Siemens / ITE CK3B225 Molded Case Circuit Breaker
- 225A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE CK3B225 - 225A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Engineered for industrial environments, the Siemens 225A, 3-pole current-limiting MCCB utilizes fixed thermal-magnetic trip technology. It features integrated Amp-Trap limiters to reduce let-through energy. This bolt-on C-frame breaker fits seamlessly into legacy ITE and Siemens panelboards. It replaces the CJ3B225 and serves as the predecessor to CFD63B225 models, ensuring exact compatibility. Rated 100kA at 480V, it delivers exceptional short-circuit protection.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | CK3B225-R |
| Series | CK |
| Amperage | 225A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 100kA @ 480VAC, 100kA @ 600VAC |
| 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
6 answersWhich panelboards accept the CK3B225 circuit breaker?
This C-frame breaker is engineered for installation in legacy Siemens and ITE panelboards and switchboards that accommodate bolt-on molded case circuit breakers.
What are the direct cross-reference replacements for the CK3B225?
The CK3B225 is an exact replacement for the legacy ITE CJ3B225. It also serves as the predecessor to the CFD63B225 model, allowing it to fit seamlessly into existing C-frame configurations.
What are the lug wire size requirements for this breaker?
The factory-installed load side lugs accommodate 4 AWG to 300 kcmil copper wire, or 2 AWG to 300 kcmil aluminum wire.
How does the current-limiting feature of the CK3B225 operate?
As a current-limiting breaker, it is designed to clear faults rapidly and reduce the peak let-through energy. This protects downstream electrical components from severe thermal and magnetic stress during a short circuit.
Can the thermal-magnetic trip settings be adjusted on the CK3B225?
No, this breaker utilizes a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous (LI) protection settings are factory calibrated and cannot be modified in the field.
How is the CK3B225 mounted into the enclosure?
This is a standard bolt-on breaker. It secures directly to the busbars of compatible Siemens or ITE switchboards and panelboards to ensure a reliable, high-capacity phase connection.
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