Siemens / ITE CK3B175 Molded Case Circuit Breaker
- 175A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE CK3B175 - 175A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
A drop-in solution for aging infrastructure, the Siemens CK3B175 is a 175A, 3-pole current limiting breaker. It utilizes thermal-magnetic trip technology to protect commercial electrical systems up to 600VAC. Engineered for bolt-on installation, this C-frame unit mounts into legacy ITE and Siemens panelboards. It provides an exact physical match for older hardware and is replaced by the CFD63B175 series. Boasting a 100kAIC capacity at 480V, its Amp-Trap limiters minimize fault damage.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | CK3B175-R |
| Series | CK |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 100kA @ 600VAC |
| Frame Type | CK |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens/ITE Panelboards and Switchboards |
| Wire Gauge | 4 AWG - 300 kcmil (Cu), 2 AWG - 300 kcmil (Al) |
| Max Wire | 300 kcmil |
| Min Wire | 4 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | UL 489, NEMA AB-1, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting |
| Special Features | Current Limiting |
Product FAQs
5 answersWhat wire sizes are compatible with the load side lugs on the CK3B175?
The standard load side lugs accept 4 AWG to 300 kcmil copper conductors, or 2 AWG to 300 kcmil aluminum conductors.
Which panelboards are designed to accept this CK frame breaker?
This bolt-on breaker is built for legacy Siemens and ITE panelboards and switchboards that are configured for C-frame molded case circuit breakers.
Can the trip unit on this breaker be swapped out for a different rating?
Yes, the CK3B175 features an interchangeable thermal magnetic trip unit. This allows panel builders to change the trip rating by swapping the trip unit without replacing the entire breaker frame.
Are Siemens and ITE CK3B175 breakers interchangeable?
Yes. Siemens acquired ITE and continued manufacturing their molded case circuit breaker lines. An ITE branded CK3B175 is an exact physical and electrical match for a Siemens branded unit.
What does the current limiting designation mean for this specific breaker?
As a current limiting breaker, it clears high-level short circuits in less than half a cycle. This rapid response reduces peak let-through current, minimizing thermal and magnetic stress on downstream electrical components.
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