Siemens LMX3B800L Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Siemens LMX3B800L - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Providing a complete installation package, the Siemens LMX3B800L is an 800-amp, three-pole molded case circuit breaker. It is engineered to protect critical industrial circuits from overloads and short circuits. This model installs into Siemens VL Series panelboards and switchboards. It comes complete with 3TA3MG500 line and load lugs, accepting 1/0 AWG to 500 kcmil wire.Specifications
| Brand | Siemens |
|---|---|
| Series | LMX |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 50kA @ 600VAC |
| Frame Type | LMX |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens VL Series Enclosures, Panelboards, Switchboards |
| Wire Gauge | 1/0 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 AWG |
| 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 |
|---|---|
| Accessories | Line and Load Lugs Included (3TA3MG500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB-1, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
5 answersWhat panelboards and switchboards are compatible with the LMX3B800L?
This breaker is designed for use in Siemens Sentron panelboards, switchboards, and VL Series enclosures configured to accept LMD or LMX frame circuit breakers.
How does the LMX frame differ from the standard LMD frame?
The LMX frame provides a higher interrupting capacity for systems requiring up to 100kAIC at 480VAC, whereas the standard LMD frame is rated for 65kAIC at 480VAC. Both share the same physical footprint.
Are terminal lugs included with this breaker?
Yes, the LMX3B800L comes factory-equipped with mechanical lugs designed to accept 1/0 AWG to 500 kcmil aluminum or copper conductors.
Is the LMX3B800L suitable for direct current applications?
Yes, in addition to its AC ratings, this thermal-magnetic breaker is rated for use in DC systems up to 500VDC.
How is the instantaneous trip function configured on this model?
The breaker features a fixed thermal element for long-time overload protection and an adjustable magnetic dial on the front face to set the instantaneous short-circuit trip threshold.
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