Milbank UQFB-X1 Bolt-On Circui...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$703.79
Milbank UQFB-X1 Bolt-On 200 Amp Frame, 10,000 AIC and 22,000 AIC, Two-Pole ‑ Common Trip

Milbank UQFB-X1 Bolt-On Circuit Breaker 200 Amp F-Frame 10,000 AIC Two-Pole Common Trip

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Model: UQFB-100-X1

In Stock (leaves warehouse same day if ordered before 3pm ET)

$703.79
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Milbank UQFB-X1 Bolt-On Circuit Breaker 200 Amp F-Frame 10,000 AIC Two-Pole Common Trip

Professional Circuit Protection for Metering Applications

The Milbank UQFB-X1 bolt-on circuit breaker delivers reliable 200 amp circuit protection with 10,000 AIC interrupting capacity in a compact F-frame design. This two-pole common trip breaker features thermal magnetic trip technology and non-metallic construction, specifically designed for metering accessory applications with lug-to-lug connections and line side threaded tangs for secure installation.

Professional Features & Benefits

  • 200 Amp F-Frame Design: Provides robust circuit protection in a compact form factor suitable for metering applications and space-constrained installations.
  • 10,000 AIC Interrupting Capacity: Delivers reliable fault current interruption capability for enhanced electrical system safety and protection.
  • Thermal Magnetic Trip Technology: Combines thermal and magnetic protection mechanisms for precise overcurrent detection and reliable circuit interruption.
  • Two-Pole Common Trip Configuration: Ensures simultaneous disconnection of both poles for complete circuit isolation and enhanced safety.
  • Lug-to-Lug Connection System: Facilitates secure electrical connections with line side threaded tangs for professional installation.
  • UL Listed Certification: Meets rigorous safety and performance standards for reliable operation in commercial and industrial applications.
  • Non-Metallic Construction: Provides durability and corrosion resistance while maintaining electrical insulation properties.

Technical Specifications

  • Actuator: Lever
  • Application: Metering Accessory
  • Auxiliary Contacts: No Auxiliary Contacts
  • Brand Name: Milbank
  • Connection: Lug to Lug
  • Departent: Electrical
  • Frame: F-Frame
  • Frequency Rating: 60 Hertz
  • Interrupt Rating: 10,000 Ampere Interrupting Capacity
  • Number Of Poles: 2
  • Operating Temperature: 40 Degrees Celsius
  • Phase: 1 Phase
  • Product Family Code: MSCB
  • Product Height: 7.438 IN
  • Product Length: 3.281 IN
  • Product Material: Non Metallic
  • Product Type: Current Interrupting Device
  • Special Features: Line Side Threaded Tangs
  • Standard: UL Listed
  • Trip Type: Thermal Magnetic
  • Unspsc Number: 39121601
  • Voltage Rating: 240 Volts Alternating Current
  • Width: 3 IN

Professional Applications

  • Electrical Metering Systems
  • Commercial Service Panels
  • Industrial Distribution Equipment
  • Utility Metering Installations
  • Multi-Tenant Electrical Systems
  • Professional Electrical Contractors

Why Choose Milbank Quality?

Milbank circuit breakers deliver proven reliability with UL Listed certification and robust thermal magnetic protection technology. The compact F-frame design and non-metallic construction ensure long-term durability while the 10,000 AIC interrupting capacity provides dependable circuit protection for demanding electrical applications.

Manufacturer Resources

Product Specs

Actuator:
Lever
Application:
Metering Accessory
Auxiliary Contacts:
No Auxiliary Contacts
Brand Name:
Milbank
Connection:
Lug to Lug
Frame:
F-Frame
Frequency Rating:
60 Hertz
Interrupt Rating:
10,000 Ampere Interrupting Capacity
Number Of Poles:
2
Operating Temperature:
40 Degrees Celsius
Phase:
1 Phase
Product Family Code:
MSCB
Product Height:
7.438 IN
Product Length:
3.281 IN
Product Type:
Current Interrupting Device
Special Features:
Line Side Threaded Tangs
Standards:
UL Listed
Trip Type:
Thermal Magnetic
Unspsc Number:
39121601
Voltage Rating:
240 Volts Alternating Current
Product Material:
Non Metallic
Product Width:
3 IN
Department:
Electrical
Product Subgroup:
Electrical
Connection Type:
Lug To Lug
Number of Phases:
1
Product Details:
Current Interrupting Device
Frequency:
60 hertz

