Siemens 3VA5320-7EC31-0AA0 Molded Case Circuit Breaker

The TM230 FTAM trip unit features a fixed thermal overload (Ir) set at 200A and an adjustable magnetic short-circuit pickup (Ii). The magnetic trip can be adjusted from 5 to 10 times the continuous current rating, allowing a trip range of 1000A to 2000A.

FTAM stands for Fixed Thermal, Adjustable Magnetic. This indicates that the thermal overload protection is fixed at the 200A rating, while the magnetic short-circuit protection can be adjusted by the user to coordinate with downstream loads.

While this specific circuit breaker has a continuous current rating of 200A, it is built on the larger Siemens 3VA53 400A frame.

The -0AA0 suffix indicates this breaker is supplied from the factory without lugs. To terminate conductors, you will need to order the appropriate 3-pole lug kits separately, such as the 3VA9373-0JB13 for aluminum wire or 3VA9373-0JD13 for copper wire.

This breaker is designed for use in Siemens 3VA-series panelboards and switchboards. It specifically fits into Siemens P-Series distribution panels that are configured to accept 3VA53 400A frame devices.

This standard -0AA0 version is rated for 80% continuous current. If your application requires a 100%-rated breaker, you will need to source the alternate version with the -2AA0 suffix (catalog number 3VA5320-7EC31-2AA0).

The 7 indicates that this breaker belongs to Siemens' Class C (CJAS) interrupting tier. This provides a very high interrupting capacity of 100kA at 480V AC and 200kA at 240V AC.

Yes, the 3VA53 3-pole frame features internal accessory pockets that accept field-installable accessories, including auxiliary switches, shunt trips, and undervoltage releases.

To order the NAVAL-rated version certified to UL 489 Supplement SB, change the 13th digit of the catalog number from 0 to 1. The resulting catalog number for the NAVAL-rated equivalent is 3VA5320-7EC31-1AA0.