Siemens CMD63B800L Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Siemens CMD63B800L - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for heavy-duty power distribution, the CMD63B800L is a 3-pole, 800A molded case circuit breaker from the Siemens Sentron MD Frame lineup. This model includes factory-installed TA3K500 line and load lugs, streamlining the installation process. It mounts into Siemens P4 and P5 panelboards, switchboards, and standalone enclosures.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CMD63B800L |
| Series | CMD6 |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 65kA @ 600VAC, 50kA @ 250VDC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron P4, P5 Panelboards, Switchboards, Enclosures |
| Wire Gauge | (3) 1/0 AWG - 500 kcmil (Cu/Al) |
| 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 | Includes Line & Load Lugs (TA3K500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, High Interrupting Capacity, HACR Rated, Non-Interchangeable Trip |
Product FAQs
8 answersWhich panelboards are compatible with the CMD63B800L circuit breaker?
This MD-frame breaker is designed for use in Siemens Sentron P4 and P5 panelboards, as well as compatible Siemens switchboards and enclosures.
What wire sizes do the standard lugs on the CMD63B800L accept?
The included lugs accept three 1/0 AWG to 500 kcmil copper or aluminum conductors per phase.
Is the trip unit on the CMD63B800L adjustable?
Yes, it features a thermal-magnetic trip unit with a fixed thermal setting and an adjustable magnetic setting to fine-tune short-circuit protection.
What is the difference between the CMD63B800L and standard MD6 or HMD6 breakers?
The CMD63B800L is the highest interrupting capacity version in the MD frame family, offering up to 100kAIC at 480VAC. Standard MD6 breakers offer 50kAIC at 480VAC, and HMD6 breakers offer 65kAIC at 480VAC.
Can the CMD63B800L be used in DC electrical systems?
Yes, this breaker is rated for DC applications up to 500VDC, providing 50kAIC at 250VDC and 25kAIC at 500VDC.
How is the CMD63B800L mounted?
It is a unit-mount circuit breaker, meaning it is bolted directly to the mounting surface or enclosure backpan rather than plugging into a busbar.
What does the LI trip function code indicate on this breaker?
The LI designation means the thermal-magnetic trip unit provides Long-Time overload protection and Instantaneous short-circuit protection.
Are accessories interchangeable between MD6, HMD6, and CMD6 breakers?
Yes, because they all share the Siemens Sentron MD frame, internal and external accessories like shunt trips, auxiliary switches, and rotary handle operators are fully interchangeable across the MD6, HMD6, and CMD6 lines.
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