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Siemens JXD23B300 Molded Case Circuit Breaker
- 300A
- 3 Pole
- Bolt-On
Siemens
JXD23B300
Molded Case Circuit Breaker
Brand
Siemens
SKU
JXD23B300
Quantity
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Siemens JXD23B300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens JXD23B300 - 300A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Series | JXD2 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 250VDC |
| Frame Type | JXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, P4 Panelboards, P5 Panelboards, SB Switchboards, Motor Control Centers |
| 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, Lug Kits, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Lugs Not Included (Requires TA2J6500) |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Quantity
Siemens JXD23B300 - 300A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | JXD2 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 250VDC |
| Frame Type | JXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, P4 Panelboards, P5 Panelboards, SB Switchboards, Motor Control Centers |
| 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, Lug Kits, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Lugs Not Included (Requires TA2J6500) |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
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Description
Delivering high-capacity protection, the JXD23B300 is a 300A molded case circuit breaker from the Siemens Sentron series. It safeguards commercial and industrial electrical systems against overloads. This JD frame breaker features a bolt-on mounting style, fitting into Siemens Sentron, P4, and P5 panelboards, as well as SB switchboards. It replaces the older JD63B300 model. Equipped with a thermal-magnetic trip unit, it provides a 65kAIC rating at 240VAC. Lugs are sold separately.Specifications
| Brand | Siemens |
|---|---|
| Series | JXD2 |
| Amperage | 300A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 250VDC |
| Frame Type | JXD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, P4 Panelboards, P5 Panelboards, SB Switchboards, Motor Control Centers |
| 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, Lug Kits, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Lugs Not Included (Requires TA2J6500) |
| Standards | CSA C22.2 No. 5, HACR Rated, IEC 60947-2, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards and switchboards are compatible with the JXD23B300?
The Siemens JXD23B300 is designed for bolt-on installation in Siemens Sentron Panelboards, P4 and P5 Panelboards, SB Switchboards, and Motor Control Centers.
How does the trip unit on the JXD23B300 operate?
The JXD23B300 utilizes a thermal-magnetic trip unit (LI). It provides a fixed thermal response for long-time overload protection and an adjustable magnetic response for instantaneous short-circuit protection, allowing you to fine-tune the trip threshold for your specific application.
What is the adjustable magnetic trip range for the JXD23B300?
The instantaneous magnetic trip on the JXD23B300 can be adjusted between 1250A and 2500A, providing flexibility for different inrush currents and short-circuit protection requirements.
Is the JXD23B300 a suitable replacement for older JD-frame breakers?
Yes, the JXD23B300 is a direct replacement for legacy Siemens and I-T-E 300A JD-frame breakers, including the JD63B300. It maintains the same bolt-on mounting style and physical dimensions for seamless integration into existing enclosures.
What wire sizes and materials are compatible with the JXD23B300?
This breaker accepts 3/0 AWG to 500 kcmil copper (Cu) or aluminum (Al) conductors. When installing, verify that the correct lug kit (such as the TA2J6500) is used and torqued to the manufacturer's specifications to ensure a secure connection.
What safety precautions should be taken before installing the JXD23B300?
Always ensure the power is completely disconnected and verified with a voltage tester before installing or servicing the breaker. Installation should only be performed by a qualified, licensed electrician in accordance with local electrical codes and NFPA 70E safety standards.
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