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Siemens LMXD63B500 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Unit Mount
Siemens
LMXD63B500
Molded Case Circuit Breaker
Brand
Siemens
SKU
LMXD63B500
Quantity
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Siemens LMXD63B500 - 500A 3 Pole Molded Case Circuit Breaker
Re-Certified
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Siemens LMXD63B500 - 500A 3 Pole Molded Case Circuit Breaker
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| Brand | Siemens |
|---|---|
| Series | LMXD6 |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| 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, Padlock Attachment, Mechanical Interlock |
|---|---|
| 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, Reverse Feed, Trip-Free Mechanism, HACR Rated |
Quantity
Siemens LMXD63B500 - 500A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | LMXD6 |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| 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, Padlock Attachment, Mechanical Interlock |
|---|---|
| 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, Reverse Feed, Trip-Free Mechanism, HACR Rated |
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Description
Belonging to the Sentron LMD frame family, the Siemens LMXD63B500 is a 3-pole, 500A molded case circuit breaker built for demanding industrial power distribution. Designed for unit mounting, it integrates into Siemens Sentron panelboards and switchboards. It ships without lugs and can be replaced by the 3VA55 series via retrofit. The breaker utilizes a non-interchangeable thermal-magnetic trip unit, delivering 50kAIC at 480VAC.Specifications
| Brand | Siemens |
|---|---|
| Series | LMXD6 |
| Amperage | 500A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| 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, Padlock Attachment, Mechanical Interlock |
|---|---|
| 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, Reverse Feed, Trip-Free Mechanism, HACR Rated |
Product FAQs
4 answersWhat replacement lugs are compatible with this LMD frame breaker?
For standard LMD frame breakers, Siemens TA3K500 mechanical lugs are commonly used. These lugs accept 1/0 AWG to 500 kcmil copper or aluminum wire and are suitable for line and load side connections.
What is the difference between the LMXD63B500 and the LMXD63B500L?
In Siemens catalog nomenclature, the base LMXD63B500 part number typically includes the frame, trip unit, and lugs packaged separately. The "L" suffix on the LMXD63B500L indicates that the lugs are factory-assembled onto the breaker before shipping.
How does the adjustable magnetic trip function operate on this breaker?
The thermal-magnetic trip unit features a fixed thermal element for continuous overload protection and an adjustable magnetic dial. This allows electricians to fine-tune the instantaneous short-circuit trip threshold to meet specific coordination study requirements.
What safety procedures are required before adjusting the magnetic trip settings?
Always verify the circuit breaker is completely de-energized and follow standard lockout, tagout (LOTO) procedures before making any adjustments to the trip dials. Only qualified personnel should modify these settings based on an approved coordination study.
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