The Square D LJA36250U33X is a 3 Pole solid state molded case circuit breaker with a current rating of 250 Amps and a voltage rating of 600VAC. It has an interrupting rating of 65kAIC at 480VAC. The LJA36250U33X has an I-Line style plug-in connection type and includes long time, short time and instantaneous trip functions.
Which panelboards are compatible with the LJA36250U33X?
This breaker is designed exclusively for use in Square D I-Line panelboards and I-Line switchboards. It cannot be used in standard unit-mount or drawout enclosures.
How are the line and load connections configured on the LJA36250U33X?
The line side utilizes an I-Line plug-in connection for direct bus mounting in compatible panelboards. The load side features mechanical lugs that accept one 2 AWG to 500 kcmil aluminum wire or one 2 AWG to 600 kcmil copper wire.
What does the U33X suffix indicate on this circuit breaker?
The U33X suffix specifies that the breaker is equipped with a MicroLogic 3.3S electronic trip unit. This provides adjustable Long-Time, Short-Time, and Instantaneous (LSI) trip functions for precise system coordination.
Is the LJA36250U33X rated for 80 percent or 100 percent continuous current?
This PowerPacT L-frame circuit breaker carries a standard continuous current rating of 80 percent.
What does the LJA prefix designate in the Square D catalog number?
The "L" designates the PowerPacT L-frame family, the "J" indicates the interrupting rating tier of 65kAIC at 480VAC, and the "A" specifies the I-Line plug-in mounting style.
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