Square D FDA32100 Molded Case Circuit Breaker

This breaker features an I-Line style plug-in connection, making it compatible exclusively with Square D I-Line power distribution panelboards and switchboards.

The I-Line connection uses a plug-on jaw mechanism that engages directly with the panelboard bus stack. A retaining screw on the mounting bracket secures the breaker to the pan, ensuring a reliable phase connection without the need for individual cable terminations on the line side.

The 25kAIC interrupting rating means this breaker can safely clear fault currents up to 25,000 amps at 240V AC. This makes it suitable for commercial distribution systems where available fault currents do not exceed this threshold.

Yes, the FDA32100 is part of the legacy Square D F-frame lineup. While the original F-frame series has been discontinued by the manufacturer, this unit serves as an exact drop-in replacement for existing F-frame slots in older I-Line panels.

For facility upgrades requiring a modern equivalent, the FDA32100 is officially replaced by the newer QDA32100 series, which offers similar specifications for 240V I-Line applications.

The standard load side lugs accept copper wire from 14 AWG to 1/0 AWG, and aluminum wire from 12 AWG to 1/0 AWG.

It features a fixed thermal magnetic trip unit with long-time and instantaneous (LI) functions. The thermal element protects against sustained overloads, while the magnetic element provides immediate tripping during short circuit events.

Yes, when installing or reinstalling an I-Line circuit breaker, it is recommended to apply the appropriate electrical joint compound (such as PJC7201) to the plug-on jaws to maintain a secure and highly conductive connection with the busbar stack.