Built for commercial and industrial power systems, the Siemens NGB3B080B provides robust overcurrent protection. This 80A, 3-pole molded case circuit breaker features fixed thermal and magnetic trip elements for dependable long-time and instantaneous (LI) defense. It installs securely into Siemens P1, P2, and P3 panelboards via a standard bolt-on connection. Rated at 100 kAIC at 240VAC and 25 kAIC at 480Y/277VAC, it handles demanding fault currents. It is HACR rated and reverse feed capable.
Which panelboards are compatible with the NGB3B080B circuit breaker?
This bolt-on circuit breaker is designed exclusively for installation in Siemens P1, P2, and P3 series panelboards.
Do I need to buy load lugs separately for the NGB3B080B?
No, this breaker comes with factory-installed load lugs. They are rated to accept 8 AWG to 1/0 AWG copper wire, or 8 AWG to 2/0 AWG aluminum wire.
Can the NGB3B080B be used in reverse feed applications?
Yes. Because this thermal-magnetic breaker has a fixed, non-interchangeable trip unit and no line or load restrictions marked on the casing, it is suitable for reverse feed wiring.
Is this breaker rated for direct current (DC) applications?
Yes, in addition to standard AC voltages, the NGB3B080B is rated for 125/250VDC systems, making it suitable for select industrial or battery backup direct current circuits.
Are the thermal and magnetic trip settings adjustable?
No. This breaker features a fixed thermal and fixed magnetic (LI) trip unit, meaning the overload and short-circuit pickup levels cannot be modified in the field.
Does the NGB3B080B provide ground fault or arc fault protection?
No. This is a standard thermal-magnetic circuit breaker that provides essential long-time and instantaneous overcurrent protection. It does not include GFCI, AFCI, or equipment ground fault (EPD) functionality.
Do I need a separate strap kit to mount the NGB3B080B?
No. The NGB3B080B features a standard bolt-on connection that fastens directly to the bus inside Siemens P1, P2, and P3 panelboards without requiring additional mounting strap kits.
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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