Free Shipping Over $99
Siemens 3VA5212-5EF31-0AA0 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Panel Mount
Siemens
3VA5212-5EF31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5212-5EF31-0AA0
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens 3VA5212-5EF31-0AA0 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
125A 3 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
Description
Engineered for commercial and industrial applications, this 3-pole, 125A molded case circuit breaker provides reliable line protection. It utilizes a TM240 thermal-magnetic trip unit with adjustable overload and short-circuit settings to accommodate specific system requirements. Designed as a replacement for legacy FXD63B125 breakers, it installs into Siemens P2 and P3 panelboards, switchboards, and enclosures. Rated at 35 kAIC at 480V, it features a 250A frame and HACR certification.Specifications
| Brand | Siemens |
|---|---|
| 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 | 85kA @ 240VAC, 35kA @ 480Y/277VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 18kA @ 600VAC, 50kA @ 250VDC, 50kA @ 500VDC, 50kA @ 750VDC |
| Amperage Range | 88-125A |
|---|
| Frame Type | 3VA52 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P2 Panelboards, Siemens P3 Panelboards, Switchboards, Enclosures |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Padlock Attachment, DIN Rail Adapter, Lug Kits |
|---|---|
| Accessories | Nut Keeper Kit |
| Standards | IEC 60947-2, UL 489 |
| Approval | ABS, CE, CSA, EAC, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed |
Product FAQs
8 answersWhat panelboards are compatible with the Siemens 3VA5212-5EF31-0AA0?
This 3VA52 frame circuit breaker is designed for use with Siemens P2 and P3 panelboards, as well as compatible switchboards and enclosures.
What type of trip unit is installed in this breaker?
It features a TM240 ATAM (Adjustable Thermal, Adjustable Magnetic) trip unit. Both the long-time overload and instantaneous short-circuit trip functions can be adjusted to meet specific application requirements.
What is the adjustable range for the thermal and magnetic trip settings?
For this 125A TM240 trip unit, the thermal overload protection is adjustable from 100A to 125A. The magnetic short-circuit protection is adjustable from 5 to 10 times the continuous current rating.
Can this circuit breaker be used in DC voltage applications?
Yes, it is rated for use in DC systems. It provides a 50kAIC interrupting capacity at 250VDC, 500VDC, and 750VDC.
Is the 3VA5212-5EF31-0AA0 suitable for reverse feed applications?
Yes, Siemens 3VA5 thermal-magnetic molded case circuit breakers are UL listed for reverse feed applications.
What does the 5EF31 in the catalog number signify?
In the Siemens 3VA nomenclature, this section of the part number indicates the breaker has a Class M interrupting rating of 35kA at 480V and is equipped with a TM240 Adjustable Thermal, Adjustable Magnetic trip unit.
Can I install field accessories like shunt trips or auxiliary switches in this breaker?
Yes, the Siemens 3VA5 series supports a wide range of field-installable internal accessories, including auxiliary switches, alarm switches, and shunt trips. These accessories are shared across the 3VA breaker family.
Does this breaker provide ground fault protection?
No, this specific model features an LI (Long-Time, Instantaneous) thermal-magnetic trip unit. It provides overload and short-circuit protection but does not include integrated ground fault equipment protection.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 8 reviews.
Search
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