Square D ME36800LIG1021 Molded Case Circuit Breaker
- 800A
- 3 Pole
- I-Line
Quantity
Square D ME36800LIG1021 - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial and industrial facilities, this 800-amp molded case circuit breaker offers robust electronic trip capabilities. It installs into Square D I-Line panelboards and switchboards, utilizing a plug-on I-Line mounting style. For facilities upgrading their infrastructure, this legacy M-Frame unit is replaced by the PJA36080U64A. The breaker provides 65 kAIC interrupting capacity at 480VAC and features adjustable LIG protection alongside a 120-240VAC shunt trip mechanism.Specifications
| Brand | Square D |
|---|---|
| Series | ME |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600VAC |
| Amperage Range | 400-800A |
|---|
| Frame Type | ME |
|---|---|
| Terminal Type | Lugs |
| For Use With | Square D I-Line Panelboards and Switchboards |
| Wire Gauge | (3) 3/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| Trip Technology | Electronic Trip |
|---|---|
| Trip Function Code | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Adjustable |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included, Shunt Trip (Factory Installed) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | True RMS Sensing, 100% Rated, Extra High Interrupting Capacity |
Product FAQs
6 answersWhat does the 1021 suffix mean on the ME36800LIG1021?
The 1021 suffix indicates that this circuit breaker includes a factory-installed 120/240VAC shunt trip. This allows the breaker to be tripped remotely for emergency shutdowns or automated control systems.
Which panelboards are compatible with this 800A breaker?
This breaker features an I-Line mounting style, making it compatible with Square D I-Line panelboards and switchboards. It uses a plug-on phase connection and a screw-on bracket for secure installation.
What protection functions does the LIG electronic trip unit provide?
The LIG designation means the electronic trip unit includes adjustable Long-Time, Instantaneous, and Ground-Fault protection. This allows for precise system coordination and equipment protection against ground faults.
Does this breaker provide ground fault protection for personnel?
No. The ground fault protection on the LIG trip unit is designed for equipment protection, not for Class A personnel protection. It is intended to prevent damage to machinery and electrical infrastructure during a ground fault event.
Is the Square D ME frame still in active production?
The ME frame is a legacy molded case circuit breaker. For new installations or direct upgrades, Schneider Electric has replaced this series with the PowerPact M-Frame and P-Frame circuit breakers.
What wire sizes are accepted by the lugs on this breaker?
The factory lugs accept three conductors per phase, accommodating wire sizes from 3/0 AWG to 500 kcmil for both aluminum and copper wiring.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
- BWBrian W.Verified BuyerReviewingSquare D ME36800LI - 800A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/3/26Fast delivery!
Fast Delivery and great customer service!