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Siemens JXD23B400L Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Siemens
JXD23B400L
Molded Case Circuit Breaker
Brand
Siemens
SKU
JXD23B400L
Quantity
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Siemens JXD23B400L - 400A 3 Pole Molded Case Circuit Breaker
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Description
Designed for standalone enclosures and switchgear, the JXD23B400L is a unit-mount molded case breaker from the Siemens Sentron family. This 3-pole, 400A device includes factory-installed line and load lugs accepting up to 500 kcmil wire. It utilizes a non-interchangeable thermal-magnetic trip unit with adjustable instantaneous settings. Delivering a 65kA interrupting capacity at 240VAC, it replaces the discontinued JD63B400L model.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JXD23B400L |
| Series | JXD2 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 250VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, P4 Panelboards, P5 Panelboards, SB Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (2) 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, Rotary Handle, Motor Operator |
|---|---|
| Accessories | Line and Load Lugs |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip |
Product FAQs
7 answersWhich panelboards and switchboards are compatible with the Siemens JXD23B400L?
This breaker is designed for use in Siemens Sentron panelboards, P4 and P5 panelboards, SB switchboards, motor control centers, and standalone enclosures.
What wire sizes and materials do the lugs on the JXD23B400L accept?
The included lugs accept two 3/0 AWG to 500 kcmil copper or aluminum wires per phase.
What does the "L" at the end of the JXD23B400L catalog number indicate?
The "L" indicates that the breaker comes with factory-installed line and load lugs. Models without the "L" require lugs to be purchased and installed separately.
How does the trip unit on the JXD23B400L operate?
It features a non-interchangeable thermal-magnetic trip unit with a fixed thermal setting for overload protection and an adjustable magnetic setting for instantaneous short-circuit protection.
Is the JXD23B400L a plug-in or bolt-on breaker?
It is a unit-mount, feed-thru breaker, meaning it bolts or lugs directly into the distribution system rather than plugging into a busbar.
Can the JXD23B400L replace older JD frame breakers?
Yes, it is a direct replacement for legacy 400A, 240V JD frame breakers like the JD63B400L, fitting the same physical footprint in Siemens distribution equipment.
What is the difference between the JXD2 and JXD6 frames?
While both are part of the Siemens JD frame family, JXD2 breakers like the JXD23B400L are rated for a maximum of 240V AC, whereas JXD6 breakers are rated for up to 600V AC.
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