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Siemens JD23B400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Bolt-On
Siemens
JD23B400
Molded Case Circuit Breaker
Brand
Siemens
SKU
JD23B400
Quantity
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Siemens JD23B400 - 400A 3 Pole Molded Case Circuit Breaker
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Description
Rated 65 kAIC at 240VAC, this 400A MCCB delivers reliable thermal-magnetic protection. The JD2 Series device features a fixed thermal and adjustable magnetic trip unit. Designed for bolt-on mounting, it installs into Siemens Sentron panelboards, switchboards, and motor control centers. This legacy J-frame breaker is replaced by the JD63B400 model. Standard features include an HACR rating and factory-installed lugs for dependable long-time and instantaneous (LI) protection.Specifications
| Brand | Siemens |
|---|---|
| Part Number | JD23B400-R |
| Series | JD2 |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 30kA @ 250VDC |
| Frame Type | JD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Sentron Panelboards, Switchboards, Motor Control Centers, Enclosures |
| Wire Gauge | (2) 3/0 AWG - 500 kcmil (Cu), (2) 4/0 AWG - 500 kcmil (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 | Lugs (TA2J6500) |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhat equipment is compatible with the JD23B400 circuit breaker?
This bolt-on MCCB is designed for installation in Siemens Sentron panelboards, switchboards, motor control centers, and compatible standalone enclosures.
What is the direct replacement for the legacy JD23B400?
The JD23B400 is a legacy J-frame breaker. It is directly replaced by the Siemens JD63B400, which shares the same physical dimensions but carries a higher 600V rating.
How does the adjustable magnetic trip function on this breaker?
The JD23B400 features a fixed thermal and adjustable magnetic trip unit. The adjustable magnetic setting allows electricians to tune the instantaneous trip threshold to coordinate with downstream devices or prevent nuisance tripping from motor inrush currents.
Which lug kit is used with the JD23B400?
This breaker typically uses the TA2J6500 lug kit. It accommodates two conductors per phase, accepting 3/0 AWG to 500 kcmil copper or aluminum wire.
Can the trip unit on the JD23B400 be swapped in the field?
No, this breaker is built with a non-interchangeable thermal-magnetic trip unit. The trip unit is factory-sealed and cannot be modified or replaced.
Is the JD23B400 HACR rated?
Yes, this breaker is HACR rated, meaning it is approved for use with heating, air conditioning, and refrigeration equipment that requires group motor protection.
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