Square D EHB24040 Two Pole Circuit Breaker 480Y 277V

The Square D EHB24040 is a two-pole molded‑case circuit breaker from Schneider Electric’s Square D EHB family designed for 480Y/277V AC distribution. This bolt‑on, thermal‑magnetic device is rated at 40 amperes and provides 14 kA of interrupting capacity at 480Y/277 VAC, making it suitable for protecting branch circuits in commercial lighting, HVAC, and other equipment fed from 480Y/277V systems. It accepts #14-2 AWG aluminum or copper conductors, enabling straightforward wiring in standard Square D E‑frame panelboards and enclosures. The unit is specified for ambient temperatures up to 40°C, supporting reliable operation in typical commercial and light industrial environments. By delivering deterministic overcurrent protection with a dual‑trip mechanism, the EHB24040 helps ensure electrical safety and system reliability where 480Y/277V distribution is used, aligning with Square D’s long‑standing emphasis on dependable, easily serviceable protection devices.