Eaton ER3R-400N3PB Rotary Disconnect Switch - NEMA 3R
Part Number: ER3R-400N3PB
Quick Summary
Eaton ER3R-400N3PB rotary disconnect switch provides reliable circuit isolation for industrial control panels. Maintenance and safety teams often struggle with aging disconnects that complicate lockout/tagout and increase downtime. With a non-fused design, pistol-style handle, 600 V rating, 400 A capacity, and CE marking aligned to NEMA 3R enclosures, it reduces fault exposure and supports compliant shutdowns. This makes it a value-driven choice for electrical protection and control applications in industrial plants and outdoor equipment. Engineers rely on its rugged construction and documented data from Bussmann series catalogs to ensure device compatibility during panel modernization projects. The unit also supports easy sourcing through Eaton's catalogs and design references, helping procurement teams reduce lead times.
Product Information
Extended Description
ER3R-400N3PB Eaton: Eaton Bussmann series enclosed rotary disconnect switch, Non-fused, Pistol handle, 600V, 400A, Black, NEMA rating 3R
Product Name
Eaton Bussmann series enclosed rotary disconnect switch
Catalog Number
ER3R-400N3PB
UPC
051712419994
Product Length/Depth
0.001 in
Product Height
0.001 in
Product Width
0.001 in
Product Weight
19 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
400A
NEMA rating
NEMA 3R
Voltage rating
600 V
Special features
Non-fused, Pistol handle
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - ER3R-400N3PB
Feature → Business Impact → Application: The ER3R-400N3PB is a non-fused, pistol-handle rotary disconnect switch rated for 600 V and 400 A, delivering safe, one-handed operation while reducing arc flash exposure. This translates to faster, safer lockout/tagout procedures and lower maintenance costs in mission-critical control panels used in manufacturing and processing facilities. Application: ideal for standalone disconnect points in electrical protection and circuit control setups, including outdoor or harsh environments where NEMA 3R enclosures protect against ingress. Feature → Business Impact → Application: CE marking and a rugged enclosure provide regulatory alignment and long-term reliability, simplifying cross-border procurement and reducing compliance risk across multinational sites. Application: suitable for industrial machinery, power distribution panels, and switchgear housings in factory floors. Feature → Business Impact → Application: documented Bussmann series data and compatibility with Eaton catalogs streamline panel modernization projects, shortening design cycles and improving sourcing accuracy. Application: useful for system upgrades and new builds following standard electrical protection practices. Feature → Business Impact → Application: compact weight specification (19 lb) and standardized dimensions support easier installation, retrofits, and maintenance access in crowded electrical rooms. Application: retrofit projects in existing enclosures where space is at a premium. Feature → Business Impact → Application: non-fused configuration minimizes inventory complexity while allowing coordination with upstream protective devices; engineers can specify this unit as the main disconnect when permitted by system design. Application: main disconnect points in machine control panels and outdoor switchgear installations. Feature → Business Impact → Application: CE compliance and NEMA 3R readiness provide confidence for both European and North American projects, reducing vendor risk and accelerating approvals. Application: global deployments requiring consistent safety and protection standards.
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FAQs
The ER3R-400N3PB fits typical industrial control panel footprints with a 600 V, 400 A rating and a pistol-style handle for one-handed operation. Its non-fused design simplifies wiring schemes when coordination with upstream breakers is already in place, and the NEMA 3R enclosure supports reliable installation in both indoor and outdoor panels.
Key specifications include a 600 V voltage rating and 400 A amperage rating, enabling it to serve as a main or sectional disconnect. The device is CE marked and rated for NEMA 3R enclosures, suitable for environments that require protection against rain, dust, and other outdoor contaminants while maintaining safe isolation functions.
Yes. The NEMA 3R enclosure rating indicates suitability for outdoor use and harsh indoor environments. The combination of a robust enclosure, non-fused operation, and CE marking provides reliable performance in weather-exposed switchgear applications and rugged industrial sites.
The unit carries CE marking for European compliance and is designed to meet the protection levels required by NEMA 3R enclosures. This combination supports regulatory acceptance across regions and helps streamline project approvals for multinational installations.
Non-fused operation reduces fuse-related maintenance and inventory complexity, while the rugged enclosure and reliable isolation minimize downtime during servicing. The pistol handle enables quick, safe disconnections, speeding maintenance workflows and improving overall equipment availability in continuous-process environments.