Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Siemens QJ23B125H Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Siemens
QJ23B125H
Molded Case Circuit Breaker
Brand
Siemens
SKU
QJ23B125H
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens QJ23B125H - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens QJ23B125H - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QJ23B125H |
| Series | QJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 42kA @ 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, High Interrupting Capacity |
Sold out
Quantity
Siemens QJ23B125H - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | QJ23B125H-R |
| Series | QJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 42kA @ 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, High Interrupting Capacity |
Similar Items
150A 3 Pole Molded Case Circuit Breaker
90A 3 Pole Molded Case Circuit Breaker
200A 3 Pole Molded Case Circuit Breaker
Description
Built to manage substantial fault currents, this 125-amp high-interrupting molded case breaker provides 42kAIC protection for 240VAC commercial networks. The thermal-magnetic trip unit ensures precise response to both sustained overloads and sudden short circuits. Installation is streamlined for Siemens P1, P2, and P3 panelboards, utilizing a dependable bolt-on configuration. It serves as an exact physical match for older enclosures before transitioning to the newer HQR23B125 series.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QJ23B125H |
| Series | QJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 42kA @ 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, High Interrupting Capacity |
Product FAQs
6 answersWhich panelboards are compatible with the Siemens QJ23B125H circuit breaker?
This bolt-on breaker is designed for installation in Siemens P1, P2, and P3 panelboards, as well as compatible Siemens switchboards.
What is the modern replacement for the QJ23B125H breaker?
The QJ frame has transitioned to the newer QR frame series. The direct replacement for this model is the HQR23B125, though a specific mounting kit may be required when retrofitting into older enclosures.
Which lug kit is compatible with the QJ23B125H?
This breaker uses the TA1Q300 lug terminal kit. It accepts 6 AWG to 300 kcmil copper or 4 AWG to 300 kcmil aluminum conductors.
Can the Siemens QJ23B125H be reverse fed?
Yes. Because it features a non-interchangeable thermal magnetic trip unit, this QJ frame breaker is suitable for reverse feed applications.
What does the H in the QJ23B125H catalog number signify?
The H indicates a high interrupting capacity. This model provides a 42kAIC rating at 240VAC, offering greater fault current protection than standard QJ frame breakers.
Is the trip unit on the QJ23B125H adjustable?
No. This breaker features a fixed thermal and fixed magnetic trip unit with standard long-time and instantaneous trip functions.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 10 reviews.
Search
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.