ABB / General Electric TJJ436200 Molded Case Circuit Breaker

This J-frame breaker is designed for use in GE A-Series panelboards, Spectra series switchboards, and GE motor control centers. It requires the appropriate bolt-on mounting hardware for these specific enclosures.

The standard lugs accept either a single wire ranging from 6 AWG to 600 kcmil or dual wires ranging from 2/0 AWG to 250 kcmil. Both copper and aluminum conductors are supported.

While the thermal overload protection is fixed at 200 amps, the magnetic instantaneous trip is adjustable. This allows electricians to fine-tune the short-circuit response to coordinate with downstream devices or specific motor starting currents.

ABB acquired GE Industrial Solutions in 2018. You may see this J-frame breaker branded as either General Electric or ABB, but the physical dimensions, mounting, and performance specifications remain identical.

Yes, the TJJ436200 is rated for DC systems up to 500VDC, providing a 20kA interrupting capacity at both 250VDC and 500VDC. Ensure proper wiring configurations for DC circuits as specified by the manufacturer guidelines.

Always use a calibrated torque wrench and follow the torque specifications printed directly on the breaker label or lug. Improper torque can lead to overheating and premature failure of the termination.

No, this is a bolt-on molded case circuit breaker designed for direct mounting to the busbars in compatible GE panelboards and switchboards. It is not compatible with DIN rail mounting systems.

The LI designation means the breaker provides Long-Time (L) and Instantaneous (I) protection. The Long-Time function protects against sustained overloads, while the Instantaneous function protects against sudden short circuits.