Square D EJB34025 Miniature Circuit Breaker

The EJB34025 is an E-frame miniature circuit breaker designed specifically for use in Square D NF series panelboards.

Yes. The EJB34025 shares the exact same physical E-frame dimensions and bolt-on configuration as the EDB34025 and EGB34025 models. The EJB provides a higher interrupting rating of 65 kAIC at 480Y/277VAC and can safely replace these lower-rated models when higher fault capacity is required.

The "J" identifies the highest interrupting capacity tier within the Square D E-frame family. For this breaker, it denotes an interrupting rating of 65 kAIC at 480Y/277VAC and 100 kAIC at 120VAC or 240VAC.

This model features a bolt-on connection. It secures directly to the bus of an NF panelboard using mounting screws, providing a robust and reliable contact for commercial and industrial applications.

The integrated terminal lugs accommodate #14 to #6 AWG copper wire or #12 to #6 AWG aluminum wire.

Yes, the standard factory lugs are AL/CU rated and support both copper and aluminum conductors within their accepted gauge ranges.

No, this breaker utilizes fixed thermal and fixed magnetic trip mechanisms. The long-time and instantaneous trip thresholds cannot be modified in the field.

Standard molded case circuit breakers like the EJB34025 are designed to handle continuous loads up to 80 percent of their nominal 25A rating, in accordance with standard NEC sizing guidelines.

While designed for 3-phase circuits, it can supply single-phase loads if wired accordingly. However, it will always occupy three pole spaces in the NF panelboard chassis regardless of how many poles are actively carrying current.