Siemens / ITE CL3B600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE CL3B600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Part of the legacy C-Frame family, the Siemens CL3B600 is a 600A, 3-pole molded case circuit breaker built for heavy-duty industrial power distribution. This bolt-on breaker installs into Siemens P4 panelboards, P5 panelboards, and switchboards. As a discontinued model, it serves as an exact drop-in replacement, though it is officially replaced by the CLD63B600. Equipped with Amp-Trap current limiters, it achieves 100kAIC at 480V to minimize damage during severe fault conditions.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | CL3B600-R |
| Series | CL |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 100kA @ 600VAC, 100kA @ 250VDC |
| Frame Type | CL |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4 Panelboards, Siemens P5 Panelboards, Siemens Switchboards |
| Wire Gauge | 2 cables 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | UL 489, NEMA AB-1 |
| Approval | UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fused (Amp-Trap), Interchangeable Trip Unit |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
6 answersIs the Siemens CL3B600 still in active production?
The CL3B600 is a discontinued legacy C-Frame breaker. The official modern replacement is the Siemens CLD63B600, though the CL3B600 remains available as a direct drop-in replacement for existing installations.
How does the CL3B600 achieve its high interrupting rating?
As part of the Cordon series, this breaker utilizes integral Amp-Trap current limiters to achieve up to 200kA at 240VAC and 100kA at 480VAC. This current limiting design minimizes potential equipment damage during severe fault conditions.
What is the purpose of the adjustable magnetic trip on this breaker?
The adjustable magnetic trip allows electricians to tune the instantaneous trip threshold. This prevents nuisance tripping from harmless inrush currents when starting large motors or energizing transformers, while still providing immediate protection against short circuits.
Which panelboards are compatible with the CL3B600?
This bolt-on C-Frame breaker is designed for installation in Siemens P4 panelboards, Siemens P5 panelboards, and Siemens switchboards.
What wire sizes are accepted by the load side lugs?
The load side lugs accept two cables per phase, ranging from 3/0 AWG to 500 kcmil. The lugs are rated for both copper and aluminum conductors.
Are ITE and Siemens circuit breakers interchangeable?
Yes. Siemens acquired ITE, and many legacy ITE designs, including the CL frame, were continued under the Siemens brand. The CL3B600 may be labeled as either ITE or Siemens and is functionally identical.
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