Square D EJB34030SA 30 Amp 3-Pole Circuit Breaker with Shunt Trip, 480Y/277V, E-Frame

Square D EJB34030SA 30 Amp 3-Pole Circuit Breaker with Shunt Trip, 480Y/277V, E-Frame

Somebody handed you a part number ending in SA and you want to know what those letters change. They mark a shunt trip version, so an outside signal such as a fire alarm or an emergency stop can open the breaker with nobody standing at the panel. The rest of the number describes a Square D E-Frame breaker rated 30 amps across three poles at up to 480Y/277 volts AC.

Day to day it protects the circuit the ordinary way, through a thermal-magnetic trip unit that reacts to overloads and short circuits, with a small indicator showing when it has operated. It bolts into a Square D NF panelboard and takes four pole spaces rather than three, because the shunt trip module needs one of its own. Control wiring for that module runs on 120 volts AC, from 110 to 130 volts.

Common Applications

• Protecting a 30 amp three-phase circuit in a Square D NF lighting panel
• Setups where a control system must shut a circuit down automatically
• Lighting loads that call for an HID rated breaker
• Air conditioning, heating, and refrigeration loads needing an HACR rating

Key Features

• Shunt trip included: A 120 volt AC coil opens the breaker on command from a remote control circuit.
• Standard overload protection: The thermal-magnetic trip unit is rated 875 A and holds 270 A.
• Visible trip signal: An indicator points out the device that operated.
• Wide interrupting range: Up to 100 kA at 120/240 volts AC, 65 kA at 480Y/277 volts AC.

Specifications

• Brand: Square D (Schneider Electric)
• Catalog Number: EJB34030SA
• Product Type: Type EJB E-Frame miniature circuit breaker
• Line Rated Current: 30 A
• Number of Poles: 3
• Maximum Operating Voltage: 480Y/277 V AC
• Breaking Capacity: 65 kA at 277 V AC and 480Y/277 V AC, 100 kA at 240 V AC, 120 V AC, and 120/240 V AC
• Breaking Capacity Code: J
• Trip Unit: Thermal-magnetic, 875 A rating, 270 A holding current
• Device Composition: Shunt trip
• Mounting Mode: Bolt-on, 4 pole spaces required
• Product Destination: NF panelboard
• Electrical Connection: Aluminum lugs, AWG 12 to 6 aluminum, AWG 14 to 6 copper
• Tightening Torque: 30.09 lbf-in (3.4 N.m)
• Ambient Calibration: 40 deg C (104 deg F)
• Certifications: cULus, HID rated, HACR rated

Product Identification

• Country of Origin: United States
• Product Size and Weight: 5.66 in H x 3.92 in W x 4.05 in D, 4 lb
• Package Size and Weight: 9.9 in L x 6.2 in W x 6.3 in H, 4.34 lb
• GTIN/UPC: 785901594598

FAQ

What does a shunt trip do? It gives an outside control circuit a way to open the breaker, common where alarms or safety systems must cut power quickly.

How is the SA version different? It leaves the factory with the shunt trip already built in and needs one extra pole space for it.

How big is it and what does it weigh? It measures 5.66 in high by 3.92 in wide by 4.05 in deep and weighs 4 lb.

What size wire can I land on it? Aluminum lugs take AWG 12 through 6 aluminum or AWG 14 through 6 copper.

Where is it made? Square D lists the country of origin as the United States.