67429

Overview

The Siemens 67429 is a molded case circuit breaker sub-assembly designed for industrial power distribution. It features a 3-pole configuration with a rated current of 600 A and a voltage rating of 600 V. The unit provides a short-circuit breaking capacity of 50 kA at 50°C. This fixed-nose assembly integrates protection mechanisms within a robust enclosure suitable for high-current applications.

Feature Summary

• Fixed-nose mounting design for secure integration into switchgear assemblies
• Integrated thermal-magnetic protection for overload and short-circuit scenarios
• High interrupting capacity rated at 50 kA for reliable fault clearance

Applications

• Industrial motor control centers
• Main incoming power distribution panels
• Large commercial building electrical systems

Procurement Notes

Verify the specific revision level and accessory compatibility before ordering, as Siemens may update internal components without changing the primary part number. Confirm that the receiving facility has the necessary handling equipment, given the unit's weight of approximately 57 lbs. Ensure all local electrical codes and safety standards are met prior to installation.

Selection Notes

Select this model when a 600 A, 3-pole solution is required for 600 V systems. The 50 kA rating dictates suitability for locations with high available fault currents. Consider the fixed-nose form factor against plug-in alternatives if frequent maintenance access or replacement is anticipated. Verify space constraints within the intended enclosure match the physical dimensions of the sub-assembly.

Part Context

This component belongs to Siemens' industrial circuit breaker portfolio, specifically engineered for heavy-duty power distribution. It serves as a critical protective device in low-voltage networks, ensuring system integrity by isolating faulty sections rapidly. The product line emphasizes durability and precise tripping characteristics for continuous industrial operation.

Replacement Considerations

Publicly confirmed direct substitute part numbers are not available in the provided documentation. Cross-referencing requires consulting official Siemens interchange guides or engineering support to ensure electrical and mechanical compatibility.