Free Shipping Over $99
Siemens 3VA5445-5EC31-0AA0 Molded Case Circuit Breaker
- 450A
- 3 Pole
- Panel Mount
Siemens
3VA5445-5EC31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5445-5EC31-0AA0
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens 3VA5445-5EC31-0AA0 - 450A 3 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
450A 3 Pole Molded Case Circuit Breaker
500A 3 Pole Molded Case Circuit Breaker
600A 3 Pole Molded Case Circuit Breaker
Description
Engineered for industrial applications, the Siemens 3VA5445-5EC31-0AA0 is a 450A molded case circuit breaker from the SENTRON 3VA5 family. This panel-mount unit installs into Siemens 3VA panelboards, switchboards, and motor control centers. It serves as a direct replacement for legacy LXD63B450 and LD63B450 models. Rated 35 kAIC at 480VAC, it utilizes a TM230 thermal-magnetic trip unit with fixed long-time and adjustable instantaneous (LI) protection. The current-limiting design is HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Series | 3VA5 |
| Amperage | 450A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | 3VA54 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens 3VA Panelboards, Switchboards, Motor Control Centers |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Shunt Trip, Undervoltage Release, Motor Operator, Lug Kits |
|---|---|
| Accessories | None (Without Connection) |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
6 answersWhich legacy Siemens breakers can the 3VA5445-5EC31-0AA0 replace?
This modern 3VA54 frame breaker can be used to upgrade or replace legacy Siemens LXD63B450 and LD63B450 circuit breakers in industrial power distribution systems.
What type of trip unit is installed in the 3VA5445-5EC31-0AA0?
This breaker features a TM230 thermal magnetic trip unit. It provides fixed long-time (thermal) overload protection at 450A and an adjustable instantaneous (magnetic) short-circuit trip setting.
What is the breaking capacity class for this 3VA54 frame breaker?
This unit has a Class M (Medium) breaking capacity, which corresponds to its 35kA interrupting rating at 480VAC.
Is the 3VA5445-5EC31-0AA0 a 100% rated circuit breaker?
No, this is a standard 80% rated circuit breaker under UL 489 guidelines. Continuous loads should not exceed 80% of its 450A nominal rating.
Is this Siemens 450A breaker HACR rated?
Yes, this breaker features a current-limiting design that is HACR rated, making it suitable for heating, air conditioning, and refrigeration equipment applications.
What is the standard calibration temperature for this breaker?
The thermal magnetic trip unit is calibrated for a standard ambient operating temperature of 40 degrees Celsius (104 degrees Fahrenheit).
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