Overview
The Allen-Bradley 1492-SP2B050 is a 2-pole supplementary protector miniature circuit breaker engineered for reliable overcurrent protection in industrial and commercial electrical systems. Part of the Bulletin 1492-SP series, this breaker features Type B tripping characteristics and a 50-ampere rated current, making it suitable for precise protection of equipment and electrical loads in control panels, automation systems, and power distribution applications.
Key Features
- 2-Pole Configuration: Two-pole units are connected at the handle for simultaneous operation, ensuring coordinated protection across both phases.
- Type B Trip Curve: Provides magnetic trip activation at lower thresholds, suitable for circuits with minimal inrush current (resistive loads, lighting, heaters).
- Screw Termination: Screw termination is standard on all Bulletin 1492-SP units. Both line and load side terminals accept #16…4 AWG (1.5…25 mm²) copper wire.
- Industry Certifications: Meets the requirements of UL 1077/CSA 22.2 No. 235 and conforms to IEC/EN 60 898, 60 947-2.
- Compact Design: Dimensions of 88 x 69 x 17.5 mm make it ideal for space-constrained applications.
- Bus Bar Compatible: A bus bar may be used for all 1492-SP Miniature Circuit Breakers, simplifying panel assembly.
Technical Specifications
- Manufacturer: Allen-Bradley / Rockwell Automation
- Model: 1492-SP2B050
- Poles: 2
- Rated Current: 50 A
- Trip Characteristic: Type B
- Line/Load Wire Size: #16…4 AWG (1.5…25 mm²)
- Termination Type: Screw
- Dimensions: 88 × 69 × 17.5 mm
- Certifications: UL 1077, CSA 22.2 No. 235, IEC/EN 60 898, IEC 60947-2
- Tripping Reference Temperature: 30 °C
- Condition: New in Box
Typical Applications
- Industrial control panels protecting motors, solenoids, and actuators
- Power supply and controller I/O protection
- HVAC equipment and lighting circuits
- Automation systems requiring precise overcurrent detection
- Supplementary protection in electrical distribution systems
- Equipment with low inrush current and steady-state operation
Compatibility & Replacements
Compatible With
- Allen-Bradley control panel layouts and DIN rail mounting systems
- Standard electrical bus bar assembly systems (copper bus bars, 1 m length cuttable)
- Industrial automation equipment requiring UL 508 listed protection components
- AC power systems rated for Type B supplementary protection
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering, as direct drop-in replacement depends on your specific panel layout and circuit requirements.
Works With
- Rockwell Automation PLCs and control modules (as supplementary overcurrent protection)
- Industrial automation control systems utilizing bus bar assembly methods
- Electrical systems designed for IEC/EN 60 898 and CSA C22.2 No. 235 compliance
- Panel-mounted accessory modules and lockout attachments (sold separately)
