Square D KAL361251021 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Quantity
Square D KAL361251021 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Square D KAL361251021 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | KAL361251021-R |
| Series | KAL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Quantity
Square D KAL361251021 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | KAL361251021-R |
| Series | KAL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Description
Built for heavy-duty applications, the KAL361251021 delivers 125 amps of protection within Square D's K-Frame architecture. This 3-pole unit-mount breaker is equipped with a factory-installed shunt trip for remote circuit interruption. It mounts seamlessly into compatible Square D motor control centers and enclosures. While succeeded by the PowerPacT HGL36125SA, it remains an essential exact-fit replacement for maintaining existing 600VAC infrastructure.Specifications
| Brand | Square D |
|---|---|
| Part Number | KAL361251021-R |
| Series | KAL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D Enclosures, Switchboards, Motor Control Centers |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
4 answersWhat does the 1021 suffix indicate on the KAL361251021 breaker?
The 1021 suffix designates a factory-installed 120VAC shunt trip. This internal accessory allows the circuit breaker to be tripped remotely when a 120V control signal is applied to the coil leads, making it ideal for emergency stop circuits or automated safety shutdowns.
What is the modern replacement for the legacy Square D KAL361251021?
The legacy K-frame series has been superseded by the PowerPact H-frame. The HJL36125SA is a modern equivalent that matches the 125A rating, 3-pole configuration, and includes a factory-installed 120V shunt trip (indicated by the SA suffix). Verify your required interrupting capacity before substituting.
Can I install the KAL361251021 in a Square D I-Line panelboard?
No. This is a unit-mount breaker with a feed-thru connection, meaning it uses wire lugs on both the line and load sides. It is intended for use in standard Square D enclosures, switchboards, or motor control centers. For an I-Line panelboard, you would need an I-Line plug-on breaker.
Are the trip settings adjustable on the KAL361251021?
The thermal (long-time) protection is fixed at 125 amps. However, the magnetic (instantaneous) trip function is adjustable, allowing electricians to fine-tune the short-circuit response to coordinate with downstream devices or handle motor inrush currents.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
- GGGavin G.ReviewingSquare D KAL36110 - 110A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/9/23Great service
Needed this breaker asap and they helped me get it quickly and they were very helpful.
- JJamesReviewingSquare D KAL36250 - 250A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/25/18Lightning Fast Turn Around
Thanks to SuperBreakers we were able to get the part we needed, and get back online.
- GRGreg R.ReviewingSquare D KAL26200 - 200A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars1/29/18Excellent Service
The breaker we ordered was needed to get one of or machines back up and running. We ordered it next day air and it arrived right on time.
Thank you,