Ls Electric 628033163 Mcb 63A 3-pole 480Y/277VAC 6ka

Product Description

The LS ELECTRIC 628033163 is a 3-pole miniature circuit breaker (MCB) rated for 63 amps at 480Y/277VAC with a 6 kA interrupt capacity. It operates on a thermal magnetic trip mechanism with a C-curve trip characteristic, making it suitable for general load protection where moderate inrush currents are present. Classified under UL1077 as a supplementary protector, this unit belongs to the LS ELECTRIC BK Series. Licensed electricians install this breaker in panelboards, control panels, and equipment distribution boards where branch-circuit or supplementary protection is required.

This breaker is designed for use in commercial and light industrial electrical distribution systems operating at 480Y/277VAC. The 3-pole configuration handles three-phase loads, and the C-curve trip characteristic suits motor and transformer loads with moderate startup inrush. The BK Series platform is commonly specified in control panel builds and equipment enclosures where compact, reliable supplementary protection is needed. The alternate part number BK63H 3P C63A 6kA 480Y/277VAC UL1077 may be used when cross-referencing this unit.

Key Features

• 63A continuous current rating for three-phase load protection
• 480Y/277VAC voltage rating covers standard commercial distribution voltages
• 6 kA short-circuit interrupt capacity per UL1077
• C-curve thermal magnetic trip suits loads with moderate inrush, such as motors and transformers
• 3-pole design handles three-phase circuits in a single device
• UL1077 listed as a supplementary protector for equipment and control panel applications

Compatibility

Designed as a UL1077-listed supplementary protector within the LS ELECTRIC BK Series, suitable for three-phase control panels and equipment enclosures operating at 480Y/277VAC. Alternate part number: BK63H 3P C63A 6kA 480Y/277VAC UL1077.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the panel and verify zero voltage with a meter before handling or wiring this device. Note that UL1077 supplementary protectors are intended for use within equipment enclosures and are not a direct replacement for UL489 branch-circuit breakers. Confirm that the panel bus and conductor ampacity match the 63A rating before energizing.