Ls Electric 626044663 Mcb 20A 1P 277VAC UL489 D Curve

Product Description

The LS ELECTRIC 626044663 is a single-pole miniature circuit breaker (MCB) rated for 20 amps at 277VAC, built to the UL489 standard for branch circuit protection. It features a D trip curve and a short-circuit interrupting capacity of 10 kiloamps (kA), making it suitable for loads with high inrush currents such as motors, transformers, and solenoids. Part of the BK Series from LS ELECTRIC (formerly LSIS, formerly LG Industrial Solutions), this breaker is installed by licensed electricians in panel boards and load centers where reliable overcurrent protection is required. It weighs 0.5 pounds.

The 626044663 is intended for branch circuit protection in commercial and light industrial electrical systems operating at 277VAC single-phase. The D curve trip characteristic provides a delayed response to overload conditions, accommodating high inrush loads without nuisance tripping. Typical installations include motor branch circuits, lighting circuits fed from 480Y/277V distribution systems, and industrial control panels. This MCB is part of the BK63HU series, which is available in 1, 2, 3, and 4 poles, B, C, and D trip curves, and amp ratings from 1 to 63 amps.

Key Features

• UL489 listed for branch circuit protection applications
• D trip curve handles high inrush loads without nuisance tripping
• 10kA short-circuit interrupting capacity for robust fault protection
• Single-pole configuration rated at 20 amps and 277VAC
• Part of the BK63HU series, available in multiple pole counts and trip curves
• 2.5-year manufacturer warranty

Compatibility

This part replaces alternate part number BK63HU 1P D20A 10kA 120/240VAC UL489 (formerly cataloged as 0626041563). It is part of the BK63HU series and is compatible with panel boards and load centers accepting standard UL489 miniature circuit breakers in a 1-pole configuration.

Installation Notes

Installation must be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the panel and verify absence of voltage with a calibrated meter before handling or replacing any circuit breaker. Confirm that bus bar slot dimensions and interrupting rating requirements of the enclosure are compatible with this breaker prior to installation. Do not exceed the marked voltage or ampere ratings under any operating condition.