Square D LAF36350 Molded Case Circuit Breaker
- 350A
- 3 Pole
- Bolt-On
Square D
LAF36350
Molded Case Circuit Breaker
Brand
Square D
SKU
LAF36350
Quantity
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Square D LAF36350 - 350A 3 Pole Molded Case Circuit Breaker
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350A 3 Pole Molded Case Circuit Breaker
350A 3 Pole Molded Case Circuit Breaker
350A 3 Pole Molded Case Circuit Breaker
Description
Part of the legacy L-Frame series, the Square D LAF36350 is a 3-pole, 350A molded case circuit breaker built for commercial power distribution. It utilizes a thermal-magnetic trip unit with adjustable magnetic settings to handle demanding electrical loads. This bolt-on MCCB installs into Square D panelboards. Though replaced by the LGL36350, it remains a critical maintenance component. Rated for 42kAIC at 240VAC, it delivers dependable long-time and instantaneous fault clearing.Specifications
| Brand | Square D |
|---|---|
| Part Number | LAF36350 |
| Series | LAF |
| Amperage | 350A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | LAF |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D Panelboards and Switchboards |
| 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, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
5 answersWhat is the modern replacement for the LAF36350?
The LAF36350 is a legacy L-Frame breaker that has been replaced by the PowerPact L-Frame series, specifically the LGL36350. However, the LAF36350 remains available as a direct replacement for existing installations without requiring panel modifications.
What wire sizes do the standard lugs on the LAF36350 accept?
The factory lugs on this breaker accept one 1 AWG to 600 kcmil conductor or two 1 AWG to 250 kcmil conductors. They are rated for use with both aluminum and copper wire.
What frame size is the LAF36350?
The LAF36350 belongs to the Square D legacy L-Frame family. It is built on a 400A frame, though this specific model is factory-calibrated for a 350A continuous current rating.
How does the adjustable trip unit on the LAF36350 function?
The LAF36350 features a thermal-magnetic trip unit with a fixed thermal element for long-time overload protection. The magnetic element is adjustable, allowing you to set the instantaneous short-circuit trip threshold to match your specific load requirements.
Can I use the LAF36350 in an I-Line panelboard?
No. The LAF36350 is a standard bolt-on circuit breaker designed for traditional Square D panelboards and switchboards. It does not have the plug-on jaw connections required for I-Line panelboards.
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