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Siemens JXD63B250 Molded Case Circuit Breaker
- 250A
- 3 Pole
- Unit Mount
Siemens
JXD63B250
Molded Case Circuit Breaker
Brand
Siemens
SKU
JXD63B250
Quantity
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Siemens JXD63B250 - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens JXD63B250 - 250A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | JXD63B250 |
| Series | JXD6 |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards (P4, P5, S4, S5), 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, Lug Kit |
|---|---|
| Accessories | Lugs Not Included |
| Standards | IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Quantity
Siemens JXD63B250 - 250A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | JXD63B250-R |
| Series | JXD6 |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards (P4, P5, S4, S5), 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, Lug Kit |
|---|---|
| Accessories | Lugs Not Included |
| Standards | IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
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Description
Serving as a critical component in commercial power distribution, this 250A thermal-magnetic breaker fits standard Siemens enclosures. The JXD63B250 offers an adjustable instantaneous trip function to help engineers meet specific coordination requirements. While this legacy Sentron model is eventually replaced by the 3VA series, it remains essential for maintaining existing infrastructure. It supports reverse feeding and requires separate lug kits for final installation.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JXD63B250 |
| Series | JXD6 |
| Amperage | 250A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 25kA @ 600VAC, 25kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens Sentron Panelboards (P4, P5, S4, S5), 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, Lug Kit |
|---|---|
| Accessories | Lugs Not Included |
| Standards | IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
7 answersIs the Siemens JXD63B250 suitable for reverse feed applications?
Yes. Because the JXD6 series features a factory-assembled, non-interchangeable trip unit, the JXD63B250 is UL Listed for reverse feed applications.
What is the adjustable magnetic trip range for this 250A breaker?
The instantaneous magnetic trip on the JXD63B250 can be adjusted from a low setting of 1250A up to a high setting of 2500A.
What wire size do the standard lugs accept for the JXD63B250?
When equipped with standard TA2J6500 lugs, the terminal wire range is 3/0 AWG to 500 kcmil for copper conductors, and 4/0 AWG to 500 kcmil for aluminum conductors.
What is the difference between the Siemens JXD63B250 and JD63B250 breakers?
The 'X' in the JXD63B250 catalog number indicates a factory-assembled, non-interchangeable trip unit. The standard JD63B250 features an interchangeable trip unit. The non-interchangeable design is required by UL 489 for reverse feed applications.
What standalone enclosures are compatible with the JXD63B250?
In addition to unit mounting in Sentron panelboards, this JD frame breaker can be installed in dedicated Siemens standalone enclosures, such as the NEMA 1 surface-mounted J6N1 enclosure.
Does the JXD63B250 circuit breaker carry an HACR rating?
Yes, this Sentron series molded case circuit breaker is HACR rated, making it suitable for use with compatible heating, air conditioning, and refrigeration equipment.
How should this 3-pole breaker be wired for 500VDC ungrounded systems?
When applied on 500VDC ungrounded systems, the power supply must be connected in a zig-zag configuration through the breaker. This ensures the voltage between phases on the breaker terminals is uniformly distributed.
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