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Siemens 3VA5450-5EF31-0AA0 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Panel Mount
Siemens
3VA5450-5EF31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5450-5EF31-0AA0
Quantity
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Siemens 3VA5450-5EF31-0AA0 - 500A 3 Pole Molded Case Circuit Breaker
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Description
Part of the Sentron 3VA5 series, the Siemens 3VA5450-5EF31-0AA0 is a 3-pole, 500A molded case circuit breaker built for commercial and industrial power distribution. This panel-mount MCCB installs into Siemens switchboards and panelboards. It serves as an exact replacement for the discontinued LXD63B500. Rated for Class M breaking capacity, it delivers 35 kAIC at 480VAC. The TM240 trip unit provides adjustable thermal and magnetic settings.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5450-5EF31-0AA0 |
| Series | 3VA5 |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Amperage Range | 350-500A |
|---|
| Frame Type | 3VA54 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards, Switchboards |
| 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 |
|---|---|
| Accessories | None (No Lugs Included) |
| Standards | IEC 60947-2, UL 489, CSA C22.2 No. 5 |
| Approval | ABS, CCC, CE, CSA, DNV, EAC, GL, IEC, LRS, RCM, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
7 answersWhich legacy Siemens breaker does the 3VA5450-5EF31-0AA0 replace?
This 3VA54 frame breaker can serve as a replacement for the discontinued LXD63B500 molded case circuit breaker. A retrofit mounting kit is required when upgrading an existing panelboard to the newer 3VA series.
What are the specific adjustment ranges for the TM240 trip unit on this 500A breaker?
The TM240 ATAM trip unit features an adjustable thermal overload (Ir) dial ranging from 400A to 500A. The magnetic short-circuit pickup (Ii) is also adjustable from 2500A to 5000A, which is 5 to 10 times the rated continuous current.
Is the 3VA5450-5EF31-0AA0 compatible with standard residential load centers?
No. This 3VA54 frame breaker is built for commercial and industrial power distribution and is designed exclusively for Siemens panelboards and switchboards. It will not fit in standard residential load centers.
How are internal accessories installed in the 3VA5450-5EF31-0AA0?
The 3VA5 series features dedicated accessory pockets under the front cover. This allows for the field installation of internal accessories like shunt trips, auxiliary switches, and alarm contacts without opening the sealed breaker mechanism.
What does the Class M designation indicate for this Siemens breaker?
In the Siemens 3VA nomenclature, Class M indicates the interrupting capacity tier. For this 3VA54 frame, the Class M rating corresponds to a 35 kAIC interrupting capacity at 480V AC.
What is the physical frame size of this 500A circuit breaker?
This breaker is built on the Siemens 3VA54 frame, which has a maximum physical capacity of 600A. While the frame can handle up to 600A, this specific model is factory-rated for a maximum continuous current of 500A.
Does this breaker provide ground fault protection?
No. The 3VA5450-5EF31-0AA0 is equipped with a thermal-magnetic trip unit for overload and short-circuit protection only. It does not have integrated ground fault protection capabilities.
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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