Eaton ER4P-100J3PR Enclosed Rotary Disconnect - NEMA 4P
Part Number: ER4P-100J3PR
Quick Summary
Eaton ER4P-100J3PR enclosed rotary disconnect switch provides safe, code-compliant isolation for service panels and motor control centers. Engineers often confront downtime and maintenance challenges when accessing crowded enclosures to disconnect circuits. With CE marking, a rugged NEMA 4P enclosure, and a 600 V, 100 A rating, this unit supports durable, compliant installations in harsh environments. The design also leverages fuse type J compatibility and a pistol-style handle for fast, secure operation, delivering reliability and efficiency for ongoing maintenance and safe outages. In practice, this translates to improved uptime, reduced risk during disconnection, and seamless integration with standard Bussmann series protection in industrial sites.
Product Information
Extended Description
ER4P-100J3PR Eaton: Eaton Bussmann series enclosed rotary disconnect switch, Fuse type J, Pistol handle, 600V, 100A, Red, NEMA rating 4P
Product Name
Eaton Bussmann series enclosed rotary disconnect switch
Catalog Number
ER4P-100J3PR
UPC
051712415859
Product Length/Depth
12 in
Product Height
12.25 in
Product Width
7.5 in
Product Weight
11.24 lb
Warranty
Not Applicable
Compliances
CE Marked
Amperage Rating
100A
NEMA rating
NEMA 4P
Voltage rating
600 V
Special features
Fuse type J, Pistol handle
ER4P-100J3PR~ENC DISC100J NEMA4XPL RED
ER4P-100J3PR~ENC DISC100J NEMA4XPL RED
Eaton Specification Sheet - ER4P-100J3PR
Feature → Business Impact → Application: Enclosed rotary disconnect switch design provides a dedicated isolation point, enabling safe maintenance and service shutdowns while protecting personnel and equipment. This approach reduces downtime and enhances regulatory compliance in control panels and motor control centers, especially in facilities using Bussmann series fuse protection. Application: suitable for MCCs and switchgear where robust environmental protection and clear visual isolation are required. Feature → Business Impact → Application: Fuse type J compatibility supports selective protection coordination, minimizing nuisance fuse trips and improving system reliability. Application: ideal for circuits requiring fast, reliable fuse protection in rugged environments. Feature → Business Impact → Application: Pistol handle operation offers ergonomic, one-handed control with positive engagement, reducing operator fatigue and misoperation. Application: efficient field disconnections in maintenance windows or emergency shutdowns. Feature → Business Impact → Application: 600 V, 100 A rating ensures compatibility with common industrial power architectures, enabling straightforward integration with existing electrical protection schemes. Application: service disconnects in switchgear and industrial machinery. Feature → Business Impact → Application: NEMA 4P enclosure provides superior protection against dust, water, and ingress, safeguarding internal components and extending service life. Application: outdoor-rated or harsh indoor environments, including manufacturing floors and wash-down areas. Feature → Business Impact → Application: CE marking demonstrates compliance with international safety standards, expanding market acceptance and reducing certification delays. Application: global installations and procurement programs requiring recognized conformity.
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FAQs
The ER4P-100J3PR is designed for standard electrical protection configurations with Bussmann series protection. It fits typical MCCs and switchgear footprints that support 600 V, 100 A disconnects and NEMA 4P enclosures. When retrofitting, verify enclosure dimensions, mounting clearances, and torque specs for the pistol handle and mounting bolts to maintain UL/CE compliance and safe operation.
Key specs to consider are 600 V rating, 100 A amperage, NEMA 4P enclosure, and fuse type J compatibility. The 12 in length, 12.25 in height, and 7.5 in width define its footprint for panel cutouts. The CE marking confirms compliance, while the pistol handle aids ergonomic operation. These factors together support reliable isolation and reduced maintenance time in MCCs.
Yes. The NEMA 4P enclosure rating provides robust protection against dust, water ingress, and corrosion exposure typical in industrial spaces. This makes the ER4P-100J3PR appropriate for outdoor installations or wash-down areas where reliable isolation and enclosure integrity are required, aligning with CE compliance and rugged Bussmann series protection.
Routine inspection should focus on enclosure integrity, handle operation, and fuse protection status. The pistol handle should move smoothly with positive engagement, and the fuse type J connection must be clean and secure to prevent mis-trips. Regular checks help maintain safety margins and extend service intervals without compromising protection standards.
Upgrading to a CE-marked, NEMA 4P-rated disconnect with clear isolation points and ergonomic operation reduces maintenance time, minimizes downtime during outages, and improves worker safety. The 600 V/100 A specification aligns with common industrial power architectures, enabling quicker integration and fewer compatibility issues, delivering measurable uptime and safety improvements.