Square D FH361001700 Molded Case Circuit Breaker

This breaker is engineered specifically for Square D I-Line panelboards and switchboards. It uses a specialized plug-on line connection that engages directly with the I-Line bus stack, making it incompatible with standard NQ or NF panels.

The 1700 suffix indicates a specialized 1700A high magnetic trip setting. This elevated instantaneous trip threshold is designed to prevent nuisance tripping when starting motors, transformers, or other loads with significant inrush currents.

For new installations or panel upgrades, this legacy F-Frame unit crosses over to the modern Square D PowerPacT H-Frame series. The HGA36100 is the direct I-Line equivalent, offering compatible plug-on mounting for the same panelboards.

Unlike standard bolt-on breakers, this unit utilizes Square D I-Line plug-on mounting. The breaker jaws press directly onto the panel vertical busbars, which simplifies installation and allows for rapid phase arrangement without modifying hard bus connections.

The fixed thermal-magnetic (LI) trip unit provides two layers of protection. The thermal element responds to sustained overloads using a bimetallic strip, while the magnetic element reacts immediately to short circuits, utilizing the specialized 1700A threshold for instantaneous tripping.

Yes, this molded case circuit breaker is rated for use in 250VDC systems, making it suitable for industrial DC control circuits, battery backups, or specific solar applications, providing up to 10kA of interrupting capacity.

Yes, the factory-installed load lugs are dual-rated. They accommodate copper conductors from 14 AWG to 1/0 AWG, and aluminum conductors from 12 AWG to 1/0 AWG, offering flexibility depending on your site wiring standards.

A high magnetic trip setting, like the 1700A threshold on this model, is crucial for circuits feeding inductive loads. It allows the breaker to hold through the brief, massive current spikes during equipment startup without compromising short-circuit safety.