Eaton RB300A RhinoBox - Power Distribution Unit, NEMA 3R

Part Number: RB300A
Manufacturer
Eaton
Part number
RB300A

Quick Summary

Eaton RhinoBox RB300A power distribution unit delivers rugged, weatherproof electrical distribution for industrial environments. For engineers and maintenance teams, outdoor deployments often fail due to moisture ingress, corrosion, or overloads—creating costly downtimes. With cETLus NOM certification and a NEMA 3R rating, this unit is designed for reliable operation in wet or dusty conditions, improving safety and uptime. The RB300A also supports easy integration with existing enclosures and electrical infrastructure, helping contractors and OEMs reduce installation time and ensure compliant, scalable power distribution across facilities. In short, it combines robust protection with practical installation benefits for industrial power layouts.

Product Information

Extended Description

RB300A Eaton: Eaton RhinoBox power distribution unit, 50A, Weatherproof, NEMA 3R, DUPX AutoRes, Red, Cold-rolled 18 gauge steel, 120/240V
Product Name
Eaton RhinoBox power distribution unit
Catalog Number
RB300A
UPC
032664677526
Product Length/Depth
22.7 in
Product Height
12.4 in
Product Width
16.8 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
DUPX AutoRes
NEMA type
3R
Voltage rating
120/240 V
Environmental conditions
Weatherproof
Reset type
Automatic reset
NEMA Rating
3R
Feature → Business Impact → Application: The RB300A offers a 50A amperage rating in a cold-rolled 18 gauge steel enclosure, delivering reliable current supply while withstanding harsh environments. This translates to reduced overheating risk and improved service continuity on the factory floor and outdoor job sites, where equipment demand can spike. Application: ideal for temporary or permanent power distribution within outdoor enclosures and rugged plant settings. Feature → Business Impact → Application: NEMA 3R weatherproof rating paired with automatic reset enhances safety and uptime by protecting circuits from moisture and allowing automatic recovery after overloads. This is critical for facilities requiring continuous operation with minimal manual intervention, such as outdoor tool stations or outdoor machinery bays. Application: outdoor electrical cabinets in manufacturing lines, construction sites, and weather-exposed equipment rooms. Feature → Business Impact → Application: DUPX AutoRes configuration and a single-device-per-circuit layout simplify wiring, reduce installation errors, and speed field wiring during panel builds. Application: OEM panel fabrication, electrical contractors, and system integrators seeking efficient, scalable power distribution. Feature → Business Impact → Application: 120/240V dual voltage capability supports a range of motors, tools, and control circuits, enabling flexible system design and reducing the need for multiple adapters. Application: mixed-volt machinery fleets and multi-use industrial environments. Feature → Business Impact → Application: high-visibility red color aids rapid identification and safer operation in crowded or low-light spaces, cutting switch-and-wire mistakes. Application: maintenance bays, outdoor facilities, and service vans. Feature → Business Impact → Application: cETLus NOM certification confirms regulatory compliance, while the rugged enclosure protects components, supporting audits and installation in regulated facilities. Application: food & beverage, pharmaceuticals, and general manufacturing environments requiring formal conformity.

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FAQs

The RB300A is designed for outdoor and harsh indoor environments with a NEMA 3R weatherproof enclosure. Install on a level surface or mounting plate, ensure proper wiring per 120/240V circuits, and verify clearances for ventilation and access. Use recommended mounting hardware and follow local electrical codes for a compliant setup.
RB300A carries cETLus NOM certification and a NEMA 3R rating, indicating regulatory compliance and reliable weatherproof protection. These certifications help ensure safety, reduce regulatory risk, and support audits for facilities requiring durable outdoor power distribution.
Yes. With a weatherproof NEMA 3R enclosure, cold-rolled steel construction, and a 50A rating, RB300A is well-suited for outdoor enclosures, weather-exposed equipment bays, and temporary or permanent power distribution at outdoor facilities.
Key specs include 50A amperage rating, 120/240V voltage rating, NEMA 3R protection, and a DUPX AutoRes configuration. It is built from cold-rolled 18 gauge steel and is color-coded red for visibility.
DUPX AutoRes provides automatic restoration after a fault, reducing manual intervention and downtime. This is particularly beneficial in busy facilities where quick recovery from overloads minimizes production impact and keeps line uptime high.