Siemens LMX3B800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Siemens LMX3B800 - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for demanding commercial environments, the Siemens LMX3B800 delivers 800 amps of continuous current handling. This three-pole MCCB ensures safe operation across heavy-duty electrical networks. Designed for seamless integration, it mounts into Siemens VL Series panelboards and switchboards. The LMD frame construction offers a standardized fit for unit mount configurations. Lugs are not included.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LMX3B800 |
| 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 |
| 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 | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
5 answersAre terminal lugs included with the Siemens LMX3B800?
No, terminal lugs are not included with this circuit breaker. You must source the appropriate lug kits separately based on your specific wire gauge and conductor material requirements.
What equipment is the LMX3B800 designed to be installed in?
This unit mount breaker is compatible with Siemens VL Series enclosures, panelboards, and switchboards.
How does the LMX frame differ from the standard LMD frame?
The LMX frame offers a higher interrupting capacity than the standard LMD frame. The LMX3B800 delivers up to 100kAIC at 480VAC and 200kAIC at 240VAC for systems requiring higher fault current ratings.
How is the trip unit configured on the LMX3B800?
This breaker utilizes a thermal magnetic trip unit with a fixed thermal setting for long-time overload protection and an adjustable magnetic setting for instantaneous short-circuit protection.
Can the LMX3B800 be used to upgrade an existing LMD frame installation?
Yes. Because it belongs to the same LMD frame group, the LMX3B800 shares the same physical dimensions and mounting footprint as standard LMD breakers. This allows it to serve as a direct replacement when a higher interrupting rating is required.
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