Siemens 3VA5450-5EC31-0AA0 Molded Case Circuit Breaker

No. The -0AA0 catalog suffix indicates this circuit breaker ships with bare terminals (without lugs). Line and load lugs must be ordered separately based on your specific wire size and conductor material.

The Siemens 3VA54 600-ampere frame measures 9.8 inches in height, 5.4 inches in width, and 5.4 inches in depth.

This model is equipped with a Siemens TM230 thermal-magnetic trip unit. It provides fixed long-time continuous current protection (Ir) and features an adjustable dial to set the instantaneous short-circuit pickup (Ii).

Yes, the 3VA54 frame serves as the modern upgrade path for legacy Siemens and ITE 500A components, such as the LD63B500. Proper mounting hardware or adapter kits may be required when retrofitting this breaker into older panelboards.

Yes. Siemens 3VA5 thermal-magnetic circuit breakers are UL listed for reverse feeding, allowing power to be safely supplied to the load side terminals without derating the performance of the breaker.

When applying this three-pole breaker to a 500V ungrounded direct current system, the power supply must be connected in a zig-zag series configuration through all three poles. This ensures the voltage is uniformly distributed across the breaker terminals.

Yes. The 3VA breaker utilizes an over-center toggle mechanism that is completely trip-free. If an overcurrent or short-circuit condition occurs, the internal contacts will forcefully separate to clear the fault even if the operating handle is physically locked or held in the ON position.