Engineered for commercial applications, the Siemens NGB3K080B provides robust overcurrent protection. This 3-pole, 80A MCCB features a fixed thermal-magnetic trip unit for long-time and instantaneous functions. It mounts into Siemens P1 through P5 panelboards and can be replaced by the 3VA5180-4ED36-0AA0 using a mounting kit. Rated 100kAIC at 240V and 25kAIC at 480Y/277V, this HACR-rated breaker supports reverse-feed applications and includes load lugs for immediate wiring.
Which Siemens panelboards are compatible with the NGB3K080B circuit breaker?
This bolt-on breaker is designed for use in Siemens P1, P2, P3, P4, and P5 series panelboards. It mounts directly to the panel bus using bolted connections for secure power distribution in commercial and industrial applications.
What type of wire and gauge sizes can be used with the factory lugs?
The included lugs accept both copper and aluminum conductors. For copper wire, the acceptable range is 8 AWG to 1/0 AWG. For aluminum wire, the range is 8 AWG to 2/0 AWG. Always verify the required torque specifications printed on the breaker before terminating.
Can the NGB3K080B be used in DC voltage applications?
Yes, in addition to its AC ratings, this breaker is rated for DC applications up to 125/250VDC with an interrupting capacity of 14kA. It is suitable for both AC and DC systems within its specified voltage limits.
Are the thermal and magnetic trip settings adjustable on this Sentron series breaker?
No, the NGB3K080B features fixed thermal and fixed magnetic trip elements. The long-time and instantaneous trip functions are factory set for 80 amps and cannot be modified in the field.
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Reviews
Review summary
Customers rate this product 4.5 out of 5 based on 8 reviews.
Siemens NGB3B015B - 15A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
9/16/26
480v breakers
The breakers work great
BP
Bland P.
Verified Buyer
Reviewing
Siemens NGB3B100 - 100A 3 Pole Molded Case Circuit Breaker
I do not recommend this product
Rated 1 out of 5 stars
7/22/26
NO LUGS!!
I ordered this breaker and it arrived with no lugs. It was advertised as new so we didn't open the box and check until the shutdown we needed it for. When we discovered the lugs were missing we sent an email requesting a set overnighted. We didn't get a response for a couple of days, at which point we had already ordered lugs from their competitor Simply Breakers. They asked for pictures and questioned weather we had ordered the correct breaker asking if we needed lugs on both sides. This is a panel breaker and their is only one configuration that I am aware of which is bolted to bus in panel and wires to the three lugs on the other side. I have never had to order lugs separately for this style of breaker. They asked for pictures of box and what was in it, of course at this point the breaker is already installed and the box is thrown away. I sent a receipt for the overnight lugs from Simply breakers and asked for whatever credit they could provide. I received crickets to date. I have never had a problem with an order in the past from super breakers, but they are to busy to even respond to my request so I will think twice before I order anything from them again. It will be my last option once all others have been exhausted. Use Simply Breakers they have better stock and service.
PF
Paul F.
Verified Buyer
Reviewing
Siemens NGB3B060B - 60A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
6/24/26
Great service, quick shippin
Need I say more.I have used SB. When we need it and need it quickly Always have what I need.
BP
BJ P.
Verified Buyer
Reviewing
Siemens NGB3B020B - 20A 3 Pole Molded Case Circuit Breaker
I recommend this product
Rated 5 out of 5 stars
5/11/26
NGB3B020B
I recently purchased the NGB3B020B and I’m very satisfied with the quality and performance. The breaker feels solid and well-made, and installation was straightforward. It works exactly as expected and provides reliable protection for my electrical setup. Shipping was fast and the product arrived in excellent condition. I would definitely purchase from this seller again.
RS
Radovan S.
Verified Buyer
Reviewing
Siemens NGB3B050B - 50A 3 Pole Molded Case Circuit Breaker