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Siemens 3VA5112-5EC31-0AA0 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Panel Mount
Siemens
3VA5112-5EC31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5112-5EC31-0AA0
Quantity
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Siemens 3VA5112-5EC31-0AA0 - 125A 3 Pole Molded Case Circuit Breaker
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125A 3 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
Description
Designed for demanding power distribution networks, this 125A MCCB delivers robust long-time and instantaneous (LI) fault protection. The 3VA51 frame design supports extensive commercial and industrial switchgear requirements. It mounts into Siemens P1, P2, P3, and 3VA panelboards, serving as a modern replacement for the legacy ED63B125 when paired with a mounting kit. This unit features a TM230 thermal-magnetic trip with fixed thermal and adjustable magnetic settings for system coordination.Specifications
| Brand | Siemens |
|---|---|
| Series | 3VA5 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 85kA @ 500VDC |
| Frame Type | 3VA51 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards, 3VA Panelboards, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, DIN Rail Adapter, Handle Lock, Padlock Attachment |
|---|---|
| Accessories | None (Nut Keeper Only) |
| Standards | IEC 60947-2, UL 489, CSA C22.2 No. 5 |
| Approval | ABS, CE, CSA, EAC, IEC, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
6 answersWhat does the TM230 trip unit in the 3VA5112-5EC31-0AA0 offer for adjustability?
The TM230 is a thermal-magnetic trip unit featuring a fixed thermal setting for overload protection at 125A and an adjustable magnetic setting for short-circuit protection. The magnetic trip can be configured from 5 to 10 times the continuous current rating.
Can the 3VA5112-5EC31-0AA0 replace an older ED frame Siemens breaker?
Yes, this 3VA51 frame model serves as a modern equivalent to legacy ED frame units, such as the ED63B125, when installed in Siemens P1, P2, or P3 panelboards using the appropriate adapter kit.
Does the 3VA5112-5EC31-0AA0 include terminal lugs for bare wire connections?
No, the -0AA0 suffix in the catalog number indicates it ships with nut keepers, or punched copper bars, rather than standard box lugs. Compatible mechanical or compression lugs must be purchased separately if you are connecting bare wire.
What breaking capacity class does the 3VA5112-5EC31-0AA0 fall under?
The number 5 following the frame and amperage in the catalog number (3VA5112-5) denotes it as an M-Class breaking capacity breaker. This internal code determines the specific short-circuit interrupting capabilities across different voltages within the Siemens 3VA portfolio.
Can I backfeed or reverse feed the 3VA5112-5EC31-0AA0?
Yes, the internal construction of this thermal-magnetic breaker permits reverse feeding. It is also HACR rated for safe use with heating, air conditioning, and refrigeration equipment.
How is this breaker mounted into Siemens panelboards?
This feed-thru MCCB requires specific mounting hardware or an adapter kit depending on whether it is being installed in a 3VA panelboard or retrofitted into P1, P2, or P3 panelboards and switchboards.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 8 reviews.
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Rating
8 reviews
- EAEdward A.Verified BuyerReviewingSiemens 3VA5112-5EC31-0AA0 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26Quick Shipping
Instock and quick free shipping over a $100
- JFJustin F.Verified BuyerReviewingSiemens 3VA5450-5EC31-0AA0 - 500A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/2/26SIEMENS BREAKER WAS SENT NEXT DAY...
ORDER CAME WHEN IT WAS PROMISSED AND WAS CORRECT... HAPPY CUSTOMER.
THANK YOU,
JUSTIN
- GMGary M.Verified BuyerRated 4 out of 5 stars6/19/26Hard to find Siemens breaker
Great product at a fair price
- RJRene J.Verified BuyerReviewingSiemens 3VA5212-6EF31-0AA0 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars4/13/26Siemens 3VA5212-6EF31-0AA0
Item arrived quickly and in perfect condition
- DTDENNIS T.Verified BuyerReviewingSiemens 3VA5220-6ED31-0AA0 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/15/26Breaker Purchase
Great price and fast shipment