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Siemens FJ3B175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Siemens
FJ3B175
Molded Case Circuit Breaker
Brand
Siemens
SKU
FJ3B175
Quantity
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Siemens FJ3B175 - 175A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Description
Built for heavy-duty commercial and industrial applications, the 175A FJ-type circuit breaker provides reliable overcurrent and short-circuit protection. It operates on systems up to 600VAC or 250VDC, utilizing non-interchangeable thermal magnetic trip elements for precise long-time and instantaneous response. This 3-pole device mounts into classic Siemens and I-T-E panelboards, specifically FC, CDP, and SB series. When upgrading older infrastructure, it can be substituted with the FD63B175.Specifications
| Brand | Siemens |
|---|---|
| Part Number | FJ3B175 |
| Series | FJ |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 22kA @ 240VAC, 14kA @ 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 |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Lugs |
| Standards | UL 489, CSA C22.2 No. 5, NEMA AB-1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the FJ3B175 circuit breaker?
This breaker is designed to mount into classic Siemens and I-T-E panelboards, specifically the FC, CDP, and SB series.
Is there a modern replacement for the legacy FJ3B175 breaker?
Yes. When upgrading older infrastructure, the Siemens FD63B175 can be used as a direct substitute for the legacy FJ3B175.
Can the FJ3B175 be used in direct current applications?
Yes, this breaker is rated for use on DC systems up to 250VDC, providing an interrupting capacity of 10kAIC.
How does the FJ3B175 connect to the panelboard?
This breaker utilizes a bolt-on connection for the line side to mount directly to the panelboard bus, and it includes mechanical lugs on the load side for wire terminations.
What conductor materials and sizes are supported by the factory lugs?
The included load-side lugs are rated for both copper and aluminum (Cu/Al) conductors, accommodating wire sizes from 6 AWG up to 350 kcmil.
Are the trip settings on the FJ3B175 adjustable?
No. This breaker features a fixed, non-interchangeable thermal magnetic trip unit with factory-set 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.
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
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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.