ABB / General Electric TJJ436225 Molded Case Circuit Breaker

The factory lugs on the TJJ436225 accept either a single conductor ranging from 6 AWG to 600 kcmil or dual conductors ranging from 2/0 AWG to 250 kcmil. This dual-wire capability is especially useful for parallel feeds. Both copper and aluminum wires are supported.

This legacy J-Frame breaker is designed to fit GE A-Series panelboards, GE Spectra Series switchboards, GE motor control centers, and dedicated GE J-Frame enclosures.

Yes. While the TJJ436225 is a bolt-on breaker, installing it into GE A-Series panelboards or Spectra switchboards requires a specific J-Frame mounting hardware kit, often referred to as a strap or connector kit, to safely connect it to the panelboard bus.

Yes, this breaker is fully rated for DC applications. It provides an interrupting rating of 20 kAIC at both 250VDC and 500VDC, making it suitable for industrial DC control circuits, solar setups, or battery backup systems.

The TJJ436225 features a thermal-magnetic trip unit where the thermal overload protection is fixed, but the magnetic short-circuit protection is adjustable. This allows electricians to fine-tune the instantaneous trip threshold to prevent nuisance tripping from motor inrush currents while maintaining strict fault protection.

ABB acquired GE Industrial Solutions, meaning legacy GE product lines are now manufactured under the ABB umbrella. The TJJ436225 may arrive with either ABB or General Electric branding, but the physical dimensions, mounting, and performance remain identical.

Yes, it serves as a direct drop-in replacement for older 225A GE TJJ breakers. It shares the same physical footprint and bolt-on configuration, allowing you to reuse existing J-Frame mounting hardware and enclosures.

No, the TJJ436225 is equipped with a standard thermal-magnetic trip unit featuring Long-Time and Instantaneous (LI) functions only. It does not include built-in ground fault (LSIG) or short-time (LSI) protection.