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Siemens / ITE CF3B050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Siemens / ITE
CF3B050
Molded Case Circuit Breaker
Brand
Siemens / ITE
SKU
CF3B050
Quantity
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Siemens / ITE CF3B050 - 50A 3 Pole Molded Case Circuit Breaker
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Description
Built for industrial applications, the Siemens CF3B050 is a 3-pole, 50A current-limiting molded case circuit breaker. It delivers robust thermal-magnetic protection with a 200kAIC rating at 480VAC. This bolt-on MCCB installs into Siemens switchboards and motor control centers. As a legacy C-Frame device, it serves as an exact replacement for older installations. It is officially replaced by the CED63B050 for modern upgrades. Integral Amp-Trap fuses provide superior short-circuit defense.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | CF3B050-R |
| Series | CF |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 100kA @ 600VAC, 100kA @ 250VDC |
| Frame Type | CF |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Switchboards, Motor Control Centers |
| Wire Gauge | 14-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 14 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 |
|---|---|
| Accessories | Amp-Trap Current Limiters, Line and Load Lugs Included |
| Standards | NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, Integral Amp-Trap Fuses, High Interrupting Capacity |
| Special Features | Current Limiting (Integrally Fused) |
Product FAQs
5 answersIs the CF3B050 considered an ITE or Siemens breaker?
Siemens acquired ITE, and this CF-frame breaker may be labeled under either brand. They are functionally identical, share the same CF3B050 catalog number, and are used in the same applications.
What type of equipment is the CF3B050 designed to fit?
This bolt-on CF-frame breaker is typically installed in Siemens or ITE commercial switchboards and motor control centers. It is a heavy-duty industrial breaker and is not designed for standard residential load centers.
Are the trip settings adjustable on this breaker?
No, the CF3B050 features a non-interchangeable thermal-magnetic trip unit. Both the long-time and instantaneous (LI) trip functions are fixed at the factory and cannot be adjusted in the field.
Does this breaker provide current-limiting protection?
Yes, the CF frame is a current-limiting molded case circuit breaker. It is engineered to clear severe faults rapidly, offering extremely high interrupting ratings (up to 200kA at 480V AC) to protect sensitive downstream equipment.
Are the terminal lugs included, and what wire sizes do they accept?
Yes, this breaker includes both line and load side lugs. The terminals are rated to accept 14 to 1/0 AWG copper wire or 12 to 1/0 AWG aluminum wire.
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