Overview
The Allen-Bradley 1492-CB1 /B is a single-pole supplementary protector engineered for industrial automation and control applications requiring 277V AC protection. This compact circuit breaker is DIN rail mountable and provides precise overcurrent protection for sensitive equipment in industrial and commercial electrical systems.
Key Features
- Current-limiting design: Reduces let-through-current and resulting let-through-energy that can damage protected components
- Rapid fault interruption: Ability to interrupt short circuit current within the first half cycle of the fault
- 1-pole configuration for single-phase 277V AC circuits
- Screw terminal construction for easy field wiring and bus bar compatibility
- Compact footprint for efficient panel space utilization
- Type C magnetic trip characteristic activated at 5–10 times the rated current
Technical Specifications
The 1492-CB1 series is available in multiple current ratings. The /B designation indicates Series B manufacture. 1-pole configuration rated 277V AC, 1-phase. Current ratings include 0.5A, 1A, 1.5A, 2A, 3A, 4A, 5A, 6A, 7A, 8A, 10A, 12A, 15A, and higher in the series.
Typical Applications
- Motor control circuits and soft-starter protection
- Lighting loads in commercial and industrial facilities
- Power supply and transformer protection
- Control panel branch circuit overcurrent protection
- Industrial automation equipment and machinery control
Compatibility & Replacements
Compatible With
- Standard DIN rail mounting systems (35 mm rail)
- Allen-Bradley control panels and enclosures
- Industrial automation systems requiring supplementary protection
- Single-phase 277V AC electrical distribution
- Systems requiring UL 1077 and CSA C22.2 No. 235 compliant protection
Replaces / Drop-In Replacement For
The 1492-CB1 /B directly replaces other 1492-CB1 units with matching current ratings and voltage specifications. 1492-CB1 series includes models such as 1492-CB1F, 1492-CB1G, and 1492-CB1H variants across various current ratings. Verify your specific current rating (e.g., 1492-CB1G010, 1492-CB1G100) before ordering a replacement. Always confirm compatibility with your system integrator before ordering.
Works With
- Compliant with UL 1077/CSA 22.2 No. 235, IEC/EN 60898 and IEC 60947-2 standards
- Bus bar wiring solutions for multi-pole applications
- Accessory contact modules and auxiliary switches (ordered separately)
- Standard industrial PLC and motor control systems
