Siemens HMXD63B800H Molded Case Circuit Breaker
- 800A
- 3 Pole
- Unit Mount
Quantity
Siemens HMXD63B800H - 800A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for continuous high-demand loads, the Siemens HMXD63B800H is a 100% rated, 3-pole molded case circuit breaker. Operating at 800A and up to 600VAC, this Sentron series component is ideal for commercial and industrial facilities. The MD frame breaker mounts into Siemens switchboards, panelboards, and motor control centers. It utilizes a standard unit mount configuration, though lugs are not included. Delivering 65kAIC at 480V, it features a non-interchangeable thermal-magnetic trip unit.Specifications
| Brand | Siemens |
|---|---|
| Series | HMXD6 |
| Amperage | 800A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 50kA @ 600VAC, 50kA @ 500VDC |
| Frame Type | HMD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Switchboards, Panelboards, Motor Control Centers |
| 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, Motor Operator, Rotary Handle, Lug Kits |
|---|---|
| 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 | HACR Rated, High Interrupting Capacity, Non-Interchangeable Trip, 100% Rated |
Product FAQs
8 answersWhat does the "H" suffix in the HMXD63B800H catalog number indicate?
The "H" suffix designates that this circuit breaker is 100 percent rated. It can carry its full 800A continuous current rating indefinitely without nuisance tripping, provided it is installed in an enclosure approved for 100 percent operation.
How does the HMXD6 series differ from the standard MXD6 series?
The HMXD6 is the high-interrupting version of the Sentron MD frame. While the standard MXD6 provides a 50kAIC rating at 480VAC, the HMXD63B800H is rated for 65kAIC at 480VAC and 50kAIC at 600VAC.
What is the adjustable magnetic trip range for the HMXD63B800H?
This thermal-magnetic breaker features a fixed thermal element and an adjustable instantaneous magnetic trip. The magnetic trip dial can be set between 4000A and 8000A.
Does the HMXD63B800H come with line and load lugs installed?
No. Siemens Sentron MXD6 and HMXD6 assembled breakers do not include lugs. Line and load lugs must be ordered separately. For a factory-installed lug option, the part number would require an "L" suffix.
What specific lugs are required for 100 percent rated applications with this MD frame breaker?
To maintain the 100 percent continuous rating, you must use 90-degree Celsius copper wire sized at the 75-degree Celsius ampacity, paired with approved copper lugs such as Siemens 3TA4P8500 or 3TA2N8750.
Is this circuit breaker suitable for reverse feeding?
Yes. Like most Siemens Sentron thermal-magnetic breakers, the HMXD63B800H can be reverse fed. You can wire the line and load connections in either direction without compromising the overcurrent protection capabilities.
Can I change the trip unit on this circuit breaker to a different amperage?
No. The HMXD6 catalog numbering indicates a complete breaker assembled with a non-interchangeable thermal-magnetic trip unit. If you require an interchangeable trip design, you must use the HMD6 frame and a separate trip unit.
Can I use the HMXD63B800H to replace an older ITE MD frame breaker?
Yes. Siemens acquired ITE and continued the Sentron MD frame design. This breaker will fit the same physical footprint and mounting arrangements as legacy ITE HMXD6 and MD6 frame breakers of the same amperage.
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