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Siemens JD63B300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Siemens
JD63B300
Molded Case Circuit Breaker
Brand
Siemens
SKU
JD63B300
Quantity
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Siemens JD63B300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens JD63B300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | JD63B300 |
| Series | JD6 |
| Amperage | 300A |
| 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, Switchboards, Motor Control Centers |
| Wire Gauge | (1-2) 3/0 AWG - 500 kcmil (Cu) or (1-2) 4/0 AWG - 500 kcmil (Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG (Cu), 4/0 AWG (Al) |
| 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, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs (TA2J6500) Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Quantity
Siemens JD63B300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | JD63B300 |
| Series | JD6 |
| Amperage | 300A |
| 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, Switchboards, Motor Control Centers |
| Wire Gauge | (1-2) 3/0 AWG - 500 kcmil (Cu) or (1-2) 4/0 AWG - 500 kcmil (Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG (Cu), 4/0 AWG (Al) |
| 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, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs (TA2J6500) Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
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Description
Built for heavy-duty commercial applications, the Siemens JD63B300 is a 300A, 3-pole molded case circuit breaker with an interchangeable thermal-magnetic trip unit for reliable LI protection. The JD6 frame breaker mounts into Siemens Sentron panelboards and switchboards. It comes standard with TA2J6500 lugs, accepting 3/0 AWG to 500 kcmil conductors. Offering a 65kAIC rating at 240VAC, this unit is replaced by the 3VA5330-5EC31-0AA0 (requires an adapter kit).Specifications
| Brand | Siemens |
|---|---|
| Part Number | JD63B300 |
| Series | JD6 |
| Amperage | 300A |
| 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, Switchboards, Motor Control Centers |
| Wire Gauge | (1-2) 3/0 AWG - 500 kcmil (Cu) or (1-2) 4/0 AWG - 500 kcmil (Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG (Cu), 4/0 AWG (Al) |
| 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, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs (TA2J6500) Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Interchangeable Trip Unit |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the JD63B300?
The JD63B300 mounts in Siemens Sentron panelboards, switchboards, and motor control centers. It is commonly installed in P-Series (such as P2 and P3) as well as S5 and F2 distribution power panels.
Can the JD63B300 be reverse fed?
Yes. Because the JD63B300 features a non-interchangeable (fixed) thermal-magnetic trip unit, it is UL listed for reverse feed applications.
Is the trip unit on the JD63B300 adjustable?
Yes, while the thermal (long-time) protection is fixed at 300 amps, the magnetic (instantaneous) trip setting is adjustable to allow for coordination with other devices in your electrical system.
What is the modern replacement for the JD63B300?
Siemens is transitioning legacy JD frame breakers to the newer 3VA series. The recommended replacement for the JD63B300 is the 3VA5330-5EC31-0AA0, though a separate adapter kit is required to match the original JD frame mounting footprint.
Can the JD63B300 be used in DC applications?
Yes, this breaker is rated for up to 500VDC with a 25kA interrupting capacity. When applying a 3-pole breaker on 500VDC systems, all three poles must typically be wired in series according to Siemens DC application guidelines.
Which lugs are included with the JD63B300?
This breaker typically comes standard with TA2J6500 line and load lugs. These lugs accept one or two 3/0 AWG to 500 kcmil copper conductors, or 4/0 AWG to 500 kcmil aluminum conductors.
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