ABB / General Electric TJJ436150 Molded Case Circuit Breaker

The TJJ436150 is compatible with GE A-Series panelboards, Spectra Series switchboards, J-Frame enclosures, and GE motor control centers. It requires the appropriate bolt-on mounting hardware specific to the panel or enclosure type.

Yes, installing this J-Frame breaker into a GE A-Series panelboard requires a dedicated mounting kit or strap kit designed for J-Frame breakers. The exact kit depends on the panelboard interior and whether it is a single or twin mount configuration.

The standard lugs accept either one conductor from 6 AWG to 600 kcmil (copper or aluminum) or two conductors from 2/0 AWG to 250 kcmil (copper or aluminum). Always torque terminals to the manufacturer specifications found on the breaker faceplate.

The TJJ436150 features a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The instantaneous trip setting can be adjusted via a dial on the front of the breaker to coordinate with downstream devices or specific load inrush requirements.

The LI designation stands for Long-Time and Instantaneous trip functions. Long-Time provides delayed tripping for sustained overloads, while Instantaneous provides immediate tripping for severe short circuits. This is standard for general power distribution applications.

Yes, the TJJ436150 is rated for DC applications up to 500VDC. It provides an interrupting capacity of 20kA at both 250VDC and 500VDC. Ensure proper wiring configurations for DC systems as specified by the manufacturer.

The 30kAIC rating indicates the maximum fault current the breaker can safely interrupt at 480VAC without sustaining damage. You must verify that the available fault current at the installation point does not exceed this value to ensure safe operation and code compliance.

While the TJJ436150 can be installed in GE Motor Control Centers, it is a standard thermal-magnetic circuit breaker, not a dedicated Motor Circuit Protector (MCP). For dedicated motor protection, an MCP with only magnetic trip functions is typically used in conjunction with a separate overload relay.

Yes, the GE J-Frame series is a legacy molded case circuit breaker line. While ABB acquired GE Industrial Solutions and continues to support many lines, exact replacements or retrofits may require specific hardware when upgrading to newer ABB Tmax XT series breakers.

Most GE molded case circuit breakers can be mounted vertically or horizontally without affecting their tripping characteristics. However, you must ensure the installation complies with NEC 240.81, which requires that when the breaker is operated vertically, the up position of the handle shall be the ON position.