Overview
The Allen-Bradley 1489-A2D020 /A is a DIN rail-mounted miniature circuit breaker designed for branch circuit protection in industrial control and automation applications. Rated at 2 amps, 2-pole, with a maximum voltage of 480Y/277V AC, this thermal-magnetic breaker delivers dependable overcurrent and short-circuit protection in demanding environments. Approved for use in North America (UL489 and CSA), this breaker is part of the proven 1489-A series family.
Key Features
- 2-Pole Configuration: Protects dual-phase circuits with synchronized trip action across both poles
- 2 Amp Rating: Suitable for low-current branch circuits and sensitive loads
- 480Y/277V Rating: Compatible with three-phase delta and wye configurations common in industrial plants
- Thermal-Magnetic Protection: Combines thermal overload detection with magnetic fault response for fast, reliable trip action
- UL489 & CSA Certified: Meets North American electrical safety standards for miniature circuit breaker applications
- DIN Rail Mounting: Compact footprint for integration into control panels and distribution boards
Technical Specifications
- Ampere Rating: 2 A
- Pole Configuration: 2-Pole
- Voltage Rating: 480Y/277V AC
- Trip Curve Type: Type D (per IEC standard)
- Certifications: UL489, CSA 22.2 No. 5.1
- Mounting Type: DIN Rail
- Weight: 0.261 kg (0.575 lb)
- Country of Origin: Spain
- Series: 1489-A Thermal Magnetic Breaker
- Status: Discontinued by manufacturer (2014)
Typical Applications
The 1489-A2D020 is used in a wide range of industrial and commercial settings where compact, reliable circuit protection is required:
- Industrial control panels and motor starter circuits
- Machine tool automation and CNC equipment protection
- Low-current DC and AC branch circuits in 480V/277V systems
- Pump and fan motor branch circuits
- Conveyor and material handling equipment circuits
- Building automation and HVAC control circuits
Compatibility & Replacements
The 1489-A2D020 /A has been discontinued by Allen-Bradley/Rockwell Automation as of April 2014. For new installations or direct replacements, consider modern equivalents such as the 1489-M2D020 (updated 1489-M series miniature breaker with Type D trip curve) or other current-production Allen-Bradley thermal-magnetic breakers in the 2A, 2-pole range. This unit remains a viable used/surplus component for legacy system maintenance and repair applications where original part compatibility is essential. Verify load requirements and application voltage compatibility before substitution.
