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Siemens 3VA5120-5EF31-0AA0 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Panel Mount
Siemens
3VA5120-5EF31-0AA0
Molded Case Circuit Breaker
Brand
Siemens
SKU
3VA5120-5EF31-0AA0
Quantity
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Siemens 3VA5120-5EF31-0AA0 - 20A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for industrial environments, the Siemens 3VA5120-5EF31-0AA0 is a 3-pole, 20A molded case circuit breaker. It features a TM240 trip unit with adjustable thermal and magnetic settings to fine-tune protection. This panel mount breaker installs into Siemens P1, P2, and P3 panelboards, switchboards, and motor control centers. It serves as an upgrade for legacy ED63B020 and ED43B020 units. Rated 35kAIC at 480V, this Class M breaker provides robust current-limiting performance.Specifications
| Brand | Siemens |
|---|---|
| Part Number | 3VA5120-5EF31-0AA0 |
| 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, 50kA @ 500VDC |
| Amperage Range | 14-20A |
|---|
| 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 | Adjustable Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Lugs, Padlock Attachment |
|---|---|
| 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 answersWhich legacy Siemens circuit breakers does the 3VA5120-5EF31-0AA0 replace?
This 3VA5 series breaker serves as a modern replacement and upgrade for legacy Siemens ED63B020 and ED43B020 molded case circuit breakers.
What is the frame size for the 3VA5120-5EF31-0AA0?
This breaker is built on the Siemens 3VA51 frame, which has a maximum capacity of 125A, though this specific unit is equipped with a 20A trip unit.
What interrupting class does the 3VA5120-5EF31-0AA0 belong to?
This breaker belongs to the Siemens Class M interrupting class, which designates its medium breaking capacity of 35kA at 480V.
How is the trip unit configured on this breaker?
It utilizes a TM240 thermal-magnetic trip unit that allows for both adjustable thermal and adjustable magnetic settings, enabling precise calibration during installation.
Is the 3VA5120-5EF31-0AA0 suitable for heating, air conditioning, and refrigeration applications?
Yes, this breaker is HACR rated, making it suitable for protecting HVAC and refrigeration equipment circuits.
Can this circuit breaker be reverse fed?
Yes, the 3VA5120-5EF31-0AA0 is suitable for reverse feed applications, allowing flexibility in wiring orientation during installation.
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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