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Siemens / ITE KM3B600 Molded Case Circuit Breaker
- 600A
- 3 Pole
- Bolt-On
Siemens / ITE
KM3B600
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
KM3B600
Quantity
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Siemens / ITE KM3B600 - 600A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
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Description
Part of the legacy M-Frame family, the Siemens KM3B600 delivers 600A of thermal-magnetic protection for commercial facilities. It is designed to safeguard heavy-duty circuits against overloads and short circuits. This bolt-on breaker is an exact fit for older ITE switchboards and motor control centers. For modern upgrades, it crosses over to the LXD63B600, though a retrofit kit is necessary for integration. It provides a 42kAIC rating at 240VAC and includes an interchangeable trip unit.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | KM3B600-R |
| Series | KM |
| Amperage | 600A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Legacy ITE Switchboards and Panelboards, Motor Control Centers |
| Wire Gauge | (2) 1 AWG - 500 kcmil (Al/Cu) |
| Max Wire | 500 kcmil |
| Min Wire | 1 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 | UL 489, CSA C22.2 No. 5.1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit, Trip-Free Mechanism |
Product FAQs
6 answersWhat frame family does the KM3B600 belong to?
The KM3B600 is part of the legacy Siemens and ITE K-Frame family, specifically utilizing the KM frame design. It is commonly used in older motor control centers and switchboards.
Does the KM3B600 come with a trip unit installed?
Yes, this breaker comes complete with an interchangeable thermal-magnetic trip unit. The standard 600A trip unit for this model is the KM3T600, which provides long-time and instantaneous (LI) protection.
Can the Siemens KM3B600 replace older Gould or ITE branded breakers?
Yes, the Siemens KM3B600 is a direct replacement for older Gould and ITE versions of the KM3B600. They share the exact same physical dimensions, bolt-on mounting configuration, and electrical ratings.
What type of conductors can be used with the standard lugs on this breaker?
The standard load side lug terminals are dual-rated for both aluminum and copper conductors. They accept two wires per phase, ranging from 1 AWG to 500 kcmil.
What safety precautions are required when replacing the trip unit on the KM3B600?
Always de-energize all incoming power before opening the breaker enclosure or attempting to replace the trip unit. Only qualified personnel should perform maintenance to prevent severe injury or equipment damage.
Can this breaker be used in modern Siemens panelboards?
The KM3B600 is a legacy breaker designed primarily for older ITE switchboards, panelboards, and motor control centers. It may not fit in current-generation Siemens distribution equipment without specific retrofit hardware.
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