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Siemens JXD63B300L Molded Case Circuit Breaker
- 300A
- 3 Pole
- Unit Mount
Siemens
JXD63B300L
Molded Case Circuit Breaker
Brand
Siemens
SKU
JXD63B300L
Quantity
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Siemens JXD63B300L - 300A 3 Pole Molded Case Circuit Breaker
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Description
Built for industrial power systems, the Siemens JXD63B300L is a 3-pole, 300A molded case circuit breaker. It utilizes a JD frame and provides thermal-magnetic protection with adjustable magnetic trip. This unit mount breaker fits Siemens Sentron P4, P5, S4, and S5 panelboards and switchboards. It can be replaced by the 3VA series. Rated 35kAIC at 480V, this breaker is reverse feed capable and includes line and load lugs for 3/0 AWG to 500 kcmil wire.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JXD63B300L |
| Series | JXD6 |
| 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 (P4, P5, S4, S5), Switchboards, Enclosures |
| Wire Gauge | 3/0 AWG - 500 kcmil (Cu/Al) |
| Max Wire | 500 kcmil |
| Min Wire | 3/0 AWG |
| 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 |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the Siemens JXD63B300L?
This breaker is designed for use in Siemens Sentron P4, P5, S4, and S5 panelboards, as well as compatible Siemens switchboards and enclosures.
Does the JXD63B300L come with lugs installed?
Yes, the L suffix in the catalog number indicates that line and load lugs are factory-installed. It includes TA2J6500 lugs that accept 3/0 AWG to 500 kcmil copper or aluminum wire.
Can the Siemens JXD63B300L be reverse fed?
Yes, Siemens JXD6 type molded case circuit breakers are UL Listed for reverse feed applications.
What is the difference between the JD63B300 and the JXD63B300L?
The JD63B300 features an interchangeable trip unit, while the JXD63B300L has a factory-sealed, non-interchangeable trip unit. The L suffix on the JXD63B300L also confirms that line and load lugs are included.
What does the LI trip function mean on this breaker?
The LI designation indicates that the thermal-magnetic trip unit provides Long-Time (fixed thermal) and Instantaneous (adjustable magnetic) overcurrent protection.
What type of mounting does the JXD63B300L require?
This is a unit-mount, feed-thru circuit breaker. It bolts directly to the mounting surface or enclosure backpan rather than plugging onto a panelboard busbar.
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