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Siemens QR23B250L Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Siemens
QR23B250L
Molded Case Circuit Breaker
Brand
Siemens
SKU
QR23B250L
Quantity
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Siemens QR23B250L - 250A 3 Pole Molded Case Circuit Breaker
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250A 3 Pole Molded Case Circuit Breaker
250A 3 Pole Molded Case Circuit Breaker
250A 3 Pole Molded Case Circuit Breaker
Description
Part of the SENTRON family, the Siemens QR23B250L is a 3-pole, 250A MCCB built for commercial and industrial applications. It features a fixed thermal-magnetic trip unit for reliable long-time and instantaneous (LI) protection. This unit-mount breaker utilizes a feed-thru design for enclosures, switchboards, and control panels. It accepts 3 AWG to 300 kcmil wire via line and load lugs. Rated for 10kAIC at 240VAC, it includes a push-to-trip button and supports reverse feed applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QR23B250L |
| Series | QR |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | QR |
|---|---|
| Terminal Type | Lugs |
| For Use With | Enclosures, Switchboards, Control Panels (Cable-in/Cable-out) |
| Wire Gauge | 3 AWG - 300 kcmil (Al/Cu) |
| Max Wire | 300 kcmil |
| Min Wire | 3 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, Padlock Attachment, Handle Blocking Device, Mechanical Interlock, Mounting Screw Kit |
|---|---|
| Accessories | Line and Load Side Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Push-to-Trip Button, Non-Interchangeable Trip, Common Trip, 40C Ambient Calibration |
Product FAQs
7 answersWhat does the "L" at the end of the QR23B250L catalog number indicate?
The "L" suffix indicates that the breaker is supplied with both line and load side lugs installed. Standard QR breakers without this suffix typically include load side lugs only.
Can the Siemens QR23B250L be used to replace older QJ frame circuit breakers?
Yes, the Siemens QR series is the direct successor to the legacy QJ frame. The QR frame shares the same physical footprint but offers upgraded features like a push-to-trip button and support for field-installable internal accessories.
What wire sizes are compatible with the lugs on the QR23B250L?
The factory-installed line and load lugs accept aluminum or copper wire ranging from 3 AWG to 300 kcmil.
Does the QR23B250L support field-installable internal accessories?
Yes, unlike the older QJ frame, the QR series allows for field installation of internal accessories such as shunt trips and auxiliary switches without needing to order a custom factory build.
What is the standard ambient operating temperature for this breaker?
The QR23B250L is calibrated for standard operation at 40 degrees Celsius (104 degrees Fahrenheit). Operating the breaker in environments with higher ambient temperatures will require derating.
How is the QR23B250L mounted in a panel?
This is a unit-mount, feed-thru circuit breaker designed for cable-in and cable-out installations in compatible enclosures, switchboards, and control panels.
Does this breaker include a push-to-trip feature?
Yes, the QR23B250L features a built-in push-to-trip button on the faceplate, allowing you to manually test the mechanical tripping mechanism for safety and maintenance checks.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 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
1 review
- BGBob G.Verified BuyerReviewingSiemens QR23B125 - 125A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars7/7/26Perfect replacement
I had a load center with a broken main breaker handle. Ordered this one received it in two days and had it replaced in about 1/2 hour.