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Siemens 3VA5120-4EF41-0AA0 4-Pole Circuit Breaker — 20A

Siemens 3VA5 UL Frame 125 4-pole circuit breaker.

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ManufacturerSiemens

Part number3VA5120-4EF41-0AA0

Part Number 3VA5120-4EF41-0AA0

Manufacturer Siemens

Frame Size 125

Poles 4

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4-pole circuit breaker UL Frame 125 25 kA @ 480V TM240 protection Adjustable Ir and Ii Unprotected N conductor

Product description

The Siemens 3VA5120-4EF41-0AA0 is a 4-pole 3VA5 UL frame 125 circuit breaker with a breaking capacity class S, rated at 25 kA at 480 V. It features TM240 technology for overload protection (Ir=16 A...20 A) and adjustable short-circuit protection (Ii=7.5...15 x In). The N conductor is unprotected.

This 4-pole breaker is ideal for applications requiring protection on all four conductors of a three-phase system, including those with neutral loads or specific grounding requirements. It is well-suited for industrial machinery, control systems, and power distribution.

Stanlo Automation, a veteran-owned supplier, provides the Siemens 3VA5120-4EF41-0AA0. Rely on us for quality surplus industrial automation components to keep your operations running.

Technical specifications

Part Number	3VA5120-4EF41-0AA0
Manufacturer	Siemens
Frame Size	125
Poles	4
Breaking Capacity Class	S
Breaking Capacity	25 kA @ 480 V
Protection Type	TM240
In	20 A
Ir	16 A...20 A
Ii	7.5...15 x In
N conductor	unprotected

Common applications

Industrial machinery

Control systems

Four-wire power distribution

Three-phase with neutral loads

Generator protection

Compatible systems

Industrial power distribution Four-wire electrical systems Motor control circuits Control panels

Also known as

Siemens 4-pole MCCB 3VA5120-4EF41 Siemens 20A 4-pole breaker

Replaces / compatible with

This 4-pole breaker provides comprehensive protection for systems requiring switched neutral. It's a direct replacement for similar Siemens 3VA5 configurations.

Technical note

Expert tip

The adjustable overload (Ir) and short-circuit (Ii) settings on the TM240 trip unit allow for precise protection coordination in complex industrial electrical systems.

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Frequently asked questions

What does 'N conductor unprotected' mean for the 3VA5120-4EF41-0AA0?

The 'N conductor unprotected' designation means that the neutral pole in this 4-pole circuit breaker is not equipped with overcurrent protection. This is a specific design choice for certain system configurations.