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Siemens FXD63B100 Molded Case Circuit Breaker

  • 100A
  • 3 Pole
  • Unit Mount
Siemens FXD63B100
Molded Case Circuit Breaker
Brand Siemens
SKU FXD63B100
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  • 100A
  • 3 Pole
  • Unit Mount

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Siemens FXD63B100 - 100A 3 Pole Molded Case Circuit Breaker

Siemens FXD63B100 - 100A 3 Pole Molded Case Circuit Breaker

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$1,095.00 In Stock

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Description

Built for commercial and industrial power distribution, the Siemens FXD63B100 delivers 100 amps of thermal-magnetic protection in a 3-pole configuration. This Sentron FD-frame breaker mounts into Siemens P1, P2, and P3 panelboards, along with compatible motor control centers. Offering a 35kAIC rating at 480VAC, it includes a trip-free mechanism and is UL listed for reverse feed. Note that this model requires the TA1FD350A lug kit for proper installation.

Specifications

Key specifications
Brand Siemens
Part Number FXD63B100
Series FXD6
Amperage 100A
Poles 3
Mounting Style Unit Mount
Voltage 240VAC, 480VAC, 600VAC, 250VDC, 500VDC
Phase 3
AIC Rating 65kA @ 240VAC, 35kA @ 480VAC, 22kA @ 600VAC, 30kA @ 250VDC, 18kA @ 500VDC
Fit and installation
Frame Type FXD
Terminal Type Lugs
For Use With Siemens P1, P2, P3 Panelboards, Sentron Switchboards, Motor Control Centers, Sentron Enclosures
Protection and operation
Trip Technology Thermal Magnetic
Trip Function Code LI
Trip Function Long-Time, Instantaneous
Trip Adjustability Fixed Thermal, Adjustable Magnetic
Standards and features
Available Options Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Motor Operator, Rotary Handle, Mechanical Interlock
Accessories Requires Lug Kit TA1FD350A
Standards CSA C22.2 No. 5, HACR Rated, IEC 60947-2, NEMA AB 1, UL 489
Approval CE, CSA, UL
Temp Rating 40C
Construction Features HACR Rated, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism

Product FAQs

6 answers
What is the difference between the Siemens FXD63B100 and the FD63B100?

The FXD63B100 is built with a non-interchangeable, factory-sealed trip unit. The FD63B100 features an interchangeable trip unit that can be swapped or upgraded if your system requirements change.

Which panelboards and distribution equipment are compatible with the FXD63B100?

This molded case circuit breaker is designed for installation in Siemens P1, P2, and P3 panelboards, as well as Sentron switchboards, motor control centers, and individual Sentron enclosures.

Is the FXD63B100 rated for direct current (DC) systems?

Yes, this breaker is rated for DC applications. It carries an interrupting rating of 30kAIC at 250VDC and 18kAIC at 500VDC.

Are higher interrupting rating alternatives available for this frame size?

Yes, if your system requires a higher fault current rating than the 35kAIC at 480VAC provided by this breaker, you can upgrade to the HFD63B100 (65kAIC at 480V) or the CFD63B100 (100kAIC at 480V). All of these share the same physical FD frame footprint.

How is the thermal-magnetic trip unit configured on this breaker?

The breaker provides standard LI (Long-Time and Instantaneous) trip functions. The thermal element for overload protection is fixed at 100 Amps, while the magnetic element for short-circuit protection is adjustable to suit specific system parameters.

What size wire can be used with standard lugs on the FXD63B100?

When equipped with standard TA1FD350A mechanical lugs, this FD-frame breaker accepts wire sizes from #6 AWG to 350 kcmil copper or #4 AWG to 350 kcmil aluminum.

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Reviews

2.0
Rated 2.0 out of 5 stars
Based on 1 review
Total 5 star reviews: 0 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 1 Total 1 star reviews: 0
Rating
Ratings
1 review
  • KC
    Kevin C.
    Verified Buyer
    I do not recommend this product
    Rated 2 out of 5 stars
    6/3/26
    FXD63B100

    Breaker shipped 5 days after I ordered it , we had a Friday delivery date sent after order and it was not received until Thursday the following week.

    Why does it take 5 full working days to pack and ship a breaker that was confirmed to be in stock. This delayed completion of a marina project