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Siemens HJXD63B300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Bolt-On
Siemens
HJXD63B300
Molded Case Circuit Breaker
Brand
Siemens
SKU
HJXD63B300
Quantity
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Siemens HJXD63B300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Siemens HJXD63B300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | HJXD63B300 |
| Series | HJXD6 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards |
| 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, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, Non-Interchangeable Trip |
Quantity
Siemens HJXD63B300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | HJXD63B300-R |
| Series | HJXD6 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards |
| 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, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, Non-Interchangeable Trip |
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Description
Built for commercial and industrial applications, the Siemens HJXD63B300 is a 3-pole, 300A molded case circuit breaker from the Sentron series. It features a durable JD-frame construction and provides reliable thermal-magnetic protection with adjustable magnetic trip settings. This bolt-on MCCB is engineered to mount into Siemens P4 and P5 panelboards, as well as compatible switchboards. Lugs are not included. It delivers a high interrupting capacity of 65kAIC at 480V for demanding loads.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HJXD63B300-R |
| Series | HJXD6 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 25kA @ 500VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards |
| 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, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, Non-Interchangeable Trip |
Product FAQs
8 answersWhat panelboards are compatible with the Siemens HJXD63B300?
This JD-frame breaker is designed for installation in Siemens P4 and P5 panelboards, as well as compatible Siemens switchboards.
What does the H in the HJXD63B300 catalog number signify?
The H indicates a high-interrupting capacity. Compared to standard JXD6 breakers, this model offers increased short-circuit ratings, including 65kAIC at 480V and 35kAIC at 600V.
What does the X in the HJXD63B300 part number mean?
The X designates that this circuit breaker is built with a non-interchangeable trip unit.
Is the trip unit on the HJXD63B300 adjustable?
Yes. While the long-time thermal protection is fixed, the instantaneous magnetic trip function is adjustable to help coordinate with other downstream protection devices.
What lug kits are compatible with this JD-frame breaker?
This Sentron breaker accepts standard JD-frame lug kits, such as the TA2J6500 for dual-rated aluminum connections or the TC2J6500 for copper connections. Both kits typically accept wire sizes from 3/0 AWG to 500 kcmil.
Can the HJXD63B300 be used in DC voltage systems?
Yes, this thermal-magnetic breaker is UL rated for ungrounded DC systems up to 500VDC, providing a 25kAIC interrupting rating for those applications.
Is this Sentron circuit breaker suitable for reverse feed applications?
Yes, because it features a non-interchangeable trip unit, the HJXD6 series is UL listed for reverse feed installations.
What is the maximum frame rating for Sentron JD-frame breakers?
Although this specific breaker is factory-calibrated for 300A, the overall JD frame size supports continuous current ratings ranging from 200A up to a maximum of 400A.
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