Square D PEF36800LS Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Square D PEF36800LS - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
The PEF36800LS is a 3-pole, 800A molded case circuit breaker from Square D's legacy P-frame series. It delivers reliable protection for industrial applications. This unit-mount breaker installs into Square D QED switchboards. It serves as a direct replacement in existing systems, having been superseded by the PLL36080U33A which requires a retrofit kit. Equipped with a Micrologic electronic trip unit, it provides adjustable long-time and short-time (LS) protection and a 100 kAIC rating at 480VAC.Specifications
| Brand | Square D |
|---|---|
| Part Number | PEF36800LS |
| Series | PE |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 125kA @ 240VAC, 100kA @ 480VAC, 65kA @ 600VAC |
| Frame Type | PE |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D QED Switchboards |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LS |
| Trip Function | Long-Time, Short-Time |
| Trip Adjustability | Adjustable |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | 100% Rated, HACR Rated |
Product FAQs
7 answersWhat equipment is the PEF36800LS circuit breaker compatible with?
This unit-mount P-frame breaker is designed specifically for installation in Square D QED switchboards. It serves as a direct replacement for existing legacy systems.
What protection functions does the LS trip unit provide on the PEF36800LS?
The LS designation indicates a Micrologic electronic trip unit equipped with adjustable Long-Time and Short-Time protection. This allows panel builders to fine-tune the breaker response curve for precise system coordination.
Which mechanical lug kit is required for the PEF36800LS?
For standard 800A applications, this P-frame breaker uses the AL800M23K mechanical lug kit. These lugs accept three 3/0 AWG to 500 kcmil copper or aluminum conductors per phase.
Can I replace the PEF36800LS with a newer PowerPact P-frame breaker?
The PEF36800LS is a legacy Square D breaker that drops directly into older QED switchboards. Upgrading to a modern PowerPact P-frame equivalent typically requires a specialized retrofit kit to adapt the new breaker footprint to the existing bus structure.
Is the PEF36800LS an I-Line or unit-mount circuit breaker?
This specific model is a unit-mount, bolt-on circuit breaker. It fastens directly to the switchboard bus or mounting pan and is not compatible with I-Line plug-on panelboards.
How does the F-interrupting rating perform across different voltages?
The PEF36800LS delivers a high interrupting capacity of 125kA at 240V, 100kA at 480V, and 65kA at 600V. This makes it suitable for industrial facilities with high available fault currents.
Can the trip settings on the PEF36800LS be adjusted in the field?
Yes, the Micrologic electronic trip unit features adjustable dials for both the Long-Time and Short-Time pickup and delay settings. This allows electricians to customize the protection profile during installation.
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