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Siemens 3VA5120-5EC31-0AA0 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Panel Mount
Siemens
3VA5120-5EC31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5120-5EC31-0AA0
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Siemens 3VA5120-5EC31-0AA0 - 20A 3 Pole Molded Case Circuit Breaker
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20A 3 Pole Molded Case Circuit Breaker
20A 3 Pole Molded Case Circuit Breaker
Description
Offering high-performance circuit defense, the Siemens 3VA5120-5EC31-0AA0 is a 3-pole, 20A molded case circuit breaker from the 3VA5 frame group. It provides reliable long-time and instantaneous protection for commercial and industrial applications. Designed for panel mount configurations, it fits into Siemens P2 through P5 panelboards and replaces the discontinued HED43B020. This unit features a 35kA interrupting rating at 480V, fixed thermal and adjustable magnetic trip, and lug terminals.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5120-5EC31-0AA0 |
| Series | 3VA5 |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 85kA @ 240VAC, 35kA @ 480Y/277VAC, 35kA @ 480VAC, 18kA @ 600Y/347VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P2, P3, P4, P5 Panelboards, Switchboards, Enclosures |
| 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, Padlock Attachment, Motor Operator, Rotary Handle, DIN Rail Adapter |
|---|---|
| Accessories | Nut Keeper |
| Standards | IEC 60947-2, UL 489, CSA C22.2 No. 5 |
| Approval | ABS, CE, CSA, DNV, EAC, Lloyd's, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
6 answersDoes the 3VA5120-5EC31-0AA0 come with terminal lugs?
No, the -0AA0 suffix indicates this breaker ships without lugs or connection hardware. Lugs or nut keeper kits must be purchased separately for field installation.
What does the 5 in the 3VA5120-5EC31-0AA0 catalog number signify?
The 5 indicates a Class M breaking capacity, which provides an interrupting rating of 35kA at 480V AC.
What type of trip unit is included in the 3VA5120-5EC31-0AA0?
This breaker features a TM230 thermal magnetic trip unit. It provides fixed thermal protection for overloads and adjustable magnetic protection for short circuits.
Which legacy Siemens breaker frames does the 3VA51 series replace?
The 3VA51 125A frame breakers are the modern replacements for legacy Siemens ED frame circuit breakers.
Can the 3VA5120-5EC31-0AA0 be used in DC applications?
Yes, this breaker is rated for use in DC systems up to 500V DC. When used in 500V ungrounded DC systems, all three poles must be wired in series.
Which Siemens panelboards accept the 3VA5120-5EC31-0AA0?
This breaker is designed for use in Siemens P2, P3, P4, and P5 panelboards, as well as compatible switchboards and enclosures. Proper mounting hardware or strap kits are required.
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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