ABB / General Electric SKHC3612L3XX Molded Case Circuit Breaker

Following ABB's acquisition of GE Industrial Solutions, Spectra RMS breakers may feature either GE or ABB branding depending on the production date. The form, fit, and function of the SKHC3612L3XX remain identical regardless of the label.

ABB is transitioning the legacy GE Spectra RMS series to the Tmax XT line. For the 1200A SK frame, the ABB Tmax XT7 series is the designated replacement for new installations and panel upgrades.

Yes, Spectra RMS SK1200 frame breakers require a rating plug, such as the SRPK1200A1200, to establish the specific trip rating. The rating plug is installed directly into the front of the microEntelliGuard trip unit.

Yes, this breaker is suitable for reverse fed applications. The solid state microEntelliGuard trip unit and SK frame design allow for bottom feeding without compromising the protection capabilities or interrupting ratings.

This unit mount breaker is designed to bolt into GE Spectra Series switchboards, motor control centers, and GE A-Series panelboards. It is also compatible with NEMA 1 surface mount enclosures like the ABB TK4V1200S.

The LSI trip unit allows precise coordination by offering adjustable long time pickup and delay bands, adjustable short time pickup with multiple delay bands, and an adjustable instantaneous pickup. Adjustments are made via the front LCD display and tactile keypad.

Lugs are typically sold separately for SK frame breakers. Compatible lug kits for the 1200A frame include the TCAL121, which accepts four 250 to 350 kcmil cables per phase. Always verify the specific lug kit matches your wire size and material.