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Siemens NXD63B900 Molded Case Circuit Breaker
- 900A
- 3 Pole
- Bolt-On
Siemens
NXD63B900
Molded Case Circuit Breaker
Brand
Siemens
SKU
NXD63B900
Quantity
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Siemens NXD63B900 - 900A 3 Pole Molded Case Circuit Breaker
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Description
Engineered for heavy-duty industrial applications, the Siemens NXD63B900 is a 900-amp, 3-pole molded case circuit breaker from the Sentron ND-Frame family. It delivers reliable long-time and instantaneous (LI) protection with a fixed thermal and adjustable magnetic trip unit. This bolt-on MCCB installs into Siemens P4 and P5 panelboards, switchboards, and motor control centers. The non-interchangeable trip design allows for reverse feeding. Rated at 65kAIC at 240VAC and 50kAIC at 480VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | NXD63B900 |
| Series | NXD6 |
| Amperage | 900A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 50kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P4 Panelboards, Siemens P5 Panelboards, Switchboards, 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, Mechanical Lugs, Compression Lugs |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
7 answersWhat equipment is the Siemens NXD63B900 circuit breaker compatible with?
The NXD63B900 is designed for use in Siemens P4 and P5 panelboards, switchboards, and motor control centers. It mounts using a standard bolt-on connection.
What is the adjustable magnetic trip range for the NXD63B900?
This breaker features a fixed thermal and adjustable magnetic trip unit. The magnetic trip setting can be adjusted from 5000A to 10000A.
Can the Siemens NXD63B900 be reverse fed?
Yes, the non-interchangeable thermal-magnetic trip design of the NXD63B900 allows it to be reverse fed for flexible installation in power distribution systems.
What are the alternate catalog numbers for the NXD63B900?
The NXD63B900 is frequently referenced by the alternate catalog number US2:NXD63B900. When ordered with factory-installed lugs, the catalog number is NXD63B900L.
What safety standards does the NXD63B900 comply with?
This 900A ND-frame breaker is UL 489 Listed, CSA C22.2 No. 5 certified, and complies with IEC 60947-2 standards for low-voltage switchgear. It is also HACR rated.
Can the NXD63B900 be used in DC applications?
Yes, the NXD63B900 is rated for up to 500VDC with an interrupting capacity of 25kA. It is suitable for ungrounded DC systems when wired according to manufacturer specifications.
Is the trip unit on the NXD63B900 interchangeable?
No, the NXD63B900 comes completely assembled with a factory-installed, non-interchangeable thermal-magnetic trip unit.
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