ABB / General Electric SFPA36AT0250 Molded Case Circuit Breaker

Yes, all Spectra RMS circuit breakers require a front-mounted rating plug to establish the continuous ampere rating. The breaker will not provide proper protection without a compatible rating plug installed.

The SFPA36AT0250 accepts GE SRPF250A series interchangeable rating plugs. You must select the specific plug that matches your load requirements up to the 250A maximum limit of the breaker frame.

The digital solid-state LSI trip unit allows you to adjust the Short-Time and Instantaneous trip points for precise system coordination. The Long-Time pickup is fixed based on the specific rating plug inserted into the breaker.

The standard mechanical lug kit is the TCAL29. This set accommodates aluminum or copper conductors ranging from 8 AWG through 350 kcmil.

ABB acquired GE Industrial Solutions and has phased out the Spectra RMS line. This specific breaker is typically sourced as a direct replacement for existing switchboards and panelboards that already utilize the SF frame.

The solid-state trip unit digitally samples the current to determine the true RMS value of both sinusoidal and non-sinusoidal waveforms. This provides accurate overload protection and prevents nuisance tripping in environments with high harmonic distortion.