Designed for precise coordination, the Siemens 3VA5270-5EF31-0AA0 is a 3-pole, 70A molded case circuit breaker in a 250A frame. It provides advanced line protection for demanding industrial environments. This breaker installs into Siemens P2, P3, P4, and P5 panelboards. It also serves as a direct replacement for older FXD63B070 models. Rated 35kAIC at 480V, it features a TM240 ATAM trip unit.
What is the frame size of the Siemens 3VA5270-5EF31-0AA0?
This breaker uses the Siemens 3VA52 frame, which is a 250A frame size, even though this specific unit is configured with a 70A continuous current rating.
Can the 3VA5270-5EF31-0AA0 be used to replace older Siemens breakers?
Yes, this 3VA5 series breaker serves as a direct modern replacement for legacy Siemens FXD63B070 molded case circuit breakers.
How are the thermal and magnetic trip settings adjusted on this breaker?
This breaker features a TM240 ATAM trip unit with adjustable dials on the front. The thermal overload protection can be adjusted from 56A to 70A, and the instantaneous short-circuit protection is adjustable from 5 to 10 times the continuous current rating.
What does the LI trip function code mean for this Siemens breaker?
The LI designation indicates that the thermal magnetic trip unit provides Long-Time protection for standard overloads and Instantaneous protection for short circuits.
What breaking capacity class is the 3VA5270-5EF31-0AA0?
This unit is built with a Class M, or medium, breaking capacity. This classification corresponds to its interrupting ratings of 35 kAIC at 480V AC and 18 kAIC at 600V AC.
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Review summary
Customers rate this product 4.8 out of 5 based on 8 reviews.