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Siemens / ITE FJ3B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens / ITE
FJ3B070
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
FJ3B070
Quantity
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Siemens / ITE FJ3B070 - 70A 3 Pole Molded Case Circuit Breaker
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Description
Part of the legacy F-frame series, the Siemens FJ3B070 is a 3-pole, 70A MCCB designed for commercial applications. It delivers reliable protection for older electrical systems. This unit mounts into Siemens and ITE F1, F2, SB1, SB2, and SB3 panelboards. It acts as an exact substitute for the FXD63B070, eliminating the need for aftermarket mounting kits. Featuring a non-interchangeable trip unit, it provides 14 kAIC interrupting capacity at 480VAC and includes reverse feed capabilities.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | FJ3B070-R |
| Series | FJ |
| Amperage | 70A |
| 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 |
|---|---|
| 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
7 answersWhich panelboards are compatible with the Siemens FJ3B070 circuit breaker?
This legacy F-frame breaker is designed to mount directly into Siemens and ITE F1, F2, SB1, SB2, and SB3 panelboards and switchboards.
Does the FJ3B070 support reverse feeding?
Yes, this breaker includes reverse feed capabilities, allowing for flexible installation configurations within compatible panelboards and switchboards.
Are the trip settings on the FJ3B070 adjustable?
No, this breaker features a non-interchangeable trip unit with fixed thermal and fixed magnetic settings for both long-time and instantaneous (LI) protection.
Is the FJ3B070 still actively manufactured by Siemens?
The FJ3B070 is part of the legacy ITE F-frame series and is considered a legacy MCCB. While no longer in active production, it remains a direct, drop-in replacement for older enclosures without requiring aftermarket mounting kits.
Can the FJ3B070 be used as a substitute for the FXD63B070?
Yes, the FJ3B070 can act as an exact substitute for the FXD63B070. Using this legacy F-frame breaker in older Siemens and ITE enclosures eliminates the need for the aftermarket mounting kits that are often required when retrofitting newer breaker frames.
Can I install a different brand of breaker in my Siemens or ITE panelboard?
No. Using unapproved or cross-brand breakers can compromise the integrity of the electrical system, lead to poor contact points, and void UL listings. Always use breakers specifically tested and listed for your exact Siemens or ITE enclosure.
Can the trip unit be removed or replaced on the FJ3B070?
No. The FJ3B070 features a non-interchangeable trip unit. Attempting to remove or replace the trip unit will void the UL listing and compromise the safety of the breaker.
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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.