Siemens 3VA5120-4EF31-0AA0 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Panel Mount
Siemens
3VA5120-4EF31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5120-4EF31-0AA0
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Siemens 3VA5120-4EF31-0AA0 - 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 for demanding commercial environments, the Siemens 3VA5120-4EF31-0AA0 is a 20A molded case circuit breaker equipped with a TM240 trip unit. It delivers precise long-time and instantaneous protection for industrial enclosures. This 3-pole breaker mounts into Siemens P2 through P5 panelboards and serves as a functional substitute for the legacy ED63B020. Featuring adjustable thermal and magnetic trip functions, it provides a 25kA breaking capacity at 480V and supports reverse feed.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5120-4EF31-0AA0 |
| 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 |
| Amperage Range | 16-20A |
|---|
| 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 | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Shunt Trip, Undervoltage Release, Motor Operator, Rotary Handle, Handle Tie, Padlock Attachment, Lug Kits, DIN Rail Adapter |
|---|---|
| Accessories | None (Nut Keeper Included) |
| Standards | IEC 60947-2, UL 489, HACR |
| Approval | ABS, CE, CSA, EAC, IEC, UL, VDE |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Current Limiting, Reverse Feed, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards accept the 3VA5120-4EF31-0AA0 circuit breaker?
This breaker is compatible with Siemens P2, P3, P4, and P5 panelboards, as well as Siemens switchboards and standalone enclosures.
What type of trip unit is installed in the 3VA5120-4EF31-0AA0?
It features a TM240 ATAM thermal-magnetic trip unit with adjustable Long-Time (L) and Instantaneous (I) protection functions.
What are the adjustable trip settings for this 20A Siemens breaker?
The thermal overload protection (Ir) is adjustable from 16A to 20A. The instantaneous short-circuit protection (Ii) can be set between 150A and 300A, which is 7.5 to 15 times the rated continuous current.
What is the frame size of the 3VA5120-4EF31-0AA0?
It is built on the Siemens 3VA51 frame, which has a maximum capacity of 125A.
Can the 3VA5120-4EF31-0AA0 be reverse fed?
Yes, Siemens 3VA5 thermal-magnetic circuit breakers are UL listed for reverse feed installations.
Is this breaker rated for direct current (DC) systems?
Yes, it carries both AC and DC voltage ratings. Consult Siemens documentation for proper pole wiring configurations when applying it to DC circuits.
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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