Eaton RB304A RhinoBox Power Distribution Unit - cETLus NOM
Part Number: RB304A
Quick Summary
The Eaton RB304A RhinoBox power distribution unit is a rugged, weatherproof solution for outdoor electrical distribution in harsh industrial environments. This unit addresses field reliability issues caused by moisture, dust ingress, and physical exposure by delivering a durable enclosure with robust construction. With a NEMA 3R rating and cETLus NOM certification, the RB304A provides dependable protection where weather exposure is routine. Featuring 50A capacity, 120/240V operation, and a COMB AutoRes configuration, it supports scalable distribution at the point of use. For engineers and procurement teams, this RhinoBox translates to lower maintenance costs, faster installation, and improved uptime across outdoor equipment enclosures and portable control stations.
Product Information
Extended Description
RB304A Eaton: Eaton RhinoBox power distribution unit, 50A, Weatherproof, NEMA 3R, COMB AutoRes, Cold-rolled 18 gauge steel, 120/240V
Product Name
Eaton RhinoBox power distribution unit
Catalog Number
RB304A
EAN
7501029783798
Product Length/Depth
22.25 in
Product Height
11.125 in
Product Width
16.25 in
Product Weight
37 lb
Certifications
cETLus NOM
Type
Rhinobox
Amperage Rating
50A
Color
Red
Devices per circuit
1
Material
Cold-rolled 18 gauge steel
NEMA configuration
COMB AutoRes
NEMA type
3R
Voltage rating
120/240 V
Environmental conditions
Weatherproof
Reset type
Automatic reset
Weatherproof protection and rugged construction reduce downtime in outdoor environments, enabling reliable power distribution for equipment and enclosures across job sites. This translates to fewer weather-related failures and longer service life for critical loads. The 50A rating and 120/240V capability support scalable power distribution for medium-duty automation equipment while maintaining compatibility with common industrial receptacles and feeders, improving installation flexibility and reducing the need for separate subpanels. COMB AutoRes simplifies wiring by delivering a consolidated configuration that accommodates a single-device-per-circuit approach, speeding setup and improving fault isolation during commissioning. Built from cold-rolled 18 gauge steel, the enclosure delivers structural integrity and visible red branding for quick site recognition and access control, which improves safety workflows. Automatic reset enhances personnel safety and system continuity by enabling rapid recovery after trips, reducing manual maintenance. The unit’s dimensions and weight are engineered for easy field handling and straightforward mounting in constrained spaces, supporting efficient integration into portable or fixed outdoor power infrastructure.
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FAQs
RB304A installs in outdoor enclosures with standard mounting patterns compatible with its dimensions (22.25 in L x 16.25 in W x 11.125 in H). It supports 120/240V service at up to 50A, with a single device per circuit configuration (COMB AutoRes) for straightforward wiring. Ensure proper clearance for ventilation and access, and follow local electrical codes during field connections.
RB304A is rated for 50A and 120/240V operation, providing sufficient headroom for mid-range outdoor loads. The COMB AutoRes configuration simplifies circuit organization, while automatic reset enables quick recovery after a fault without manual intervention. These features reduce downtime, streamline maintenance, and support reliable, continuous operation in outdoor environments.
Industries such as construction, outdoor machinery ops, process automation, and outdoor control panels benefit from RB304A. Its weatherproof NEMA 3R enclosure protects sensitive equipment in harsh environments, while the 50A/120/240V capability supports common industrial loads. The unit is well-suited for portable or fixed installations requiring durable, compliant power distribution in outdoor settings.
RB304A carries cETLus NOM certification and a NEMA 3R weatherproof designation, ensuring safety and performance in outdoor, non-enclosed, and damp environments. These certifications help meet regulatory requirements, simplify compliance during audits, and give engineers confidence in long-term reliability for outdoor electrical infrastructure.
Deploying RB304A reduces maintenance frequency through rugged weatherproofing and reliable automatic reset, lowering total cost of ownership. Its durable cold-rolled steel construction and compact footprint save space and improve installation speed, while the 50A/120/240V capability supports scalable power distribution, enabling higher uptime and faster project execution with fewer field modifications.