High-Capacity Protection for Demanding Switchboard ApplicationsThe Eaton Magnum SB SBS630 is a 3000-ampere low-voltage insulated-case power circuit breaker, part of the renowned Magnum SB series listed under UL 1066. Engineered for UL 891 switchboards, this breaker delivers exceptional performance, coordination, and safety for large-scale commercial, industrial, and utility applications.
With a continuous current rating of 3000A and a robust 65 kA interrupting rating at 508 Vac (up to 100 kA for higher-duty versions), the SBS630 provides reliable fault protection in critical power distribution systems. Its short-time withstand rating of 50 kA ensures excellent coordination with downstream devices, minimizing nuisance tripping while maintaining system selectivity.
Key Specifications – SBS630
| Specification | Detail |
| Model | SBS6303HEA3052 NMNNNENNNAX |
| Frame Type | Standard Frame |
| Continuous Current | 3000 A |
| Interrupting Rating (508 Vac) | 65 kA |
| Interrupting Rating (635 Vac) | 65 kA |
| Short-Time Withstand | 50 kA |
| Fixed Instantaneous Trip | 18 x Iₙ |
| Pole Configuration | Three-pole (standard) |
| Mounting Type | Drawout (configuration dependent) |
Advanced Digitrip™ Protection & Diagnostics
Equipped with the Digitrip™ RMS trip unit, the SBS630 offers comprehensive protection and monitoring capabilities:
Programmable Overcurrent Protection – Adjustable long-time, short-time, instantaneous, and ground-fault settings
Power Metering – Ampere and power readings with power quality analysis
Local Display – Real-time information and diagnostic data at the breaker
Communication – Translators to Modbus, INCOM™, and PROFIBUS® protocols for integration with building management systems
Zone Selective Interlocking – Enhanced coordination to isolate faults with minimal system impact
Arcflash Reduction Maintenance System™ – Reduces arc flash incident energy during maintenance operations.
Breaker Health Monitoring – Continuous assessment of contact wear and mechanical condition
Designed for Safety & Reliability
UL 1066 Listed – Meets stringent standards for low-voltage power circuit breakers.
UL 891 Switchboard Compatible – Optimized for switchboard-class applications
100% Rated – Full continuous current capability without derating
Closed-Door Levering – Safe racking operations with the door closed
Fixed Internal Instantaneous Trip – Ensures fault clearing within three cycles
100% Rated at Full Continuous Current – No derating required across the operating temperature range
Applications
Main and feeder protection in UL 891 switchboards
Large industrial power distribution systems
Commercial high-rise buildings and data centers
Utility and substation auxiliary power
Oil, gas, and petrochemical facilities
Marine and offshore installations
Maintenance & Serviceability
The SBS630 features primary disconnecting contacts mounted directly on the breaker for easy inspection and replacement without removing the entire unit. All accessories are field-installable and UL-approved, allowing for quick modifications at the point of use.
Eaton Magnum SB SBS630 Breaker3000 Amp SBS6303HEA3052 NMNNNENNNAX* New-TakeOut *
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