Siemens / ITE CM3B600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE CM3B600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for industrial applications, the Siemens CM3B600 is a 600A, 3-pole current-limiting circuit breaker. It delivers robust thermal-magnetic protection for commercial facilities requiring high interrupting capacities. Designed to fit legacy Siemens switchboards and motor control centers, this bolt-on unit provides a seamless replacement solution. It is officially replaced by the CMD63B600 in modern systems. Delivering 100 kAIC at 480V, it utilizes integrated fuses to protect downstream gear.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | CM3B600 |
| Series | CM3B |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 65kA @ 600VAC |
| Frame Type | CM |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Switchboards, Motor Control Centers, Power Panelboards |
| Wire Gauge | (3) 1/0 AWG - 500 kcmil |
| Max Wire | 500 kcmil |
| Min Wire | 1/0 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, Amp-trap Current Limiters |
|---|---|
| Accessories | Load Side Lugs Included, Amp-trap Current Limiters |
| Standards | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Fused Protection, Interchangeable Trip Unit |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
5 answersWhat types of enclosures are compatible with the CM3B600?
This bolt-on circuit breaker is designed for use in legacy Siemens and ITE switchboards, motor control centers, and power panelboards.
What is the modern replacement for the legacy CM3B600 circuit breaker?
The CM3B600 is part of the legacy Cordon series. In modern systems, it is typically replaced by the Sentron series CMD63B600, though a retrofit kit or enclosure modifications may be required for integration.
What wire sizes do the standard lugs on the CM3B600 accept?
The terminal lugs are configured to accept three conductors per phase, accommodating wire sizes from 1/0 AWG to 500 kcmil.
How does the adjustable magnetic trip function operate on this breaker?
The CM3B600 features a fixed thermal and adjustable magnetic trip unit. This allows panel builders and electricians to manually set the instantaneous short-circuit pickup level to coordinate with downstream devices and prevent nuisance tripping.
How does the current-limiting design of the CM3B600 protect downstream equipment?
Current-limiting breakers are engineered to clear short circuits in a fraction of a cycle. This rapid response significantly reduces the peak let-through current and thermal energy, minimizing potential damage to downstream electrical gear during high-fault conditions.
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