non-fusible design. Business Impact: Standardized Eaton components improve interchangeability and field service efficiency, lowering total cost of ownership. Application: Fits standard control panels and gear trains in industrial facilities. Feature: Compact footprint and lightweight construction (10.4 in L, 7.2 in W, 6.7 in H; 6.2 lb). Business Impact: Saves valuable panel space and simplifies handling during installation and retrofits. Application: Ideal for space-constrained electrical rooms and retrofit projects. Feature: Certifications and warranty. Business Impact: UL Listed and CSA Certified provide regulatory assurance, while a one-year warranty (or 18 months from shipment) reduces risk and downtime during commissioning. Application: Compliance-driven procurement and long-term asset management.
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FAQs
Plan for a three-pole, 40 A device sized for motors up to 600 V. Ensure mounting within a NEMA 12/3R enclosure, maintain adequate clearance for safe operation, and follow Eaton installation guidelines to meet warranty and safety requirements.
It provides 40 A amperage with HP ratings up to 7.5/7.5/20/25 hp at 208/240/480/600 V, a 600 V voltage rating, and three-pole operation in a NEMA 12/3R enclosure.
The unit uses a NEMA 12 enclosure and NEMA 3R compatibility can be achieved via field modification (drain hole) as noted in catalog guidelines for transitioning indoor units to rainproof operation where appropriate.
ER53040UD is UL Listed and CSA Certified, confirming safety compliance for industrial electrical installations.
Warranty is one year from installation or eighteen months from shipment, whichever occurs first, with standard Eaton support options for technical and procurement questions.