Siemens / ITE FJ3B125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE FJ3B125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed as an exact fit for older infrastructure, this 125-amp F-frame molded case circuit breaker provides essential long-time and instantaneous trip functions. It installs into legacy Siemens and ITE F1, F2, SB1, SB2, and SB3 panelboards and switchboards without requiring aftermarket adapter kits. Rated for 14kAIC at 480VAC, the unit serves as a straightforward replacement for aging commercial systems, avoiding the complex retrofits associated with migrating to the newer FXD63B125 series.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | FJ3B125-R |
| Series | FJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens / ITE F1, F2, SB1, SB2, SB3 Panelboards and Switchboards |
| 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, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Lugs on load side only |
| Standards | UL 489, NEMA AB-1, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboards are compatible with the Siemens / ITE FJ3B125?
The FJ3B125 is designed to install directly into legacy Siemens and ITE F1, F2, SB1, SB2, and SB3 panelboards and switchboards.
Is the FJ3B125 a direct replacement for older ITE F-frame breakers?
Yes, this legacy F-frame breaker serves as an exact fit replacement for aging commercial systems. Using the FJ3B125 avoids the need for special mounting adapter kits that are typically required when migrating to the newer FXD63B125 series.
What type of conductors can be used with the FJ3B125 standard lugs?
The factory lugs are rated for both copper and aluminum conductors, accepting wire sizes from 6 AWG up to 350 kcmil.
Is the FJ3B125 suitable for DC circuit protection?
Yes, in addition to its AC ratings, this thermal magnetic breaker is rated for DC applications up to 250VDC with a 10kAIC interrupting capacity.
Are the trip settings adjustable on the FJ3B125?
No, this breaker features a non-interchangeable thermal magnetic trip unit with fixed long time and instantaneous trip functions.
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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.