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Siemens / ITE KM3B225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Siemens / ITE
KM3B225
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
KM3B225
Quantity
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Siemens / ITE KM3B225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
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Description
Serving as a robust solution for industrial facilities, the 225-amp KM-frame breaker provides reliable long-time and instantaneous trip functions. This bolt-on unit mounts into legacy ITE panelboards and motor control centers. It serves as an exact fit for older infrastructure, avoiding the need to upgrade to the newer JXD63B225 model which requires an adapter kit. Featuring an interchangeable trip unit and a 42kAIC rating at 240V, it ensures high-capacity fault clearing.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | KM3B225-R |
| Series | KM |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 42kA @ 240VAC, 30kA @ 480VAC, 22kA @ 600VAC |
| Frame Type | K |
|---|---|
| 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
5 answersWhat equipment is the Siemens KM3B225 circuit breaker designed to fit?
This bolt-on breaker is designed for use in legacy ITE switchboards, panelboards, and motor control centers. It serves as a direct replacement for older infrastructure without requiring an adapter kit.
Is the KM3B225 an exact replacement for older ITE KM-frame breakers?
Yes, the Siemens KM3B225 is a direct replacement for legacy ITE KM-frame breakers of the same amperage and pole configuration. It allows you to maintain existing panelboards without upgrading to newer frame types like the JXD63B225, which would require an adapter kit.
What wire sizes are accepted by the lugs on the KM3B225?
The included lugs accept two aluminum or copper conductors ranging from 1 AWG to 500 kcmil. Ensure proper torque specifications are followed during installation to maintain a secure connection.
Does the KM3B225 feature an adjustable trip unit?
Yes, this breaker features a thermal-magnetic trip unit with fixed thermal protection and adjustable magnetic (instantaneous) trip settings. This allows you to adjust the short-circuit response for your specific application.
Can I install this breaker in a panelboard from a different manufacturer?
No. The KM3B225 is specifically designed and UL-listed for use in compatible Siemens and legacy ITE enclosures. Installing it in a panelboard from another brand violates safety codes and can create a fire hazard.
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