Description
The Schneider Electric EJB34125 is a three pole molded case circuit breaker designed for reliable branch circuit protection in commercial and industrial power distribution systems. It provides thermal magnetic protection with long-time and instantaneous trip functions for controlled operation in 480Y/277VAC applications.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Schneider Electric / Square D |
| Category |
Circuit Protection |
| Part Number |
EJB34125 |
| Subcategory |
Molded Case Circuit Breakers |
| Series |
EJB |
| Frame Type |
EJB |
| Amperage Rating |
125 A |
| Voltage Rating |
480Y / 277 VAC |
| Number of Poles |
3 |
| Phase |
3 Phase |
| Interrupting Rating |
65 kAIC @ 480Y/277 VAC |
| Protection Type |
Thermal Magnetic |
| Trip Functions |
Long-Time and Instantaneous (LI) |
| Mounting Type |
Bolt-On |
| Connection Type |
Bolt-On |
| Terminal Connection |
Aluminum Lugs |
| Wire Size Compatibility |
AWG 12–2/0 Aluminum, AWG 14–2/0 Copper |
| For Use With |
NF Panelboard |
| Standards / Approvals |
cULus, HACR |
| Temperature Rating |
40 °C |
| Dimensions (H x W x D) |
5.66 x 2.94 x 4.05 in |
| Weight |
4 lbs |
Information About EJB34125
The EJB34125 is part of the Schneider Electric Square D EJB Series, developed for compact molded case circuit breaker applications in panelboard systems. This breaker supports three-phase electrical distribution with a continuous current rating of 125 amps at 480Y/277VAC. It uses a thermal magnetic trip mechanism to provide coordinated overload and short-circuit protection through long-time and instantaneous response. The bolt-on mounting design allows secure installation in NF panelboards while maintaining consistent electrical performance.
Key Features
- Thermal Magnetic Protection: Combines thermal overload sensing with instantaneous magnetic tripping to protect circuits from sustained overcurrent and short-circuit faults.
- High Interrupting Capacity: Rated at 65 kAIC at 480Y/277 VAC, enabling safe interruption of high fault currents in demanding distribution systems.
- Three Pole Configuration: Provides balanced protection across all phases for stable three-phase power distribution.
- Bolt-On Mounting Design: Ensures secure mechanical and electrical connection within compatible panelboards.
- EJB Compact Frame: Optimized for space-efficient installations while maintaining robust electrical performance.
- Wide Conductor Compatibility: Accepts a broad range of aluminum and copper wire sizes to support flexible field wiring.
- Certified for Industrial Use: cULus listed and HACR rated for compliance with recognized electrical and safety standards.
The EJB34125 delivers the reliability and precision required for protecting three-phase branch circuits in commercial and industrial power distribution systems.
