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Square D KI36225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- I-Line
Square D
KI36225
Molded Case Circuit Breaker
Brand
Square D
SKU
KI36225
Quantity
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Square D KI36225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Square D KI36225 - 225A 3 Pole Molded Case Circuit Breaker
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Quantity
| Brand | Square D |
|---|---|
| Part Number | KI36225-R |
| Series | KI |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| 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, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Visual Trip Indicator, High Interrupting Capacity |
Quantity
Square D KI36225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Square D |
|---|---|
| Part Number | KI36225-R |
| Series | KI |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| 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, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Visual Trip Indicator, High Interrupting Capacity |
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Description
Engineered for industrial environments, the Square D KI36225 is a 3-pole, 225A K-Frame molded case circuit breaker. It provides reliable thermal-magnetic protection for commercial distribution systems. This unit mounts into Square D I-Line panelboards and switchboards. For modern upgrades, this legacy breaker is replaced by the JRA36225. Featuring current-limiting capabilities, it boasts a 200kAIC rating at 480VAC and includes adjustable magnetic trip settings to fine-tune response.Specifications
| Brand | Square D |
|---|---|
| Part Number | KI36225-R |
| Series | KI |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards and Switchboards |
| 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, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Visual Trip Indicator, High Interrupting Capacity |
Product FAQs
6 answersWhich panelboards accept the KI36225 breaker?
This unit features an I-Line style plug-on connection and mounts exclusively into Square D I-Line power distribution panelboards and switchboards.
Can the trip curve on the KI36225 be adjusted in the field?
Yes. While the thermal overload protection is fixed at 225A, the magnetic instantaneous trip function is adjustable, allowing electricians to dial in the short-circuit response based on specific load requirements.
The KI36225 is a legacy K-Frame. What is the modern Square D replacement?
For panel upgrades or direct replacements, this legacy K-Frame is typically replaced by the Square D PowerPacT J-Frame. The direct modern equivalent is the JRA36225, which maintains the 225A capacity and the high 200kA at 480V interrupting rating.
What size wire can be used with the KI36225 standard lugs?
The factory-installed lugs on this breaker are rated for both aluminum and copper conductors, safely accommodating wire gauges from 4 AWG up to 350 kcmil.
What is the difference between Square D KA and KI circuit breakers?
Both are legacy K-Frame breakers, but the I in the KI prefix designates a current-limiting circuit breaker. The KI36225 is engineered to restrict peak let-through current during severe faults, offering a much higher interrupting capacity (200kA at 480V) than standard KA models.
Does the KI36225 require separate line-side cables to connect to the panel bus?
No. As an I-Line breaker, it utilizes a plug-on connection that engages directly with the panelboard busbars, requiring standard lug terminations only on the load side.
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