Milbank UQFB-100-X1 – Frequently Asked Questions

1) What amp ratings does the Milbank UQFB-X1 breaker come in?
The UQFB-X1 bolt-on breaker is ordered by amperage: 100A (UQFB-100-X1), 125A (UQFB-125-X1), 150A (UQFB-150-X1), and 200A (UQFB-200-X1). All four sit in the same 200 amp F-frame, so the physical footprint and mounting stay the same regardless of which trip rating you pick. Pick the amperage off the service or feeder size you are protecting, not off the frame size.
2) Will a Milbank UQFB-X1 breaker work on a 208V or 240V single phase service?
It is rated 240 volts AC, 60 hertz, single phase, two-pole with common trip. That covers standard 120/240V single phase residential and light commercial services, and it is fine on a 120/208V single phase leg of a three phase system since that is below the 240V rating. It is not a three phase device: two poles only, so do not use it to protect a 3-phase load.
3) Is 10,000 AIC enough for my service, or do I need the 22kAIC version?
This breaker is the 10,000 ampere interrupting capacity version. The available fault current at the point of installation decides it: if the utility's available fault current at the meter socket exceeds 10kAIC, you need the higher 22kAIC rating instead. Get the available fault current letter from the serving utility before you commit, because a breaker applied above its interrupting rating is a code violation, not just a performance issue.
4) How does the UQFB-X1 connect to the meter socket bus, and do I need lugs?
It is a lug-to-lug breaker with line side threaded tangs. The tangs bolt to the socket's line side connection, and both line and load sides terminate on lugs rather than plugging onto a panelboard stab. That means there is no bus stab to match, but it also means you are landing conductors on both ends, so plan your wire bending space accordingly.
5) Can I use the Milbank UQFB-X1 as a main breaker in a load center?
It is built as a metering accessory breaker, meant to mount in Milbank meter sockets and metering equipment as the service disconnect or main. It is a bolt-on, lug-to-lug device, not a panelboard plug-in, so it does not drop into a residential load center bus. If you are looking for a main breaker inside a distribution panel, you want the breaker the panel manufacturer lists for that enclosure.
6) I need to replace one breaker in a multi-tenant meter stack. Will the 150A match what is already installed?
If the existing breakers are Milbank UQFB-series bolt-on units, the four amperages (100, 125, 150, 200) all share the same 200 amp F-frame, lug-to-lug terminations and 3 inch width, so swapping one amperage for another within the family is a like-for-like fit. What you must match separately is the interrupting rating: these are the 10,000 AIC units, and mixing a 10kAIC breaker into a stack specified for 22kAIC is not an acceptable substitution.
7) Does a two-pole common trip breaker open both hot legs together?
Yes. Common trip means an overload or fault on either pole trips both poles simultaneously, so both ungrounded conductors are disconnected at once. That is what you need for a 240V two-wire load or a 120/240V service disconnect, and it is different from an independent-trip or handle-tied arrangement.
8) What trip mechanism does the UQFB-X1 use, and is it adjustable?
Thermal magnetic. The thermal element handles sustained overloads with an inverse time delay and the magnetic element responds instantly to short circuit current. The actuator is a lever handle, and there are no auxiliary contacts on this breaker, so if your job needs a breaker status signal back to a BMS or alarm panel, this is not the device for it.
9) Is the Milbank UQFB-X1 breaker UL Listed for use in a service entrance meter socket?
UL Listed, per the manufacturer's stated standard. It is applied as a metering accessory breaker in Milbank metering equipment. For a service entrance application, the assembly as a whole needs to carry the suitable-for-service-entrance marking, so verify the socket or pedestal you are installing it in is labeled for that use.
10) What is the temperature rating on this Milbank breaker for outdoor pedestal installs?
The stated operating temperature is 40 degrees Celsius (104 F), which is the standard ambient basis for the breaker's rating. In a sun-loaded outdoor pedestal or an enclosure that runs hotter than that, a thermal magnetic breaker will trip earlier than its nameplate current. The case is non-metallic, which helps with corrosion in damp and coastal locations.
How fast can I get the Milbank UQFB-100-X1 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Milbank UQFB-100-X1 come with a warranty?
Absolutely. The Milbank UQFB-100-X1 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Milbank UQFB-100-X1?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Milbank UQFB-100-X1 from ZenSupply?
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