Siemens 3VA4112-4ED14-0AA0 molded case circuit breaker is rated 125A and 277VAC, with 1 pole and a 25kAIC interrupting rating at 277V. This single-phase 3VA family breaker has a 3VA41 frame and series, a thermal magnetic trip with fixed thermal and fixed magnetic adjustments, and long-time and instantaneous trip functions. It features panelboard and switchboard mounting, a load side lug, standard protection and UL approval. Dimensions are 5.09 in high, 1 in wide and 2.96 in deep. Standards include WEEE, RoHS and REACh.
How should I use the 125A current rating when selecting this breaker?
The Siemens 3VA4112-4ED14-0AA0 is rated 125A. Coordinate this rating with the circuit load and conductor protection requirements when selecting the breaker.
What circuit voltage should I check before selecting this breaker?
The breaker is rated 277VAC. Check the circuit operating voltage against this rating when selecting it for an AC application.
How do I use the 25kAIC interrupting rating?
The interrupting rating is 25kAIC at 277V. Compare it with the available fault current at the installation point, which must not exceed the breaker's interrupting capacity at that voltage.
How does the thermal-magnetic trip protect the circuit?
The thermal element provides long-time overload protection, while the magnetic element provides instantaneous response to high fault current. These functions address sustained overloads and short-circuit conditions.
Can I adjust the thermal or magnetic trip settings?
Both the thermal and magnetic trip settings are fixed. Select this breaker when fixed protection settings meet the circuit's protection requirements rather than relying on field adjustment.
What does the single-pole configuration mean for circuit selection?
This breaker has 1 pole and is single-phase. The single pole interrupts one circuit path, so use the pole count when determining the circuit's switching and protection arrangement.
How is the load-side conductor connected?
The load-side terminal uses a lug connection. Plan the outgoing conductor termination as a lug connection when laying out the circuit wiring.
What dimensions should I use when planning the installation layout?
The breaker is 5.09 in high, 1 in wide and 2.96 in deep. Use all three dimensions when planning enclosure space and conductor routing.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 5 reviews.
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I recommend this product
Rated 5 out of 5 stars
7/27/26
SuperBreakers has you covered
SuperBreakers has you covered when you’re in a pinch and need breakers at the last minute. Their customer service is excellent, and the team consistently goes above and beyond to help. I highly recommend them!
RS
Rob S.
Verified Buyer
Reviewing
Siemens 3VA4150-6ED34-0AA0 - 50A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
4/8/26
50 amp breaker
Very helpful and arrived quickly.
JB
Josh B.
Verified Buyer
Reviewing
Siemens 3VA4130-4ED24-0AA0 - 30A 2 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
3/5/26
Breakers
Exactly as described. Quick shipping.
JL
Jeff L.
Verified Buyer
Reviewing
Siemens 3VA4120-6ED14-0AA0 - 20A 1 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
2/11/26
Better than new
Great condition and fast shipping
KC
Ken C.
Verified Buyer
Reviewing
Siemens 3VA4150-4ED34-0AA0 - 50A 3 Pole Molded Case Circuit Breaker