Siemens CLJ63B400 Molded Case Circuit Breaker
- 400A
- 3 Pole
- Unit Mount
Quantity
Siemens CLJ63B400 - 400A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy Sentron series, this 400A, 3-pole molded case circuit breaker delivers uncompromising current-limiting capabilities. It is engineered for complex commercial and industrial applications requiring high interrupt ratings up to 600VAC or 500VDC. The unit mounts into Siemens P3, P4, and P5 panelboards, offering a reliable replacement for aging infrastructure.Specifications
| Brand | Siemens |
|---|---|
| Series | CLJ |
| 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 Sentron Panelboards (P3, P4, P5), 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 |
|---|---|
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Non-Interchangeable Trip, HACR Rated |
Product FAQs
6 answersWhich Siemens panelboards are compatible with the CLJ63B400?
This breaker is designed to mount into Siemens Sentron P3, P4, and P5 panelboards, as well as compatible switchboards and motor control centers.
Are the lugs on the CLJ63B400 rated for both copper and aluminum wire?
Yes, the standard lugs are dual-rated for both copper (Cu) and aluminum (Al) conductors. They accommodate wire sizes from 3/0 AWG up to 500 kcmil.
How does the adjustable magnetic trip function work on the CLJ63B400?
While the thermal (long-time) trip is fixed at 400A, the magnetic (instantaneous) trip can be adjusted. This allows installers to tune the short-circuit response to coordinate with other protective devices in the system and prevent nuisance tripping.
Is the CLJ63B400 part of a current or legacy Siemens product line?
This unit is part of the legacy Siemens Sentron molded case circuit breaker family. It utilizes the C-Frame design and serves as a direct replacement for aging infrastructure in existing Sentron enclosures.
What does the 150kAIC rating at 480V indicate for this breaker?
The 150kAIC rating means this breaker can safely interrupt up to 150,000 amps of fault current at 480VAC without sustaining catastrophic damage. This high interrupting capacity makes it suitable for industrial environments with high available fault currents.
Does this breaker require a specific mounting hardware kit?
As a unit mount, bolt-on breaker, it typically requires a strap kit or specific mounting hardware depending on whether it is being installed in a panelboard, switchboard, or MCC enclosure. Verify the required kit for your specific Sentron enclosure.
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