Siemens FJ3B110 Molded Case Circuit Breaker
- 110A
- 3 Pole
- Bolt-On
Quantity
Siemens FJ3B110 - 110A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial applications, the Siemens FJ3B110 provides robust overcurrent protection in a 3-pole, 600VAC configuration. This legacy F-frame MCCB utilizes fixed thermal-magnetic trip technology for dependable long-time and instantaneous defense. It mounts securely into Siemens and I-T-E FC, CDP, and SB panelboards. For modern system upgrades, this exact unit is replaced by the FD63B110 model. Rated at 14kAIC at 480V, it accepts 6 AWG to 350 kcmil wiring via standard lug terminals.Specifications
| Brand | Siemens |
|---|---|
| Part Number | FJ3B110 |
| Series | FJ |
| Amperage | 110A |
| 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 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 answersIs the Siemens FJ3B110 still in active production?
The FJ3B110 is a legacy F-frame circuit breaker originally manufactured by I-T-E and Siemens. For modern system upgrades or direct replacements, the FD63B110 is the current equivalent model.
Which panelboards are compatible with this circuit breaker?
This breaker is designed to mount securely into legacy Siemens and I-T-E panelboards, specifically the FC, CDP, and SB series enclosures.
What wire sizes are accepted by the standard lugs on this breaker?
The factory lugs are designed to accept 6 AWG to 350 kcmil copper or aluminum wiring.
Can this breaker be used in DC voltage applications?
Yes, in addition to its AC ratings, this breaker is rated for up to 250VDC with an interrupting capacity of 10kA.
How does this breaker mount into the panelboard?
This is a bolt-on circuit breaker, requiring a bolted connection to the panelboard bus for secure and reliable power distribution.
Are the trip settings adjustable on the FJ3B110?
No, this breaker features a fixed thermal and fixed magnetic trip unit, meaning the long time and instantaneous trip functions cannot be adjusted in the field.
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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.