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Square D KIL36125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Square D
KIL36125
Molded Case Circuit Breaker
Brand
Square D
SKU
KIL36125
Quantity
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Square D KIL36125 - 125A 3 Pole Molded Case Circuit Breaker
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Description
Built for demanding industrial applications, the Square D KIL36125 provides 125A of thermal-magnetic protection with a massive 200kAIC interrupting capacity at 480V. This three-pole current-limiting MCCB restricts let-through fault currents to defend sensitive downstream components. It mounts into standard Square D enclosures and motor control centers via a feed-thru lug configuration. For modern upgrades, this legacy K-frame model crosses over to the newer JRL36125.Specifications
| Brand | Square D |
|---|---|
| Part Number | KIL36125 |
| Series | KIL |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480Y/277VAC, 200kA @ 480VAC, 100kA @ 600Y/347VAC, 100kA @ 600VAC |
| Frame Type | KIL |
|---|---|
| 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 | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Lugs (AL250KA) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated |
| Special Features | Current Limiting |
Product FAQs
7 answersWhat enclosures and panels is the Square D KIL36125 compatible with?
The KIL36125 is a unit-mount, feed-thru circuit breaker designed for use in standard Square D enclosures, switchboards, and motor control centers that accept legacy K-frame breakers.
Is there a modern replacement for the legacy KIL36125 circuit breaker?
Yes. For modern upgrades, this legacy K-frame model crosses over to the newer PowerPact J-frame series, specifically the JRL36125. The JRL36125 provides equivalent 125A, 3-pole, and high-interrupting capacity ratings.
What wire sizes and lug types are standard on the KIL36125?
This breaker comes equipped with AL250KA lugs on both the line and load sides. These lugs accept either aluminum or copper wire ranging from 4 AWG to 350 kcmil.
How does the current-limiting feature of the KIL36125 benefit my electrical system?
As a current-limiting molded case circuit breaker, the KIL36125 restricts let-through fault currents during a short circuit. This defends sensitive downstream components from thermal and magnetic stress, allowing the breaker to achieve a 200kAIC interrupting rating at 480V.
Are the trip settings on the KIL36125 adjustable?
The KIL36125 features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit protection.
How is the KIL36125 mounted inside a panel?
The KIL36125 is a unit-mount circuit breaker. It uses a feed-thru lug configuration and must be bolted or mounted directly to the enclosure backpan or mounting plate, rather than plugging onto a busbar.
Is the KIL36125 suitable for HVAC applications?
Yes, the KIL36125 is HACR rated, making it approved for use with heating, air conditioning, and refrigeration equipment.
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