UL489 Miniature Breakers  (Branch-Circuit Protection)

Miniature UL489 Breakers PDF 

Overview

WEG UL489 miniature circuit breakers provide true branch-circuit protection for industrial and commercial panels. Built on robust thermal-magnetic technology in a compact DIN-rail package, they safely interrupt overloads and short-circuits at the source—helping you meet code, protect equipment, and minimize downtime.

Key Benefits

• UL 489 Listed for branch-circuit protection in accordance with the NEC
• Thermal-magnetic trip for dependable response to both overloads and faults
• Compact DIN-rail footprint to maximize panel density and speed installation
• Multiple pole options and ratings to match common AC/DC applications
• Clear status indication with positive trip and easy reset
• Accessory-ready (auxiliary signaling, shunt/undervoltage releases, lockout solutions*)
• Selective, coordinated protection with downstream devices for faster fault isolation

*Accessory availability varies by model/series.

Typical Applications

• Feeder and branch circuits in control panels and OEM machinery
• Protection for power supplies, control transformers, and distribution rows
• HVAC, building automation, lighting, and receptacle circuits
• Conveyors, packaging equipment, pumps, and process skids

Why WEG

• Reliability you can specify: Durable construction and consistent trip performance
• Panel-builder friendly: Standardized terminals, clear markings, and quick DIN-rail mounting
• Global partner: WEG’s worldwide support and product availability

UL489 vs. UL1077: UL489 breakers are intended for branch-circuit protection and can serve as the primary overcurrent device. UL1077 devices are supplementary protectors used within equipment and must be installed downstream of a UL489 device.

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