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Siemens CJD63B400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Siemens
CJD63B400
Molded Case Circuit Breaker
Brand
Siemens
SKU
CJD63B400
Quantity
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Siemens CJD63B400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens CJD63B400 - 400A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Series | CJD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 150kA @ 480VAC, 100kA @ 600VAC, 50kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P4, P5 Panelboards, Switchboards, Enclosures |
| Wire Gauge | 3/0 AWG to 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 Kit (TA2J6500) |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, High Interrupting Capacity, Fuseless |
Quantity
Siemens CJD63B400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | CJD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 150kA @ 480VAC, 100kA @ 600VAC, 50kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P4, P5 Panelboards, Switchboards, Enclosures |
| Wire Gauge | 3/0 AWG to 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 Kit (TA2J6500) |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, High Interrupting Capacity, Fuseless |
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Description
Built for heavy-duty commercial power distribution, this 400A thermal-magnetic breaker provides essential long-time and instantaneous fault protection. The Sentron JD-frame construction ensures durability in rigorous industrial applications. This unit-mount MCCB fastens securely into Siemens P4 and P5 panelboards or standalone enclosures. It requires TA2J6500 lug kits for proper wire termination. Rated for 150kA at 480VAC, the current-limiting design restricts let-through energy during faults.Specifications
| Brand | Siemens |
|---|---|
| Series | CJD |
| Amperage | 400A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 150kA @ 480VAC, 100kA @ 600VAC, 50kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P4, P5 Panelboards, Switchboards, Enclosures |
| Wire Gauge | 3/0 AWG to 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 Kit (TA2J6500) |
|---|---|
| Accessories | Lugs Not Included |
| Standards | CSA C22.2 No. 5, HACR, IEC 60947-2, UL 489 |
| Approval | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, High Interrupting Capacity, Fuseless |
Product FAQs
7 answersWhich panelboards and enclosures are compatible with the Siemens CJD63B400?
The CJD63B400 is designed for unit mounting in Siemens P4 and P5 panelboards, switchboards, and standalone enclosures. It requires bolt-on or unit-mount hardware for installation.
What does the C in the CJD63B400 catalog number indicate?
The C designates this as a current-limiting JD frame breaker. It provides ultra-high interrupting ratings and restricts let-through energy during a fault without the use of internal fuses.
What wire sizes are accepted by the lugs on the CJD63B400?
The standard mechanical lugs for this breaker accept copper or aluminum conductors ranging from 3/0 AWG to 500 kcmil.
How is the trip unit configured on the CJD63B400?
This breaker features a thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions. The thermal overload protection is fixed at 400 amps, while the instantaneous magnetic short-circuit trip is adjustable via a dial on the face of the breaker.
Can the CJD63B400 replace standard JD63B400 or HJD63B400 breakers?
Yes, the CJD63B400 shares the same physical JD frame dimensions and mounting footprint as the JD63B400 and HJD63B400. It can be used as a direct upgrade when a higher interrupting capacity or current-limiting protection is required.
Does the CJD63B400 require external fuses to achieve its high interrupting ratings?
No. The CJD63B400 features a fuseless current-limiting design, allowing it to achieve its maximum interrupting ratings and restrict let-through current entirely through its internal contact mechanism.
How should the CJD63B400 be wired for 500VDC applications?
The breaker is rated for 50kA at 500VDC. When applying this 3 pole breaker on ungrounded 500VDC systems, Siemens requires the power supply to be connected in a zig-zag or series configuration through all three poles to ensure proper arc interruption.
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