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Siemens QJ23B090 Molded Case Circuit Breaker
- 90A
- 3 Pole
- Unit Mount
Siemens
QJ23B090
Molded Case Circuit Breaker
Brand
Siemens
SKU
QJ23B090
Quantity
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Siemens QJ23B090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens QJ23B090 - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QJ23B090 |
| Series | QJ |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | QJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Meter Centers, Panelboards, 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed |
Sold out
Quantity
Siemens QJ23B090 - 90A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QJ23B090-R |
| Series | QJ |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | QJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Meter Centers, Panelboards, 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed |
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Description
Engineered for commercial power distribution, the Siemens QJ23B090 is a 3-pole, 90A molded case circuit breaker from the SENTRON family. It provides robust overcurrent protection for demanding electrical systems. This unit mount MCCB installs into Siemens meter centers, panelboards, and switchboards. It accepts 6 AWG to 300 kcmil copper wire via standard lug terminals. Rated for 10kA at 240VAC, it features fixed thermal magnetic trip settings, is HACR rated, and supports reverse feed.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QJ23B090 |
| Series | QJ |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | QJ |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Meter Centers, Panelboards, 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
5 answersWhat is the modern replacement for the Siemens QJ23B090?
The QJ frame is a legacy design that has been superseded by the QR frame. The direct modern equivalent is the QR23B090. When upgrading an older panelboard from a QJ to a QR frame, a specific retrofit mounting kit may be required depending on the enclosure.
Which Siemens enclosures accept the QJ23B090?
This unit-mount breaker is compatible with Siemens meter centers, panelboards, and switchboards designed for QJ or QR frame breakers. It requires a bolt-on connection and cannot be used in standard plug-on load centers.
Are the lugs on the QJ23B090 rated for aluminum wire?
Yes, the factory-installed lugs are dual-rated for both copper and aluminum conductors. They accommodate 6 AWG to 300 kcmil copper wire, and 4 AWG to 300 kcmil aluminum wire. Ensure proper application of joint compound when terminating aluminum conductors.
Does the QJ23B090 allow for field-adjustable trip settings?
No. The thermal-magnetic trip unit features fixed long-time and fixed instantaneous trip functions. If your application requires adjustable coordination, a breaker with an electronic trip unit is required.
Can the QJ23B090 be installed in a 480V panel?
No. This breaker is strictly rated for a maximum of 240VAC. Installing it in a 480V or 277/480V system exceeds its voltage rating and creates a severe safety hazard.
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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.