NB90 - 90Amp Circuit Breaker

NB90 - 90Amp Circuit Breaker

The NB90 is a dependable 90 amp, 2-pole circuit breaker designed to work with 120/240V electrical systems. It’s a great replacement for older NB-style breakers and bolts right into place without a lot of hassle. This breaker uses a thermal magnetic trip, which means it can handle long-term load without issue but will trip fast when there’s a short or overload. It’s solid, straightforward, and built to do the job right. A lot of customers use this breaker in panel upgrades, subpanels, or when they’re replacing a breaker that’s aged out. If your setup calls for a 90A two-pole breaker with a bolt-on connection, this one fits the bill. It’s reliable, easy to work with, and designed to match the specs of the original NB frame.

Key Features and Benefits

• Direct Fit: Designed to replace older NB-style breakers without changes to your panel.
• Dual Protection: Helps prevent overheating from continuous load and reacts fast to sudden faults.
• Strong Interrupting Rating: Rated at 10,000 AIC at 120/240V to handle fault currents safely.
• Quick Install: Bolt-on design makes it easy to mount securely in the panel.
• Built to Last: Works well in demanding environments—residential, commercial, or light industrial.

Technical Specifications

• Model Number: NB90
• Amperage: 90 Amps
• Poles: 2
• Voltage: 120/240V AC
• Interrupting Capacity: 10kA
• Trip Type: Thermal Magnetic
• Mounting Style: Bolt-On
• Frame: NB
• Height: 4.25"
• Weight: Approx. 2 lbs

Safety & Material Standards

• Reliable Build: This breaker is made with quality components you can count on.
• Tested Performance: It meets key performance and safety expectations and has been tested to ensure consistent tripping and long-term durability.
• Straightforward Protection: You get reliable protection without overcomplicating things.

Where This Breaker Works Best

• The NB90 is a smart choice for subpanels, HVAC units, electric water heaters, and larger appliance loads that need solid overcurrent protection. It fits especially well in panels originally set up for NB-frame breakers, so it's a common pick when you're replacing or upgrading equipment in older systems.