Square D KI362251380 Molded Case Circuit Breaker
- 225A
- 3 Pole
- I-Line
Quantity
Square D KI362251380 - 225A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Delivering robust protection for commercial facilities, this 225A current-limiting MCCB is part of the legacy K-Frame lineup. The unit installs into Square D I-Line panelboards and switchboards. It serves as the predecessor to the modern JRA36225, maintaining the exact physical footprint. Rated for 200 kAIC at 480V, it restricts let-through energy to safeguard downstream devices. This model includes a factory-installed 120VAC shunt trip and a 1A/1B auxiliary switch for remote operation.Specifications
| Brand | Square D |
|---|---|
| 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 |
| Frame Type | KI |
|---|---|
| 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 | Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Auxiliary Switch (1A/1B), Shunt Trip (120VAC) |
| Standards | CSA C22.2 No. 5, HACR, NEMA AB 1, NFPA 70, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Visual Trip Indicator, High Interrupting Capacity |
| Special Features | Current Limiting | I-Line Mount |
Product FAQs
4 answersWhat panelboards are compatible with the KI362251380?
This I-Line style plug-in breaker is designed for use in Square D I-Line panelboards and switchboards, including HCM, HCP, and HCR-U models.
What does it mean that the KI362251380 is a current limiting breaker?
As a current limiting breaker, it is engineered to clear high-level short circuits rapidly. By interrupting faults up to 200kAIC at 480V, it significantly reduces the peak let-through current and thermal energy, protecting downstream electrical equipment from severe damage.
How is the trip unit adjusted on the KI362251380?
This breaker features a thermal magnetic trip unit with a fixed thermal element for overload protection and an adjustable magnetic element for instantaneous short circuit protection. The magnetic pickup is configured using the adjustment dial located on the front face of the trip unit.
What is the modern replacement for the legacy KI362251380 circuit breaker?
The legacy Square D K-frame breakers have been superseded by the PowerPact J-frame series. When replacing this unit, a PowerPact J-frame breaker with an I-Line connection and equivalent interrupting ratings, such as the JLA or JRA series, is typically required.
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