Square D IKL34225-1021 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Unit Mount
Quantity
Square D IKL34225-1021 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy I-Limiter series, the Square D IKL34225-1021 is a 225A current-limiting MCCB for industrial environments. It restricts let-through energy to protect downstream equipment. This unit-mount breaker installs into Square D panelboards. As a legacy K-Frame component, it replaces older units and is superseded by the JRL36225. Rated for 200kAIC at 480VAC, it handles extreme faults. The -1021 suffix adds a factory-installed 120/240V shunt trip for remote tripping.Specifications
| Brand | Square D |
|---|---|
| Part Number | IKL34225-1021-R |
| Series | IKL |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D 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 | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, High Interrupting Capacity, HACR Rated |
| Special Features | Current Limiting |
Product FAQs
7 answersWhat is the modern replacement for the legacy IKL34225-1021 circuit breaker?
The IKL34225-1021 is a legacy K-Frame breaker. Square D officially replaces the base model with the PowerPact J-Frame series, specifically the JRL36225, for new installations. To match the -1021 functionality, a compatible J-Frame shunt trip accessory must be added. Upgrading to a J-Frame may also require different mounting hardware.
What does the -1021 suffix indicate on this Square D circuit breaker?
The -1021 suffix designates that the breaker includes a factory-installed 120-240VAC shunt trip accessory. This allows the breaker to be tripped remotely via a control signal, which is commonly used for emergency stops or automated safety shutdowns.
Can I install the IKL34225-1021 directly onto an I-Line panelboard bus?
No. This specific breaker features a unit-mount, feed-thru design with lug terminals on both the line and load sides. It is designed to be bolted to a backpan or enclosure rather than plugging directly onto an I-Line bus.
How does the current-limiting feature of the IKL34225-1021 benefit the electrical system?
As an I-Limiter breaker, it is engineered to rapidly clear severe electrical faults, minimizing the let-through energy. This reduces thermal and mechanical stress on downstream equipment, providing enhanced protection during high-fault conditions.
Are the trip settings adjustable on the IKL34225-1021?
This breaker 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. The magnetic trip can be tuned to coordinate with other devices in your system.
What size wire is compatible with the lugs on the IKL34225-1021?
The factory-installed lugs accept aluminum or copper conductors ranging from 4 AWG up to 350 kcmil. Ensure proper torque specifications are followed during installation as outlined by the manufacturer.
What safety function does the shunt trip provide on the IKL34225-1021?
The 120-240VAC shunt trip allows the breaker to be integrated into emergency stop circuits, fire alarm systems, or automated control panels. When a voltage signal is applied to the shunt trip coil, it mechanically forces the breaker to open, safely disconnecting power to the load.
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