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Siemens 3VA5112-5ED31-0AA0 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Panel Mount
Siemens
3VA5112-5ED31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5112-5ED31-0AA0
Quantity
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Siemens 3VA5112-5ED31-0AA0 - 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
Built for commercial and industrial applications, the Siemens 3VA5112-5ED31-0AA0 is a 3-pole, 125A molded case circuit breaker from the Sentron 3VA5 family. It provides reliable line protection with a TM210 fixed thermal and fixed magnetic trip unit. This panel mount breaker installs into Siemens P2, P3, P4, and P5 panelboards or switchboards. It serves as a modern replacement for legacy HED43B125 breakers when used with the appropriate mounting kit. Rated for 35kA at 480VAC (Class M).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 |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P2, P3, P4, P5 Panelboards, Switchboards, Enclosures |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Shunt Trip, Undervoltage Release, Motor Operator, Rotary Handle, Handle Tie, Padlock Attachment, Lug Kits, DIN Rail Adapter |
|---|---|
| Accessories | Nut Keeper |
| Standards | IEC 60947-2, UL 489, CSA C22.2 No. 5 |
| Approval | ABS, CE, CSA, DNV, EAC, Lloyd's, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards can accept the 3VA5112-5ED31-0AA0 branch breaker?
This 3VA51 frame circuit breaker is designed for installation in Siemens P2, P3, P4, and P5 series panelboards and switchboards. You will need to use a dedicated 3VA51 mounting strap kit or hardware provision kit specific to your panel model, as these breakers do not mount directly to the bus without it.
Can I use this 3VA5 breaker to replace an older HED43B125?
Yes, the 3VA5112-5ED31-0AA0 is the modern replacement for legacy Siemens HED43B125 circuit breakers. Because the physical frame design is different, you cannot reuse your old HED4 mounting hardware. A new strap kit designed for the 3VA51 frame is required for panelboard installation.
Does the trip unit on the 3VA5112-5ED31-0AA0 allow for field adjustments?
No. It comes equipped with a fixed TM210 thermal-magnetic trip unit. Both the long-time overload and instantaneous short-circuit protection settings are permanently set at the factory and are non-adjustable.
What does the Class M breaking capacity signify for this breaker?
Class M designates a medium interrupting capacity tier within the Siemens 3VA lineup. For this 125A model, it guarantees the breaker can safely clear a 35kA fault at 480V AC, or an 85kA fault at 240V AC.
What are the physical dimensions of this 3-pole breaker?
The 3VA5112-5ED31-0AA0 utilizes the standard 3VA51 frame footprint. It measures approximately 5.5 inches in height, 3 inches in width (1 inch per pole), and 3.7 inches in depth.
Is this circuit breaker approved for DC power distribution?
Yes, it is fully rated for DC voltages up to 500V DC with an 85kA maximum interrupting rating. Siemens approves this 3VA5 trip unit specifically for protecting cables, lines, and non-motorized DC loads in industrial environments.
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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