Utilizing thermal-magnetic trip technology, the Siemens 3VA4120-6ED14-0AA0 is a 1-pole, 20A molded case circuit breaker designed for heavy-duty use. It provides fixed LI protection to safeguard electrical circuits. This unit mounts into Siemens P1 through P5 panelboards. Facility managers can also use it to upgrade older systems, as it replaces the legacy LGB1B020B breaker. With an interrupting capacity of 65kA at 277V, it is HACR, HID, and SWD rated, and features reverse feed capability.
Which Siemens panelboards accept the 3VA4120-6ED14-0AA0 circuit breaker?
This breaker is compatible with Siemens P1, P2, P3, P4, and P5 panelboards and switchboards. Depending on the specific panel type, a dedicated twin-mount strap kit or mounting hardware may be required for installation.
Does the 3VA4120-6ED14-0AA0 come with lugs on both the line and load sides?
No. Designed for panelboard mounting, it features a low tab on the infeed line side to connect directly to the panel bus and a standard lug on the load side that accepts 14 AWG to 8 AWG wire.
What are the trip unit specifications for the 3VA4120-6ED14-0AA0?
It is equipped with a TM210 thermal magnetic trip unit featuring fixed thermal overload protection at 20 Amps and fixed magnetic short-circuit protection set at 300 Amps, which is 15 times the continuous current rating.
What interrupting class does the 3VA4120-6ED14-0AA0 belong to?
The 6 in the catalog number indicates it is a Class H, or HEAB, high-interrupting capacity breaker. It delivers elevated fault protection, providing up to 65kA at 277VAC and 150kA at 120VAC.
Can I field-install auxiliary components on the 3VA4120-6ED14-0AA0?
Yes, the 3VA41 frame supports field-installable internal accessories, including auxiliary switches, alarm switches, undervoltage releases, and shunt trips to accommodate custom control schemes.
Is the 3VA4120-6ED14-0AA0 compatible with lockout and tagout devices?
Yes, it can be fitted with a padlocking device, such as Siemens catalog number 3VA9038-0LB11, to securely lock the breaker handle in the OFF position during maintenance.
What is the acceptable operating temperature range for the 3VA4120-6ED14-0AA0?
This breaker is rated for safe continuous operation in ambient temperatures ranging from -25 degrees Celsius to 70 degrees Celsius.
Can the 3VA4120-6ED14-0AA0 replace older Siemens breakers in existing panelboards?
Yes, the 3VA41 series is the modern upgrade path for legacy BQD and NGB breakers. When retrofitting an older Siemens panel, verify that you have the correct 3VA41 strap kit to mount the new frame.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 5 reviews.
Siemens 3VA4160-4ED34-0AA0 - 60A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
7/27/26
SuperBreakers has you covered
SuperBreakers has you covered when you’re in a pinch and need breakers at the last minute. Their customer service is excellent, and the team consistently goes above and beyond to help. I highly recommend them!
RS
Rob S.
Verified Buyer
Reviewing
Siemens 3VA4150-6ED34-0AA0 - 50A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
4/8/26
50 amp breaker
Very helpful and arrived quickly.
JB
Josh B.
Verified Buyer
Reviewing
Siemens 3VA4130-4ED24-0AA0 - 30A 2 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
3/5/26
Breakers
Exactly as described. Quick shipping.
JL
Jeff L.
Verified Buyer
Reviewing
Siemens 3VA4120-6ED14-0AA0 - 20A 1 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
2/11/26
Better than new
Great condition and fast shipping
KC
Ken C.
Verified Buyer
Reviewing
Siemens 3VA4150-4ED34-0AA0 - 50A 3 Pole Molded Case Circuit Breaker