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EH34040 | Square D EH Series 40A 3-Pole 480Y/277V Plug-In Circuit Breaker
- Regular price
- $855.00
- Sale price
- $855.00
- Regular price
-
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Product Description P/N: EH34040
Description
The Square D EH34040 is a three-pole molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection in commercial electrical distribution systems. Rated at 40 amps and 480Y/277 VAC, this breaker uses thermal-magnetic trip technology to deliver long-time and instantaneous protection. It is engineered for plug-in installation in compatible Square D NEH panelboards.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Square D |
| Category | Circuit Protection |
| Part Number | EH34040 |
| Subcategory | Circuit Breakers |
| Series | EH |
| Product Type | Molded Case Circuit Breaker |
| Frame Type | EH |
| Rated Current | 40 A |
| Number of Poles | 3 |
| Phase | Three Phase |
| Voltage Rating | 480Y/277 VAC |
| Protection Type | Thermal-Magnetic |
| Interrupting Rating | 14 kAIC @ 277 V |
| Connection Type | Plug-In |
| Wire Size | AWG 14–2 Aluminum/Copper |
| Functions | Long-Time and Instantaneous (LI) |
| Ambient Temperature Rating | 40 °C |
| Application | Power Distribution |
| Weight | 3.0 lb (approx.) |
Information About EH34040
The EH34040 is part of Square D’s EH series of molded case circuit breakers, developed for compact branch circuit protection in low-voltage panelboard applications. This breaker incorporates a thermal-magnetic trip unit that protects circuits from overloads and short-circuit faults while maintaining stable operation. It is designed for three-phase electrical systems and supports both copper and aluminum conductors within a defined wire range. Built to meet UL and CSA requirements, the breaker is intended for dependable operation in controlled commercial and light industrial environments.
Key Features:
- 40 Amp Current Rating: Provides accurate protection for three-phase branch circuits.
- Three-Pole Configuration: Ensures balanced protection across all phases.
- 480Y/277 VAC Rating: Suitable for common commercial power distribution systems.
- Thermal-Magnetic Protection: Combines long-time overload and instantaneous trip functions.
- Plug-In Mounting Design: Enables secure installation in compatible NEH panelboards.
- 14 kA Interrupting Rating: Rated for fault protection at 277 VAC.
- Copper and Aluminum Compatibility: Accepts conductors from AWG 14 to AWG 2.
The EH34040 delivers the reliability and precision required for commercial three-phase power distribution protection.
Description
The Square D EH34040 is a three-pole molded case circuit breaker designed to provide reliable overcurrent and short-circuit protection in commercial electrical distribution systems. Rated at 40 amps and 480Y/277 VAC, this breaker uses thermal-magnetic trip technology to deliver long-time and instantaneous protection. It is engineered for plug-in installation in compatible Square D NEH panelboards.
Technical Specifications
| Condition | New/Never Used Surplus |
| Brand | Square D |
| Category | Circuit Protection |
| Part Number | EH34040 |
| Subcategory | Circuit Breakers |
| Series | EH |
| Product Type | Molded Case Circuit Breaker |
| Frame Type | EH |
| Rated Current | 40 A |
| Number of Poles | 3 |
| Phase | Three Phase |
| Voltage Rating | 480Y/277 VAC |
| Protection Type | Thermal-Magnetic |
| Interrupting Rating | 14 kAIC @ 277 V |
| Connection Type | Plug-In |
| Wire Size | AWG 14–2 Aluminum/Copper |
| Functions | Long-Time and Instantaneous (LI) |
| Ambient Temperature Rating | 40 °C |
| Application | Power Distribution |
| Weight | 3.0 lb (approx.) |
Information About EH34040
The EH34040 is part of Square D’s EH series of molded case circuit breakers, developed for compact branch circuit protection in low-voltage panelboard applications. This breaker incorporates a thermal-magnetic trip unit that protects circuits from overloads and short-circuit faults while maintaining stable operation. It is designed for three-phase electrical systems and supports both copper and aluminum conductors within a defined wire range. Built to meet UL and CSA requirements, the breaker is intended for dependable operation in controlled commercial and light industrial environments.
Key Features:
- 40 Amp Current Rating: Provides accurate protection for three-phase branch circuits.
- Three-Pole Configuration: Ensures balanced protection across all phases.
- 480Y/277 VAC Rating: Suitable for common commercial power distribution systems.
- Thermal-Magnetic Protection: Combines long-time overload and instantaneous trip functions.
- Plug-In Mounting Design: Enables secure installation in compatible NEH panelboards.
- 14 kA Interrupting Rating: Rated for fault protection at 277 VAC.
- Copper and Aluminum Compatibility: Accepts conductors from AWG 14 to AWG 2.
The EH34040 delivers the reliability and precision required for commercial three-phase power distribution protection.