Free Shipping Over $99
Siemens / ITE FJ2B125 Molded Case Circuit Breaker
- 125A
- 2 Pole
- Bolt-On
Siemens / ITE
FJ2B125
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
FJ2B125
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens / ITE FJ2B125 - 125A 2 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Similar Items
175A 2 Pole Molded Case Circuit Breaker
225A 2 Pole Molded Case Circuit Breaker
125A 3 Pole Molded Case Circuit Breaker
Description
Built for commercial environments, the 125A FJ-frame molded case circuit breaker delivers proven thermal-magnetic protection. This legacy component maintains existing electrical infrastructure. It installs into Siemens and ITE F1, F2, and SB-series panelboards. As an exact fit replacement, it avoids the special mounting kits required when substituting newer FXD62B125 models. Rated for 25kA fault currents at 240VAC, it features a non-interchangeable trip unit and standard load side lugs.Specifications
| Brand | Siemens / ITE |
|---|---|
| Series | FJ |
| Amperage | 125A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | FJ |
|---|---|
| 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 |
|---|---|
| Accessories | Load Side Lugs |
| Standards | UL 489, NEMA AB-1, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Reverse Feed |
Product FAQs
5 answersWhich panelboards and switchboards are compatible with the FJ2B125?
This legacy F-frame breaker is designed to install directly into Siemens and ITE F1, F2, SB1, SB2, and SB3 panelboards and switchboards.
Is the FJ2B125 still in active production?
No, the FJ2B125 is a legacy molded case circuit breaker. It is typically used as an exact-fit replacement in existing ITE and Siemens installations to avoid the need for special mounting kits required by newer models.
What is the modern replacement for the FJ2B125?
The modern equivalent is the Siemens FXD62B125. However, upgrading to the newer FXD model in older F1, F2, or SB-series panels typically requires a specialized branch mounting kit.
Can the FJ2B125 be used in DC voltage systems?
Yes, this thermal-magnetic breaker is rated for DC applications up to 250VDC, providing a 10kA interrupting capacity for industrial control or battery circuits.
Is the FJ2B125 suitable for reverse-feed applications?
Yes. Because it features a non-interchangeable thermal-magnetic trip unit without Line and Load terminal restrictions, it can be safely reverse fed.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
Total 5 star reviews: 3 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Search
Rating
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.