Allen-Bradley 1489-A1D010 - 1A, 277VAC, 1-Pole, Circuit Breaker

Meet the Allen-Bradley 1489-A1D010 — a purpose-built 1A, 277VAC, 1-Pole circuit breaker designed to shield critical circuits in demanding industrial environments. This compact, single-pole device delivers dependable overcurrent protection where it matters most, helping keep distribution panels and motor control centers safe and reliable.

Key specifications

• Current rating: 1A
• Voltage rating: 277VAC
• Poles: 1-Pole
• Type: Circuit Breaker

Ideal applications

• Panelboards, switchboards, and control panels that serve commercial or industrial facilities
• Distribution panels and motor control centers where precise protection for low-current circuits is required
• 277V electrical systems common to lighting feeders, control circuits, and small-load applications
• OEM equipment and integration projects needing a reliable, low-amperage protective device

What makes this unit stand out

• Targeted protection for low-current circuits: With a 1A rating at 277VAC, this breaker is optimized for small loads, reducing unnecessary trips while safeguarding wiring and devices.
• Versatile 1-Pole design: A compact form factor that fits neatly in standard industrial enclosures, enabling flexible deployment across panelboards, switchboards, and control panels.
• Reliable protection in demanding environments: Built for industrial, commercial, and OEM settings where consistent overcurrent protection is essential to safe operation of distribution networks and MCCs.
• Seamless integration with existing installations: Ideal for upgrading or replacing mismatched protection devices in 1489-series lineups or legacy 1P, 277V circuits without extensive rewiring.

Practical guidance for selection and use

Choosing the right protection device is about matching the load profile to the breaker’s rating. The 1489-A1D010 is purposefully tuned for circuits that require modest current protection at 277V, making it a strategic choice for lighting feeders and control circuits within commercial facilities and equipment racks. When sizing the protection for a panel or MCC, verify that the connected circuitry operates safely below the 1A threshold under normal conditions, and anticipate potential startup surges that the 1P design is intended to handle without compromising overall protection.

Installation tips for best results:

• Ensure the breaker’s voltage and current ratings align with the targeted circuit (277VAC nominal, 1A load or below).
• Use in panelboards, switchboards, or control panels that accept 1-Pole protective devices from the same family or compatibility range.
• In OEM assemblies, confirm that downstream devices (relays, contactors, small motors) are sized to operate within the breaker’s protection envelope.
• When replacing an existing device, opt for a like-for-like 1489-series replacement to preserve panel layout and electrical clearance requirements.

Designed for professionals who demand trustworthy overcurrent protection in distribution networks, the Allen-Bradley 1489-A1D010 delivers precise, dependable performance for 1A, 277VAC circuits. Whether you’re reinforcing a control panel, expanding a switchboard, or upgrading an MCC feeder, this 1-Pole circuit breaker provides a clear, purpose-built solution that keeps your electrical system safe and ready for everyday operation.