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Siemens LMD63B500 Molded Case Circuit Breaker
- 500A
- 3 Pole
- Unit Mount
Siemens
LMD63B500
Molded Case Circuit Breaker
Brand
Siemens
SKU
LMD63B500
Quantity
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Siemens LMD63B500 - 500A 3 Pole Molded Case Circuit Breaker
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Description
The LMD63B500 is a 3-pole, 500A molded case circuit breaker from the Siemens Sentron family. Built for heavy-duty industrial applications, it delivers reliable overcurrent protection for high-capacity systems. This unit-mount breaker installs into Siemens P4 and P5 panelboards, as well as SB series switchboards. Rated at 50 kAIC at 480VAC, it features an interchangeable thermal-magnetic trip unit with adjustable instantaneous (LI) protection. It is HACR rated and includes line and load lugs.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LMD63B500 |
| Series | LMD6 |
| 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 |
| Frame Type | LMD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards (P4, P5), Switchboards (SB1, SB2, SB3) |
| Wire Gauge | (3) 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, Undervoltage Release, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Line and Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit |
Product FAQs
6 answersWhich Siemens panelboards and switchboards accept the LMD63B500?
This unit mount breaker is compatible with Siemens Sentron P4 and P5 panelboards, along with SB1, SB2, and SB3 switchboards.
How is the trip unit configured on the LMD63B500?
This breaker utilizes a thermal-magnetic trip unit with fixed thermal protection for overloads and an adjustable magnetic setting to fine-tune the instantaneous short-circuit response.
What wire sizes are supported by the standard lugs on this breaker?
The factory-installed lugs accommodate either copper or aluminum conductors ranging from 1/0 AWG to 500 kcmil.
Is the Siemens LMD63B500 suitable for direct current applications?
Yes, it is rated for use in DC systems up to 500VDC, where it provides a 25kA interrupting capacity.
How is the LMD63B500 installed in an electrical system?
It is a feed-thru, unit mount breaker. It bolts directly to the enclosure or mounting plate and requires wire connections at both the line and load terminals, rather than plugging into a busbar.
What type of protection does the LI trip function provide?
The LI designation indicates that the breaker delivers Long-Time protection for standard overloads and Instantaneous protection to quickly clear severe short circuits.
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