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Siemens 3VA5212-6EF31-0AA0 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Panel Mount
Siemens
3VA5212-6EF31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5212-6EF31-0AA0
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Siemens 3VA5212-6EF31-0AA0 - 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
Part of the SENTRON 3VA5 series, this 125-amp molded case circuit breaker delivers reliable commercial and industrial power distribution. It is engineered for integration into Siemens P1, P2, and P3 panelboards or switchboards, and serves as a drop-in replacement for discontinued FD63B125 breakers. The unit features a Class H breaking capacity of 65kA at 480VAC and utilizes a TM240 trip unit, providing adjustable thermal and magnetic settings to fine-tune your circuit protection.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5212-6EF31-0AA0 |
| Series | 3VA5 |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC, 500VDC, 750VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 25kA @ 600VAC, 85kA @ 250VDC, 85kA @ 500VDC, 85kA @ 750VDC |
| Amperage Range | 100-125A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Shunt Trip, Undervoltage Release, Motor Operator, Rotary Handle, Handle Lock, Padlock Attachment, DIN Rail Adapter, Lug Kits |
|---|---|
| Accessories | Nut Keeper Plate |
| Standards | IEC 60947-2, UL 489, HACR |
| Approval | ABS, CE, CSA, cULus, DNV, EAC, GL, Lloyd's, RCM, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Trip-Free Mechanism |
Product FAQs
7 answersCan the 3VA5212-6EF31-0AA0 replace older Siemens FD-frame breakers?
Yes, this 3VA5 series breaker is the modern replacement for legacy 125A FD-frame breakers, such as the FD63B125. Upgrading may require a 3VA adapter kit depending on your existing panelboard configuration.
What type of panelboards will accept the 3VA5212-6EF31-0AA0?
This breaker is engineered for integration into modern Siemens P1, P2, and P3 panelboards, as well as Siemens switchboards.
What trip unit is installed in the 3VA5212-6EF31-0AA0?
It features a TM240 thermal-magnetic trip unit. This provides both adjustable thermal protection for overloads and adjustable magnetic protection for short circuits, allowing for precise system coordination.
What is the frame size for this 125A circuit breaker?
This breaker utilizes the Siemens 3VA52 frame, which is a 250A-rated physical frame size, configured here for a 125A continuous current rating.
Is the 3VA5212-6EF31-0AA0 suitable for reverse feeding?
Yes, all Siemens 3VA52 thermal-magnetic trip circuit breakers are UL listed for reverse feed applications.
Are the trip units on the 3VA5212-6EF31-0AA0 interchangeable?
No, the 3VA5 series features non-interchangeable trip units. The TM240 trip unit is factory-installed and cannot be swapped in the field.
Is the 3VA5212-6EF31-0AA0 HACR rated?
Yes, this breaker is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment.
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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