Eaton ER12-400N3PB Enclosed Rotary Disconnect - NEMA 12
Part Number: ER12-400N3PB
Quick Summary
The Eaton ER12-400N3PB is an enclosed rotary disconnect switch used for safe isolation of electrical circuits in industrial panels. It reduces downtime by providing reliable, non-fused isolation that technicians can operate quickly with a pistol handle. This unit is CE marked and designed to fit within NEMA 12 enclosures, protecting controls in dusty industrial spaces. For electrical protection in control panels, it offers reliable isolation, safety, and quick maintenance, supporting CE compliance and safe operations. Engineers appreciate the pistol-style handle for ergonomic operation in tight panels. Procurement benefits from its standard cataloging, CE compliance, and compatibility with existing electrical protection gear.
Product Information
Extended Description
ER12-400N3PB Eaton: Eaton Bussmann series enclosed rotary disconnect switch, Non-fused, Pistol handle, 600V, 400A, Black, NEMA rating 12
Product Name
Eaton Bussmann series enclosed rotary disconnect switch
Catalog Number
ER12-400N3PB
UPC
051712420389
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
Non-fused, Pistol handle
Bussmann series complete full line catalog no. 1007
Bussmann series complete full line catalog no. 1007
Eaton Specification Sheet - ER12-400N3PB
Feature: Non-fused operation with a pistol-style handle. Business Impact: Simplifies operator interaction, reduces arc-flash exposure risk, and minimizes maintenance steps. Application: Ideal for rapid, safe isolation in routine panel tests and machine stop/start sequences in manufacturing lines. Feature: 600 V, 400 A rating. Business Impact: Supports high-current motor disconnects without overheating, enabling reliable protection for heavy loads. Application: Suitable for motor control circuits and high-demand control panels in processing facilities. Feature: NEMA 12 enclosure compatibility. Business Impact: Provides dust and water protection for indoor installations, lowering replacement costs due to ingress damage. Application: Perfect for machine rooms and service enclosures in harsh indoor environments. Feature: Enclosed rotary design. Business Impact: Delivers durable, safe isolation with predictable performance under vibration and dust exposure. Application: OEM panel builds and retrofit projects where enclosure integrity matters. Feature: CE Marked. Business Impact: Supports European regulatory compliance and cross-border deployment, reducing qualification time for projects. Application: Global manufacturing sites needing consistent electrical protection standards. Feature: Compact, integrated form with standard mounting. Business Impact: Speeds up installation and reduces field wiring complexity, cutting commissioning time. Application: Retrofit and new builds in control panels where space is at a premium.
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FAQs
Installation involves confirming the enclosure supports NEMA 12 protection, mounting the disconnect in a standard panel opening, wiring the line and load conductors to the provided terminals, and securing with the included fasteners. Because it is non-fused, ensure the system downstream is rated for the current and that safety interlocks or lockout/tagout procedures are in place. The pistol handle enables ergonomic operation during commissioning and maintenance.
With a 400 A amperage rating and a 600 V voltage rating, the ER12-400N3PB is designed to safely interrupt heavy motor loads. Its non-fused design reduces fault propagation risk, while the NEMA 12 enclosure protects internal components from dust and moisture. This combination supports reliable startup/shutdown sequences in industrial drive systems and reduces unplanned downtime.
Yes. The device carries a NEMA 12 enclosure rating, which provides protection against dust and water ingress in indoor industrial environments. While it is not listed with an IP rating, the NEMA 12 standard offers robust enclosure protection for typical manufacturing floors, machine rooms, and control cabinets where moisture or dust could affect operation.
The ER12-400N3PB is CE marked, indicating compliance with applicable European electrical safety and performance standards. This designation supports export and cross-border deployment within CE markets. Users should verify any local regulatory requirements beyond CE for their specific installation and service conditions.
ROI benefits come from reduced downtime due to reliable, quick isolation and safer operation with the pistol handle. The non-fused design minimizes intrusive maintenance steps, while CE compliance and NEMA 12 enclosure protection help prevent enclosure-related failures. Together, these factors lower total cost of ownership in control panels and motor protection schemes.