Eaton ER12-400J3PB Enclosed Rotary Disconnect Switch - NEMA 12
Part Number: ER12-400J3PB
Quick Summary
The Eaton ER12-400J3PB Enclosed Rotary Disconnect Switch is a rugged isolation device for 600 V electrical systems up to 400 A in industrial panels. Maintenance teams often face safety risks during lockout and servicing, so a robust enclosure and clear operability are essential. With CE Marked compliance and a NEMA 12-rated enclosure, it delivers reliable protection against dust and moisture in harsh environments. Designed for panel builders and machine OEMs, it simplifies installation, reduces downtime, and helps meet safety and regulatory requirements across demanding applications. Its pistol handle and fuse-class J features further enhance operator safety and circuit protection.
Product Information
Extended Description
ER12-400J3PB Eaton: Eaton Bussmann series enclosed rotary disconnect switch, Fuse class J, Pistol handle, 600V, 400A, Black, NEMA rating 12
Product Name
Eaton Bussmann series enclosed rotary disconnect switch
Catalog Number
ER12-400J3PB
UPC
051712416115
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 12
Voltage rating
600 V
Special features
Fuse class J, Pistol handle
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - ER12-400J3PB
Feature: Enclosed rotary disconnect switch delivers robust environmental protection with a NEMA 12 enclosure, shielding active components from dust, splashes, and corrosion in challenging production areas. Business impact: This reduces unscheduled downtime due to contamination and lowers maintenance costs by extending service intervals. Application: Ideal for service entrances, main feeders, and panel protection in metal fabrication, packaging lines, and processing facilities. Feature: Fuse class J compatibility ensures appropriate short-circuit protection aligned with Bussmann series fuses. Business impact: It minimizes nuisance trips and simplifies fuse coordination across the plant electrical distribution. Application: Works in tandem with Eaton Bussmann fuses within switchgear and motor control centers to meet safety standards and improve reliability. Feature: Pistol handle design provides ergonomic, safe operation and positive isolation during switching. Business impact: Enhances operator safety, reduces the risk of accidental actuation, and speeds up switch operations in shutdown sequences. Application: Especially beneficial during routine maintenance and emergency isolation in dense panel layouts. Feature: 600 V voltage rating and 400 A continuous current rating handle demanding industrial loads. Business impact: Supports heavy-duty circuits and reduces the number of devices required for large installations, cutting total installed cost. Application: Suitable for motor control centers, switchgear cabinets, and high-demand feeders in manufacturing environments. Feature: CE marking confirms compliance with European safety directives, aiding global deployment. Business impact: Streamlines cross-border procurement and reduces compliance risk for integrators. Application: Useful for projects across Europe, the Americas, and APAC where CE conformity matters. Feature: Plug-and-play compatibility with Bussmann series catalogs and standard mounting footprints facilitates quick field installation. Business impact: Slashes commissioning time and helps maintain a consistent protection scheme across panels. Application: Compatible with common switchgear configurations and OEM enclosures, enabling faster deployment in new builds or retrofits.
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FAQs
To install, mount the unit inside a compatible enclosure and secure it to the panel frame, connect the feed and load terminals with correctly rated lugs, and verify the pistol-style handle actuates fully to positive isolation. Adhere to CE conformance guidance, confirm a NEMA 12 enclosure environment, and ensure fuse-class J compatibility is maintained with the Bussmann series. Always de-energize the circuit and follow lockout-tagout procedures before work.
The ER12-400J3PB is rated for 600 V and 400 A, with a NEMA 12 enclosure and fuse class J compatibility. These ratings support high-current isolation for heavy-duty feeders and MCCs while providing reliable ingress protection. Performance benefits include safe circuit interruption, coordinated overcurrent protection, and suitability for demanding industrial loads typical in manufacturing or processing facilities.
Yes. The NEMA 12 enclosure protects against dust and moisture, making it well-suited for MCCs and main feeders in dusty or humid environments. Its fuse-class J compatibility and robust pistol handle support safe, reliable operation during routine maintenance and emergency isolation, helping to minimize downtime and maintain continuity of critical processes in industrial settings.
The ER12-400J3PB carries CE marking for European safety compliance and features a NEMA 12 enclosure rating for environmental protection. It also includes fuse-class J compatibility and a pistol-style operating handle to support safe, compliant operation in regulated installations across various regions.
Reliability comes from a rugged enclosure and positive isolation, reducing the likelihood of contamination-driven faults. The unit's durable design minimizes downtime and maintenance frequency, while CE and NEMA 12 compliance simplify multi-site deployment. Overall, customers benefit from lower lifecycle costs and faster commissioning in new builds or retrofits.