Hubbell HBL400FBK Single Pole Circuit Breaker

The Hubbell HBL400FBK is a single-pole circuit breaker rated for 400 A and 600 V. This Hubbell device interrupts current on a single conductor in a compatible distribution panel to provide overcurrent protection for an individual circuit. The 400 A rating and 600 V maximum operating voltage establish its use for high-capacity feeders or branch circuits within electrical installations that require robust protection. The HBL400FBK designation helps with accurate specification, cross-referencing, and replacement planning in electrical panels and switchgear. This breaker is suitable for use in electrical installations requiring a single-pole protection solution for high-current circuits. When selecting this breaker, verify compatibility with your panel’s bus configuration, the system voltage, and applicable electrical codes to ensure proper integration and safe operation.