Siemens 3VA5120-4EC31-0AA0 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Panel Mount
Siemens
3VA5120-4EC31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5120-4EC31-0AA0
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Siemens 3VA5120-4EC31-0AA0 - 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
20A 3 Pole Molded Case Circuit Breaker
Description
Built to handle industrial power distribution, this 20-amp molded case circuit breaker belongs to the versatile 3VA5 frame family. It mounts into Siemens P1, P2, and P3 panelboards, acting as a modern substitute for discontinued ED63B020 components. The device is supplied without lugs, allowing contractors to select the exact terminal hardware required for their specific wiring needs. It delivers a 25kA interrupting rating at 480V alongside fixed thermal and adjustable magnetic trip functions.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5120-4EC31-0AA0 |
| Series | 3VA5 |
| Amperage | 20A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 14kA @ 600Y/347VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Lugs, Padlock Attachment |
|---|---|
| Accessories | None (No Lugs Included) |
| Standards | IEC 60947-2, UL 489, HACR |
| Approval | ABS, CE, CSA, EAC, IEC, RCM, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
5 answersIs the 3VA5120-4EC31-0AA0 a direct replacement for older Siemens breakers?
Yes, this 3VA51 frame breaker serves as a modern substitute for discontinued 20A ED-frame breakers, including the ED63B020, in Siemens power distribution systems.
What is the maximum frame capacity of the 3VA5120-4EC31-0AA0?
While this specific model is factory-rated for a 20A continuous current, it is built on the Siemens 3VA51 frame, which has a maximum physical and electrical capacity of 125A.
How is the TM230 trip unit configured on this breaker?
The breaker features a thermal-magnetic trip unit with a fixed thermal setting (long-time) for overload protection and an adjustable magnetic setting (instantaneous), allowing electricians to fine-tune the short-circuit response.
What is required to install this breaker in a Siemens panelboard?
Because the 3VA5120-4EC31-0AA0 is a feed-thru, panel-mount breaker, it does not plug directly onto bus bars. Installation in Siemens P1, P2, or P3 panelboards requires the appropriate mounting hardware or strap kits designed for 3VA51 frames.
Can this breaker be operated without opening the enclosure door?
Yes, the 3VA51 frame is compatible with Siemens door-mounted rotary operators (such as the 3VA9137-0FK31). These accessories include an interlock mechanism that allows manual operation while preventing the cabinet door from being opened when the breaker is energized.
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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