The Siemens 3VA4120-5ED34-0AA0 is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 20 Amps and a voltage rating of 480V. It has an interrupting rating of 35kAIC at 480V. The 3VA4120-5ED34-0AA0 has a bolt-on connection type and includes long time and instantaneous trip functions.
HACR Rated, Current Limiting, Reverse Feed, HID Rated, Non-Interchangeable Trip
Product FAQs
6 answers
What panelboards are compatible with the Siemens 3VA4120-5ED34-0AA0?
This 3-pole molded case circuit breaker is engineered to bolt directly onto the busbars of Siemens P1, P2, and P3 panelboards, as well as compatible Siemens switchboards. It is not intended for standard residential load centers.
How are the line and load connections configured on this breaker?
The line side utilizes a standard bolt-on connection to secure the breaker directly to the panelboard busbars. The load side comes equipped with factory-installed lugs that accept 14 AWG to 8 AWG copper or aluminum wiring.
Can the 3VA4120-5ED34-0AA0 be deployed in DC voltage systems?
Yes. While commonly installed in 480VAC commercial power systems, this 20-amp breaker is also fully rated for direct current networks, delivering a robust 85kA interrupting capacity at 250VDC.
Are the trip settings adjustable on the 3VA4120-5ED34-0AA0?
No. This breaker features a TM210 thermal-magnetic trip unit with fixed thermal and fixed magnetic settings. Both the 20-amp overload limit and the instantaneous short-circuit thresholds are permanently set at the factory.
How do the Long-Time and Instantaneous (LI) functions protect my electrical system?
The Long-Time thermal mechanism reacts to prolonged overloads, safely opening the circuit before conductors overheat. The Instantaneous magnetic mechanism quickly interrupts power during high-current short circuits, effectively minimizing downstream equipment damage.
What frame class does the 3VA4120-5ED34-0AA0 belong to?
This unit is built on the Siemens 3VA41 frame size. The 3VA41 is a compact, space-saving footprint used for molded case circuit breakers rated up to 125 amps within the Sentron 3VA series.
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