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Siemens QJ23B070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
QJ23B070
Molded Case Circuit Breaker
Brand
Siemens
SKU
QJ23B070
Quantity
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Siemens QJ23B070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens QJ23B070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QJ23B070 |
| Series | QJ |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | QJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards (P1, P2, P3), Switchboards |
| Wire Gauge | 6 AWG - 300 kcmil (Cu), 4 AWG - 300 kcmil (Al) |
| Max Wire | 300 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included (TA1Q300) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Common Trip |
Sold out
Quantity
Siemens QJ23B070 - 70A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QJ23B070-R |
| Series | QJ |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | QJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards (P1, P2, P3), Switchboards |
| Wire Gauge | 6 AWG - 300 kcmil (Cu), 4 AWG - 300 kcmil (Al) |
| Max Wire | 300 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included (TA1Q300) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Common Trip |
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Description
Built for heavy-duty commercial environments, the Siemens QJ23B070 is a 3-pole, 70A molded case circuit breaker. It delivers consistent performance for industrial power distribution and facility management applications. This bolt-on MCCB is designed to mount into Siemens P1, P2, and P3 panelboards, as well as compatible switchboards. It includes load-side lugs for secure terminations. Operating with a 10kAIC rating at 240VAC, it features non-interchangeable thermal-magnetic LI trip functions.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QJ23B070 |
| Series | QJ |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | QJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Panelboards (P1, P2, P3), Switchboards |
| Wire Gauge | 6 AWG - 300 kcmil (Cu), 4 AWG - 300 kcmil (Al) |
| Max Wire | 300 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included (TA1Q300) |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Common Trip |
Product FAQs
6 answersWhich panelboards are compatible with the Siemens QJ23B070 circuit breaker?
The QJ23B070 is designed for bolt-on installation in Siemens P1, P2, and P3 panelboards, as well as compatible Siemens switchboards.
Is the Siemens QJ23B070 still manufactured, or is there a direct replacement?
The legacy QJ frame has been discontinued and replaced by the QR frame. The direct replacement for the QJ23B070 is the QR23B070, which shares the same form and fit for 240V applications.
What wire sizes are accepted by the lugs on the QJ23B070?
The load-side lugs on this breaker accept 6 AWG to 300 kcmil copper wire, or 4 AWG to 300 kcmil aluminum wire.
Can I field-install internal accessories on the QJ23B070?
No. Unlike the newer QR frame breakers which support field-installable internal accessories, auxiliary switches and shunt trips for the legacy QJ frame breakers were factory-installed.
What type of trip unit does the QJ23B070 use?
It features a non-interchangeable thermal magnetic trip unit with fixed long-time and instantaneous (LI) trip functions to protect against overloads and short circuits.
Is the QJ23B070 suitable for reverse feed applications?
Yes, this breaker supports reverse feed applications, allowing it to be back-fed when used as a main breaker in compatible Siemens panelboards.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 10 reviews.
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Rating
10 reviews
- WMWilliam M.Verified BuyerReviewingSiemens QJ23B125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/11/26Breaker
Perfect
- TNTimothy N.Verified BuyerReviewingSiemens QJ23B200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/27/2610% off
Arrived on time, worked when turned on
- WKWillie K.Verified BuyerReviewingSiemens QJ23B150 - 150A 3 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars7/22/26Breaker
The Breaker arrive fast and in good condition however when I looked at the specs it was not the correct one.
- PGPhil G.Verified BuyerReviewingSiemens QJ23B200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/3/26Great Service
I was in a bind for this breaker that was for an elevator, and Nick got me all the components even though their blizzard! Will use them for all my specialty breakers.
- VCVladimir C.Verified BuyerReviewingSiemens QJ22B200 - 200A 2 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars12/10/254 start
The breaker was it perfect match.,but it was missing the two top bolts.