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Square D IF36050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- I-Line
Square D
IF36050
Molded Case Circuit Breaker
Brand
Square D
SKU
IF36050
Quantity
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Square D IF36050 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Built to handle severe fault conditions, this 50-amp, 3-phase MCCB delivers reliable long-time and instantaneous trip functions. It serves as a critical safety component in commercial and industrial power distribution networks. Designed exclusively for Square D I-Line panelboards, the breaker utilizes a secure plug-on mounting style. Facilities looking to update their infrastructure can use the HRA36050 as a designated substitute.Specifications
| Brand | Square D |
|---|---|
| Part Number | IF36050-R |
| Series | IF |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 100kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Common Trip, Trip-Free Mechanism |
| Special Features | Current Limiting |
Product FAQs
9 answersWhat type of panelboards accept the IF36050 circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features a plug-on mounting style that connects directly to the I-Line bus stack.
Can the IF36050 be installed in standard Square D NQ or NF panelboards?
No. NQ and NF panelboards require bolt-on or plug-on breakers like the QO, QOB, or EDB series. The IF36050 is an I-Line frame breaker and will only fit I-Line distribution panels and switchboards.
Can this breaker be used on a 208Y/120V system?
Yes. While it has a maximum voltage rating of 600VAC, it is fully compatible with lower voltage 3-phase AC systems, including 208Y/120V, 240V, and 480V networks.
How does the current limiting feature of the IF series benefit an electrical system?
As an I-Limiter breaker, it clears high-level short circuits within the first half-cycle of the fault. This rapid interruption drastically reduces peak let-through current and thermal energy, minimizing potential damage to downstream conductors and equipment.
Does the IF36050 require upstream fuses to achieve its 200kAIC rating at 480V?
No. The IF36050 is a standalone current limiting molded case circuit breaker. It achieves its 200kA interrupting capacity at 240VAC and 480VAC without the need for external current limiting fuses.
What are the wire size limits for the load-side lugs on this 50A breaker?
The factory lugs accommodate 14 AWG to 1/0 AWG copper conductors, or 12 AWG to 1/0 AWG aluminum conductors. Ensure proper torque specifications are followed during installation based on the wire gauge and material used.
How does the IF36050 connect to the line-side power?
It utilizes the Square D I-Line plug-on mounting system. The breaker connects directly to the panelboard bus stack, requiring no internal wiring or cables for the line-side connections.
What is the designated modern replacement for the IF36050?
The IF frame is a legacy series. Facilities looking to update their infrastructure can use the HRA36050 as a designated substitute. When crossing over to the newer PowerPact series, always verify that the available fault current at the panel does not exceed the interrupting rating of the replacement breaker.
What protection functions are provided by the LI trip unit?
The fixed thermal-magnetic trip unit provides Long-Time (L) protection for sustained overloads and Instantaneous (I) protection for immediate short-circuit clearing. Both thermal and magnetic trip points are fixed and non-adjustable on this 50A model.
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