Free Shipping Over $99
Siemens LMXD63B800 Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Siemens
LMXD63B800
Molded Case Circuit Breaker
Brand
Siemens
SKU
LMXD63B800
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens LMXD63B800 - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens LMXD63B800 - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Series | LMXD6 |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | LMXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Enclosures |
| 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 | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, HACR Rated, Reverse Feed |
Quantity
Siemens LMXD63B800 - 800A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | LMXD6 |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | LMXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Enclosures |
| 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 | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, HACR Rated, Reverse Feed |
Similar Items
600A 3 Pole Molded Case Circuit Breaker
500A 3 Pole Molded Case Circuit Breaker
800A 3 Pole Molded Case Circuit Breaker
Description
Delivering robust overcurrent protection, the Siemens LMXD63B800 is an 800A, 3-pole molded case circuit breaker in the Sentron LMD frame family. Designed for unit mounting, it fits Siemens Sentron panelboards and switchboards. It replaces legacy LMD installations, while modern retrofits use the 3VA55 series. Featuring a 65kAIC rating at 240V, it utilizes a non-interchangeable thermal-magnetic trip unit. It offers fixed thermal and adjustable magnetic (LI) functions.Specifications
| Brand | Siemens |
|---|---|
| Series | LMXD6 |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | LMXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Enclosures |
| 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 | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, HACR Rated, Reverse Feed |
Product FAQs
9 answersAre terminal lugs included with the LMXD63B800 circuit breaker?
No, this breaker is supplied from the factory without lugs. You must select and purchase the correct lug kits separately depending on your specific wire material (copper or aluminum) and conductor size.
What equipment is the LMXD63B800 designed to fit?
This unit mount, bolt-on circuit breaker is compatible with Siemens Sentron series panelboards, switchboards, and enclosures, including P1, P2, P3, P4, and P5 distribution boards.
Can I adjust the trip settings on this Siemens 800A breaker?
Yes. The LMXD63B800 features a thermal-magnetic trip unit with a fixed thermal (long-time) setting and an adjustable magnetic (instantaneous) setting, allowing you to fine-tune your short-circuit protection.
Is the thermal-magnetic trip unit on this model interchangeable?
No, this breaker comes completely assembled from the factory with a non-interchangeable trip unit.
Does this circuit breaker support reverse feeding?
Yes, the LMXD63B800 is rated for reverse feed applications, meaning it can be safely wired with the incoming line power connected to either the top or bottom terminals.
Is the Siemens LMXD63B800 HACR rated?
Yes, this circuit breaker is HACR certified, meaning it is approved for safely protecting heating, air conditioning, and refrigeration equipment circuits.
What is the difference between the LMXD63B800 and the HLMXD63B800?
The LMXD63B800 has a standard interrupting capacity of 50kA at 480V AC. The HLMXD63B800 is the high-interrupting version, which provides a higher 65kA rating at 480V AC.
What are the physical dimensions of the LMXD63B800 frame?
The LMD frame measures 16 inches high, 7.5 inches wide, and 4.5 inches deep. Be sure to verify this footprint space in your switchboard or panelboard interior prior to mounting.
Does Siemens manufacture a modern replacement for LMD frame breakers?
Yes. While the LMXD63B800 serves as a direct drop-in replacement for legacy LMD installations, modern retrofits and new applications typically utilize the current Siemens 3VA55 series of molded case circuit breakers.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.