Part of the SENTRON family, this 200A molded case circuit breaker provides reliable long-time and instantaneous trip functions for commercial and industrial electrical systems. Designed for bolt-on installation, it mounts into Siemens P1, P2, and P3 panelboards, as well as compatible switchboards and meter centers. Note that this legacy QJ2H frame unit is officially replaced by the HQR23B200. Rated for 42kAIC at 240VAC, it features non-interchangeable trips and HACR certification.
HACR Rated, Reverse Feed, Non-Interchangeable Trip, High Interrupting Capacity
Product FAQs
7 answers
Which Siemens panelboards are compatible with this circuit breaker?
This bolt-on breaker is designed for installation in Siemens P1, P2, and P3 panelboards. It is also compatible with select Siemens switchboards and meter centers.
Is there a modern replacement for the legacy QJ frame breakers?
Yes, Siemens has transitioned from the legacy QJ frame to the newer QR frame. The HQR23B200 is the modern equivalent and shares the same form factor for easy retrofitting, though a specific mounting kit may be required depending on your panelboard.
Is this circuit breaker suitable for reverse feed applications?
Yes, Siemens QJ frame circuit breakers feature non-interchangeable trip units and are UL Listed for reverse feed applications.
Can I swap or upgrade the trip unit on this breaker?
No, QJ frame breakers feature fixed, non-interchangeable thermal-magnetic trip units. They are shipped fully assembled and the trip unit cannot be removed or modified in the field.
What type of wire is supported by the standard lugs?
The factory-installed TA1Q300 lugs are rated for 75 degrees Celsius and accept both copper and aluminum conductors ranging from 6 AWG to 300 kcmil.
Is this breaker rated for HVAC applications?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment motor loads.
Can I field-install internal accessories like a shunt trip?
No, internal accessories such as shunt trips or auxiliary switches for the QJ frame must be factory-installed. They cannot be added in the field.
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