Siemens 3VA5445-7EF31-0AA0 Molded Case Circuit Breaker
- 450A
- 3 Pole
- Panel Mount
Siemens
3VA5445-7EF31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5445-7EF31-0AA0
Quantity
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Siemens 3VA5445-7EF31-0AA0 - 450A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for demanding industrial environments, the 3VA5445-7EF31-0AA0 is a 450-amp, 3-pole molded case circuit breaker from the Siemens SENTRON series. It provides robust long-time and instantaneous (LI) protection for commercial switchboards. This 3VA54 frame breaker mounts into modern Siemens 3VA panelboards.Specifications
| Brand | Siemens |
|---|---|
| Series | 3VA5 |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 35kA @ 600VAC |
| Amperage Range | 315-450A |
|---|
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens 3VA 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, Padlock Attachment, Handle Lock |
|---|---|
| Accessories | None (No Lugs Included) |
| Standards | IEC 60947-2, UL 489, HACR |
| Approval | ABS, CE, CSA, EAC, IEC, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
5 answersCan the 3VA5445-7EF31-0AA0 replace older Siemens LD-frame circuit breakers?
Yes. When paired with the appropriate retrofit kit, this breaker can serve as a reliable replacement for discontinued legacy 450A LD-frame breakers, such as the LXD63B450.
What is the specific frame size of the 3VA5445-7EF31-0AA0?
This unit is built on the Siemens 3VA54 frame, which has a maximum capacity of 600A.
Which specific trip unit is installed in the 3VA5445-7EF31-0AA0?
It is equipped with a TM240 ATAM thermal-magnetic trip unit. This provides precise coordination capabilities through adjustable long-time (thermal) and adjustable instantaneous (magnetic) protection settings.
Is the 3VA5445-7EF31-0AA0 suitable for reverse feed applications?
Yes, Siemens 3VA5 thermal-magnetic circuit breakers are UL listed for reverse feed applications.
How should this breaker be wired for 500VDC applications?
When applied on 500V ungrounded DC systems, the power supply must be connected in a zig-zag configuration across the three poles to ensure the voltage is uniformly distributed across the breaker terminals.
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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