Siemens
Siemens 3VA5120-4ED31-0AA0 3-Pole Circuit Breaker — 20A
Siemens 3VA5 UL Frame 125 3-pole circuit breaker.
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3-pole circuit breaker
UL Frame 125
25 kA @ 480V breaking capacity
TM210 protection
In=20A
Permanently set short-circuit protection
Product description
The Siemens 3VA5120-4ED31-0AA0 is a 3-pole 3VA5 UL frame 125 circuit breaker with a breaking capacity class S, rated at 25 kA at 480 V. It features TM210 protection, with an overload setting (Ir) of 20 A and permanently set short-circuit protection (Ii) of 15 x In.
This 20A, 3-pole breaker is suitable for protecting circuits in industrial and commercial applications, such as branch circuits, smaller motor loads, and control power. Its 480V rating is standard for many industrial settings.
Stanlo Automation, a veteran-owned company, offers this Siemens 3VA5120-4ED31-0AA0 circuit breaker. We provide reliable surplus automation parts to help maintain your operational efficiency.
Technical specifications
| Part Number | 3VA5120-4ED31-0AA0 |
| Manufacturer | Siemens |
| Frame Size | 125 |
| Poles | 3 |
| Breaking Capacity Class | S |
| Breaking Capacity | 25 kA @ 480 V |
| Protection Type | TM210 |
| In | 20 A |
| Ir | 20 A |
| Ii | 15 x In |
Common applications
Branch circuit protection
Small motor loads
Industrial control circuits
Commercial power distribution
Panelboards
Compatible systems
Industrial control panels
Three-phase branch circuits
Machine tool wiring
Standard 480V systems
Also known as
Siemens 20A 3-pole breaker
3VA5120-4ED31
Siemens UL 125A frame breaker
Replaces / compatible with
This breaker is a specific 20A, 3-pole configuration in the 3VA5 series. It can replace older Siemens breakers with similar ratings and functionality.
Technical note
Expert tip
With a permanently set Ii of 15xIn, this breaker is designed for applications where rapid clearing of high short-circuit currents is essential.What happens next?
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Frequently asked questions
What is the overload protection setting for the Siemens 3VA5120-4ED31-0AA0?
The Siemens 3VA5120-4ED31-0AA0 circuit breaker has an overload protection setting (Ir) of 20 A, matching its nominal current (In). This provides protection against sustained overcurrent conditions.