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Siemens 3VA5340-5EC31-0AA0 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Panel Mount
Siemens
3VA5340-5EC31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5340-5EC31-0AA0
Quantity
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Siemens 3VA5340-5EC31-0AA0 - 400A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty commercial power distribution, this 400A molded case circuit breaker utilizes thermal-magnetic technology to safeguard critical infrastructure. The TM230 trip unit offers fixed thermal and adjustable magnetic (LI) response for tailored defense. This breaker installs into Siemens panelboards and serves as an exact functional cross-reference for legacy JXD63B400 units. A Class M interrupting capacity of 35kA at 480V provides standard-level fault current limitation.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5340-5EC31-0AA0 |
| Series | 3VA5 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480Y/277VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 18kA @ 600VAC |
| Frame Type | 3VA53 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards, Switchboards |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Padlock Attachment, Lug Kits, DIN Rail Adapter |
|---|---|
| Accessories | None (No Lugs Included) |
| Standards | IEC 60947-2, UL 489, HACR Rated |
| Approval | ABS, CE, CSA, EAC, IEC, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | Class M Breaking Capacity, HACR Rated, Current Limiting, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
5 answersWhich legacy Siemens breakers does the 3VA5340-5EC31-0AA0 directly replace?
This breaker is the modern functional replacement for the legacy JD63B400 and JXD63B400 400A 3-pole molded case circuit breakers.
Does the 3VA5340-5EC31-0AA0 come with lugs installed out of the box?
No. Siemens 3VA circuit breakers with catalog numbers ending in "0AA0" are shipped without connection terminals. You must purchase the appropriate standard aluminum or copper lug kits separately based on your specific wire size requirements.
How does the TM230 trip unit operate on this breaker?
The TM230 is a Fixed Thermal, Adjustable Magnetic (FTAM) trip unit. The thermal overload protection is permanently fixed at 400A, while the instantaneous short-circuit protection is adjustable from 5 to 10 times the rated current (2,000A to 4,000A).
Is the 3VA5340-5EC31-0AA0 HACR rated?
Yes, this breaker is HACR rated, meaning it is safety certified for protecting heating, air conditioning, and refrigeration equipment in compliance with NEC requirements.
Can I install auxiliary switches or shunt trips in the 3VA5340-5EC31-0AA0?
Yes, the 3VA5 breaker family supports field-installable internal accessories. Components like auxiliary switches, alarm switches, and shunt trips can be mounted directly into the dedicated accessory pockets under the breaker's front cover.
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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.
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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