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Square D KAB36125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- I-Line
Square D
KAB36125
Molded Case Circuit Breaker
Brand
Square D
SKU
KAB36125
Quantity
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Square D KAB36125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Square D KAB36125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Square D |
|---|---|
| Part Number | KAB36125 |
| Series | KAB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | KA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
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Quantity
Square D KAB36125 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | KAB36125 |
| Series | KAB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | KA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
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Description
Engineered for heavy-duty use, the Square D KAB36125 is a 125A, 3-pole molded case circuit breaker with thermal-magnetic (LI) protection. Designed for Square D I-Line panelboards and switchboards, this legacy K-Frame unit features a secure bolt-on connection. For modern upgrades, it crosses over to the PowerPacT H-Frame series (HGA36125). With an interrupting capacity of 25kAIC at 480VAC, it handles demanding industrial loads and includes a Visi-Trip visual indicator.Specifications
| Brand | Square D |
|---|---|
| Part Number | KAB36125 |
| Series | KAB |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 25kA @ 480Y/277VAC, 25kA @ 480VAC, 22kA @ 600Y/347VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | KA |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards, 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Visual Trip Indicator, Non-Interchangeable Trip |
Product FAQs
5 answersWhat is the modern replacement for the legacy KAB36125 circuit breaker?
The KAB36125 is part of the legacy Square D K-Frame series. For modern upgrades or replacements, it crosses over to the Schneider Electric PowerPacT H-Frame series, specifically catalog number HGA36125, which maintains the 125A capacity and I-Line mounting style.
Which panelboards are compatible with the KAB36125?
This breaker is built with an I-Line style connection and is exclusively compatible with Square D I-Line panelboards, switchboards, and motor control centers. It will not fit in standard NQ, NF, or QO load centers.
How does the adjustable magnetic trip function benefit the KAB36125?
While the thermal overload protection is fixed, the adjustable magnetic trip allows installers to modify the instantaneous short-circuit response. This is particularly useful for coordinating with other breakers or preventing nuisance tripping from high inrush currents on motor loads.
How is the KAB36125 physically secured inside the panel?
The breaker utilizes the Square D I-Line mounting system. The line side features jaws that push onto the panelboard bus stack, while a retaining bracket is bolted to the panel interior to provide mechanical stability. The load side uses standard mechanical lugs for wire connections.
Is it safe to reverse feed the KAB36125 breaker?
Yes. Because this Square D thermal-magnetic breaker does not have dedicated Line and Load markings, it is suitable for reverse feeding applications. If used to backfeed an I-Line panel, it must be properly secured and labeled as a main breaker to comply with National Electrical Code (NEC) standards.
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