Square D EHB34040 40A 3-Pole 480V Molded Case Circuit Breaker
Square D · Circuit Breakers & Protection
Description The Square D EHB34040 is a 40 Amp, 3-pole molded case circuit breaker designed for three-phase electrical systems. It provides thermal-magnetic protection for circuits operating at 240 VAC or 480Y/277 VAC. This bolt-on breaker is compatible with Square D NEHB panelboards, ensuring secure and reliable operation. Technical Specifications Condition New/Never Used Surplus Brand Square D Category Circuit Breaker Part Number EHB34040 Subcategory Molded Case Circuit Breaker Series EHB Poles 3 Current Rating 40 Amp Voltage Rating 240 VAC, 480Y/277 VAC Phase Three-Phase Trip Type Thermal-Magnetic Trip Function Long-Time, Instantaneous Trip Adjustability Fixed Thermal, Fixed Magnetic Mounting Type Bolt-On Terminal Type Lugs Wire Range 14–2 AWG (Cu), 12–2 AWG (Al), Max 2 AWG Interrupting Rating 65kA @ 240VAC, 14kA @ 480Y/277VAC Optional Features Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment Standards CSA C22.2 No. 5, UL 489 Approvals CSA, UL Operating Temperature 40°C Construction Features HACR Rated, Visual Trip Indicator Weight 5 lbs Information About EHB34040 The EHB34040 is part of Square D’s EHB series of molded case breakers, engineered for industrial and commercial applications. It features a thermal-magnetic trip mechanism with long-time and instantaneous (LI) functionality. The breaker supports wire sizes from 14–2 AWG (Cu) and 12–2 AWG (Al) with a maximum capacity of 2 AWG. Optional features include shunt trip, auxiliary switch, undervoltage release, alarm switch, and padlock attachment for enhanced safety and operational flexibility. Key Features: Series: EHB Series molded case breaker for industrial use. Poles: 3-pole configuration for three-phase systems. Current Rating: 40 Amp continuous load capacity. Voltage Rating: 240 VAC and 480Y/277 VAC compatible. Mounting Style: Bolt-on for secure panelboard installation. Trip Mechanism: Thermal-magnetic with long-time and instantaneous (LI) protection. Interrupting Capacity: 65kA @ 240VAC, 14kA @ 480Y/277VAC. Wire Range: 14–2 AWG (Cu), 12–2 AWG (Al), Max 2 AWG. Optional Features: Shunt trip, auxiliary switch, undervoltage release, alarm switch, padlock attachment. Construction Features: HACR rated with visual trip indicator. The EHB34040 delivers the reliability and precision required for industrial and commercial three-phase circuit protection.
Brand: Square D · Category: Circuit Breakers & Protection
Key features
- Series: EHB Series molded case breaker for industrial use.
- Poles: 3-pole configuration for three-phase systems.
- Current Rating: 40 Amp continuous load capacity.
- Voltage Rating: 240 VAC and 480Y/277 VAC compatible.
- Mounting Style: Bolt-on for secure panelboard installation.
- Trip Mechanism: Thermal-magnetic with long-time and instantaneous (LI) protection.
- Interrupting Capacity: 65kA @ 240VAC, 14kA @ 480Y/277VAC.
- Wire Range: 14–2 AWG (Cu), 12–2 AWG (Al), Max 2 AWG.
- Optional Features: Shunt trip, auxiliary switch, undervoltage release, alarm switch, padlock attachment.
- Construction Features: HACR rated with visual trip indicator.
Specifications
| Manufacturer part number | EHB34040 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Square D |
| Category | Circuit Breaker |
| Part Number | EHB34040 |
| Subcategory | Molded Case Circuit Breaker |
| Series | EHB |
| Poles | 3 |
| Current Rating | 40 Amp |
| Voltage Rating | 240 VAC, 480Y/277 VAC |
| Phase | Three-Phase |
| Trip Type | Thermal-Magnetic |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Mounting Type | Bolt-On |
| Terminal Type | Lugs |
| Wire Range | 14–2 AWG (Cu), 12–2 AWG (Al), Max 2 AWG |
| Interrupting Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC |
| Optional Features | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approvals | CSA, UL |
| Operating Temperature | 40°C |
| Construction Features | HACR Rated, Visual Trip Indicator |
| Weight | 5 lbs |
| Product type | Molded Case Circuit Breaker |
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