Siemens FJ2B100 Molded Case Circuit Breaker
- 100A
- 2 Pole
- Bolt-On
Quantity
Siemens FJ2B100 - 100A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Serving as a critical component for older electrical systems, this 100-amp molded case circuit breaker offers reliable thermal-magnetic protection. It meets the rigorous demands of commercial environments requiring continuous power. The bolt-on mounting style ensures a solid connection within legacy Siemens and I-T-E panelboards, such as the FC and CDP lines. Utilizing this specific F-frame model avoids the need for complex retrofits.Specifications
| Brand | Siemens |
|---|---|
| Part Number | FJ2B100 |
| Series | FJ |
| Amperage | 100A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 22kA @ 240VAC, 18kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens / I-T-E Panelboards (e.g., FC, CDP, SB) |
| Wire Gauge | 6 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Lugs |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
Product FAQs
6 answersWhat panelboards is the FJ2B100 compatible with?
It is designed for use in Siemens and I-T-E panelboards, specifically models like FC, CDP, and SB.
What wire sizes and materials are accepted by the lugs on this breaker?
The terminals accept 6 AWG to 350 kcmil wire and are rated for both copper (Cu) and aluminum (Al) conductors.
Is this an I-T-E or Siemens breaker?
Siemens acquired I-T-E, so this breaker may be branded as either Siemens or I-T-E depending on the manufacturing date. The FJ2B100 catalog number remains the exact same component regardless of the label.
Can this breaker be used in DC applications?
Yes, it carries a DC rating of 250VDC with an interrupting capacity of 10kA, making it suitable for specific direct current systems.
Does this breaker have adjustable trip settings?
No, the FJ2B100 features a fixed thermal and fixed magnetic trip unit, meaning the long-time and instantaneous trip functions cannot be adjusted in the field.
What is the interrupting capacity of this breaker at 240V?
While its primary rating is 18kAIC at 480VAC, it is rated to interrupt up to 22kAIC when used in 240VAC systems.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
- JMJoseph M.Verified BuyerReviewingSiemens / ITE FJ3S225 - 225A 3 Pole Molded Case SwitchI recommend this productRated 5 out of 5 stars3/20/26Siemens / ITE FJ3S225 - 225A 3 Pole Molded Case Switch
Correct item.
- BGBrad G.ReviewingSiemens / ITE FJ3B200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/19/21Great Service
We have had great luck with this company!! Great shipping and excellent customer service!
- CGClyde G.ReviewingSiemens FJ3B225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/8/18Had good results with your
Had good results with your people they was very helpful. Shipping was good and on time and products was right.