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Siemens 3VA5330-5EC31-0AA0 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Panel Mount
Siemens
3VA5330-5EC31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5330-5EC31-0AA0
Quantity
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Siemens 3VA5330-5EC31-0AA0 - 300A 3 Pole Molded Case Circuit Breaker
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Description
Constructed around the robust 3VA53 frame, this 300A, 3-pole MCCB provides dependable power distribution for commercial and industrial facilities. It features a TM230 thermal-magnetic trip unit with fixed long-time and adjustable instantaneous protection. Designed for panel mounting, it fits Siemens 3VA, P4, and P5 panelboards using standard hardware kits. Facility managers can also use it to upgrade legacy JD63B300 breakers. With a 35kAIC rating at 480VAC, this breaker is current-limiting.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5330-5EC31-0AA0 |
| Series | 3VA5 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480Y/277VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC, 18kA @ 600VAC, 50kA @ 500VDC |
| Frame Type | 3VA53 |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens 3VA Panelboards, Siemens P4/P5 Panelboards (with kit), 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, Padlock Attachment, Motor Operator, Rotary Handle, Lug Kits, Busbar System |
|---|---|
| Accessories | None (No Lugs Included) |
| Standards | IEC 60947-2, UL 489, CSA C22.2 No. 5 |
| Approval | ABS, CE, CSA, cULus, DNV, EAC, Lloyd's, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Trip-Free Mechanism |
Product FAQs
7 answersWhat legacy Siemens breaker does the 3VA5330-5EC31-0AA0 replace?
This 3VA53 frame breaker is the direct modern replacement for the legacy 300A JD63B300 molded case circuit breaker. When retrofitting this unit into older Sentron panelboards, a dedicated mounting adapter kit is required to accommodate the newer frame design.
What is the adjustable magnetic trip range for this 300A breaker?
The TM230 trip unit features a fixed thermal overload set at 300A and an adjustable instantaneous short-circuit protection. The magnetic trip can be adjusted from 5 to 10 times the continuous current rating, providing a trip range of 1500A to 3000A.
How is this breaker installed in standard P4 or P5 panelboards?
While it mounts directly into modern 3VA panelboards, installing this 3VA53 frame breaker into legacy Siemens P4 or P5 panelboards requires a specific hardware adapter kit to properly align the mounting points and bus connections.
Does this 3VA5 series breaker provide current-limiting protection?
Yes, Siemens 3VA5 molded case circuit breakers are current-limiting according to UL 489. During a short circuit, the breaker rapidly clears the fault, reducing the peak let-through current and minimizing thermal and dynamic stress on downstream equipment.
Can this 3-pole breaker be applied in DC voltage systems?
Yes, it carries a DC interrupting rating of 50kA at 500VDC. When applying a 3-pole thermal-magnetic breaker in a DC circuit, consult the manufacturer's documentation to ensure the poles are properly wired in series based on the specific voltage and grounding configuration of the system.
Is this 300A breaker suitable for reverse-feed installations?
Yes, this thermal-magnetic breaker is capable of reverse feeding. Incoming power can be connected to either the line or load side terminals without degrading its protective characteristics or interrupting ratings.
Is this breaker HACR rated for HVAC applications?
Yes, it carries an HACR rating, making it fully certified to provide branch circuit overcurrent protection for commercial heating, air conditioning, and refrigeration equipment.
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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