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Siemens NGB3B090B Molded Case Circuit Breaker

  • 90A
  • 3 Pole
  • Bolt-On
Siemens NGB3B090B
Molded Case Circuit Breaker
Brand Siemens
SKU NGB3B090B
Select Item Condition
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  • 90A
  • 3 Pole
  • Bolt-On

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Siemens NGB3B090B - 90A 3 Pole Molded Case Circuit Breaker

Siemens NGB3B090B - 90A 3 Pole Molded Case Circuit Breaker

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$429.24 In Stock

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Description

Providing reliable overcurrent defense for commercial facilities, the Siemens NGB3B090B is a 90-amp, 3-pole molded case circuit breaker. It employs fixed thermal and magnetic trip elements to deliver precise long-time and instantaneous (LI) fault clearing. This breaker installs easily into Siemens P1, P2, and P3 panelboards via a standard bolt-on connection. Capable of handling significant fault currents, it boasts a 100 kAIC rating at 240VAC. Load side lugs are included for quick wiring.

Specifications

Key specifications
Brand Siemens
Part Number NGB3B090B
Series NGB
Amperage 90A
Poles 3
Mounting Style Bolt-On
Voltage 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC
Phase 3
AIC Rating 100kA @ 240VAC, 25kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC
Fit and installation
Frame Type NGB
Terminal Type Lugs
For Use With Siemens P1, P2, P3 Panelboards
Wire Gauge 8-1/0 AWG (Cu), 8-2/0 AWG (Al)
Max Wire 1/0 AWG (Cu), 2/0 AWG (Al)
Min Wire 8 AWG
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Fixed Magnetic
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Alarm Switch
Accessories Load Side Lugs (3TC1GG20)
Standards CSA C22.2 No. 5, UL 489, NEMA AB 1
Approval CSA, HACR, UL
Temp Rating 40C
Construction Features HACR Rated, Reverse Feed

Product FAQs

5 answers
What panelboards are compatible with the Siemens NGB3B090B?

It is designed for use in Siemens P1, P2, and P3 panelboards. Depending on the panel type, specific mounting strap kits or barrier kits may be required to secure it to the bus.

Can the NGB3B090B be reverse fed?

Yes, this thermal-magnetic breaker is suitable for reverse feed applications.

Is the Siemens NGB3B090B HACR rated?

Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment.

What is the difference between the Siemens NGB, HGB, and LGB frame breakers?

The primary difference is their interrupting rating (AIC) at 480VAC. The standard NGB is rated for 25kAIC, the HGB is rated for 35kAIC, and the LGB is rated for 65kAIC at 480VAC.

Does the NGB3B090B come with lugs?

Yes, this breaker includes load-side lugs. The line side is designed to bolt directly to the panelboard bus.

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Reviews

4.5
Rated 4.5 out of 5 stars
Based on 8 reviews
Rating
Ratings
8 reviews
  • JH
    John H.
    Verified Buyer
    Reviewing
    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
    I recommend this product
    Rated 5 out of 5 stars
    3/9/26
    Absolutely amazing service.

    On Time