Siemens / ITE K3B175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE K3B175 - 175A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for commercial and industrial power distribution, the Siemens K3B175 is a 3-pole, 175-amp molded case circuit breaker. It provides essential thermal-magnetic protection for demanding electrical systems. This bolt-on unit mounts into Siemens P4 and P5 panelboards, as well as compatible switchboards. As a legacy K-Frame breaker, it serves as an exact replacement component, though it has been superseded by the JXD63B175.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | K3B175-R |
| Series | K3B |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 22kA @ 480VAC, 14kA @ 600VAC |
| Frame Type | K |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P4, P5 Panelboards, Switchboards |
| Wire Gauge | 4 AWG - 350 kcmil (Al/Cu) |
| Max Wire | 350 kcmil |
| Min Wire | 4 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, Lug Kits |
|---|---|
| Accessories | Lugs Not Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Interchangeable Trip Unit, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards accept the K3B175 breaker?
This bolt-on circuit breaker is designed to mount directly into Siemens P4 and P5 panelboards, as well as compatible Siemens switchboards used in commercial and industrial power distribution.
What is the direct replacement for the legacy K3B175 breaker?
The K3B175 is a legacy K-Frame breaker. While it serves as an exact replacement component for existing systems, it has been superseded by the Siemens JXD63B175 for new installations.
Can the trip unit on the K3B175 be modified or replaced?
Yes, this breaker features an interchangeable trip unit design. This allows panel builders to swap the trip unit if system requirements change without replacing the entire breaker frame.
Does the K3B175 include a trip-free mechanism?
Yes, it is built with a trip-free mechanism. This safety feature ensures the breaker will trip under fault conditions even if the operating handle is physically held or locked in the ON position.
How is the magnetic trip adjusted on the K3B175?
This breaker features a thermal-magnetic trip unit with a fixed thermal element and an adjustable magnetic element. This allows electricians to fine-tune the instantaneous short-circuit response to match specific load requirements.
Are the standard lugs on the K3B175 compatible with aluminum wiring?
Yes, the factory lugs are dual-rated for both aluminum and copper (Al/Cu) conductors. They accommodate wire sizes from 4 AWG up to 350 kcmil, providing flexibility for various installation requirements.
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