Square D

Square D EJB34050SA Molded Case Circuit Breaker – 3 Pole – 50A – Bolt-On – Thermal Magnetic – Factory-Installed Shunt Trip

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SKU: EJB34050SA GTIN/UPC: 785901648659
$1,369.09
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The Square D EJB34050SA is a high-interrupting capacity E-Frame molded case circuit breaker engineered for commercial and industrial power distribution systems requiring remote tripping functionality. Manufactured by Schneider Electric, this 3-pole, 50A breaker combines dependable thermal-magnetic protection with a factory-installed shunt trip for enhanced safety, automation, and emergency shutdown applications.

Designed for installation in Square D NF panelboards, the EJB34050SA utilizes a secure bolt-on mounting configuration and includes load-side lugs for simplified installation. The integrated shunt trip enables remote breaker operation from external control circuits, making it ideal for emergency power-off systems, fire alarm interfaces, safety interlocks, and building automation systems.

With interrupting ratings of 100kA at 120VAC and 240VAC, and 65kA at 480Y/277VAC, this breaker delivers exceptional fault-clearing capability in demanding electrical environments. A Visi-Trip visual indicator provides immediate identification of tripped circuits, reducing troubleshooting time and improving maintenance efficiency.

Specifications

  • Brand: Square D
  • Manufacturer: Schneider Electric
  • Part Number: EJB34050SA
  • Series: EJB Series
  • Type: Molded Case Circuit Breaker
  • Frame Type: E-Frame
  • Configuration: 3 Pole
  • Phase: 3 Phase
  • Current Rating: 50A
  • Voltage Rating: 120VAC, 240VAC, 480Y/277VAC
  • Mounting Style: Bolt-On
  • Terminal Type: Lugs
  • Protection Type: Thermal Magnetic
  • Trip Function: LI – Long-Time and Instantaneous
  • Trip Adjustability: Fixed
  • Application: Square D NF Panelboards

Interrupting Ratings

  • 100kA @ 120VAC
  • 100kA @ 240VAC
  • 65kA @ 480Y/277VAC

Electrical & Mechanical Features

  • Factory-installed shunt trip for remote circuit operation
  • Thermal-magnetic overload and short-circuit protection
  • Long-time and instantaneous trip functions
  • Fixed trip characteristics
  • Bolt-on mounting configuration
  • Load-side lugs included
  • Visi-Trip visual trip indicator
  • Suitable for emergency shutdown and automated control systems
  • HACR rated for HVAC applications
  • HID rated for lighting applications
  • High interrupting capacity for demanding fault conditions

Wire Range

  • Copper Conductors: AWG 14–2/0
  • Aluminum Conductors: AWG 12–2/0
  • Maximum Wire Size: 2/0 AWG
  • Minimum Wire Size: AWG 14 Copper / AWG 12 Aluminum

Available Options

  • Auxiliary Switch
  • Alarm Switch
  • Padlock Attachment

Included Accessories

  • Factory-Installed Shunt Trip
  • Load-Side Lugs

Standards & Approvals

  • UL 489 Listed
  • CSA C22.2 No. 5
  • NEMA AB 1 Compliant
  • NFPA 70 Compliant
  • CSA Approved
  • cULus Listed
  • HACR Rated
  • HID Rated
  • NOM Approved
  • UL Listed
  • Authentic Square D / Schneider Electric product
  • Manufactured to EJB Series specifications for NF panelboard applications

Operating Conditions

  • Ambient Temperature Rating: 40°C
  • Designed for commercial and industrial power distribution systems
  • Ideal for emergency shutdown, safety interlock, and remote-control applications
  • Type Thermal Magnetic
  • Vendor Square D
  • Brand Square D

Returns are easy

You may return items within 30 days of delivery for a refund.

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.