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Siemens CFD63B175L Molded Case Circuit Breaker
- 175A
- 3 Pole
- Unit Mount
Siemens
CFD63B175L
Molded Case Circuit Breaker
Brand
Siemens
SKU
CFD63B175L
Quantity
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Siemens CFD63B175L - 175A 3 Pole Molded Case Circuit Breaker
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Description
The CFD63B175L is a 175-amp, 3-pole molded case circuit breaker from Siemens' Sentron series. Built for commercial power distribution, it features a thermal-magnetic trip unit with fixed thermal and adjustable magnetic settings (LI). Engineered for unit mount installation, this FD frame breaker integrates into Siemens P2 and P3 panelboards and motor control centers. Rated for 200 kAIC at 480VAC, this current-limiting MCCB ensures robust fault interruption and is fully HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Part Number | CFD63B175L |
| Series | CFD6 |
| Amperage | 175A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 500VDC |
| Phase | 3 |
| AIC Rating | 200kA @ 240VAC, 200kA @ 480VAC, 100kA @ 600VAC, 50kA @ 500VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P2, P3 Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 6 AWG - 350 kcmil (Cu), 4 AWG - 350 kcmil (Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| 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, Motor Operator, Rotary Handle, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs |
| Standards | HACR Rated, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Current Limiting, HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
8 answersWhat types of enclosures or panels accept the CFD63B175L?
This unit-mount FD frame breaker is designed for installation in Siemens P2 and P3 panelboards, as well as compatible switchboards and motor control centers.
What does the L suffix in CFD63B175L indicate for installation?
The L indicates that the breaker is supplied with factory-installed line and load lugs. These lugs accept 6 AWG to 350 kcmil copper or 4 AWG to 350 kcmil aluminum conductors.
How does the C designation in the CFD6 frame affect its application?
The C designates this as a current-limiting breaker. It provides an exceptionally high interrupting capacity of 200kA at 480V, designed to clear faults rapidly and protect downstream equipment from extreme thermal and magnetic stress.
Can the trip settings on the CFD63B175L be adjusted in the field?
Yes, while the thermal long-time trip is fixed at 175A, the magnetic instantaneous trip is adjustable. This allows panel builders to tune the short-circuit response to coordinate with downstream devices or motor inrush currents.
Can I use the Siemens CFD63B175L to replace an older ITE breaker with the same catalog number?
Yes. Siemens acquired ITE and continued manufacturing the Sentron FD frame series under the same catalog numbers. The Siemens CFD63B175L is a direct, exact replacement for the legacy ITE CFD63B175L.
Is the CFD63B175L suitable for DC power systems?
Yes, this breaker is rated for DC systems up to 500 VDC with an interrupting capacity of 50kA. Ensure proper wiring configurations, such as series wiring of poles, as required by Siemens guidelines for DC voltages.
What does unit mount mean for the CFD63B175L?
Unit mount means the breaker bolts directly to the chassis or mounting pan of switchboards and control panels using mounting hardware, rather than plugging directly onto a panelboard busbar.
What safety advantage does the current-limiting feature provide?
By interrupting high-level fault currents within the first half-cycle, it significantly reduces the let-through energy and peak let-through current. This minimizes potential arc flash hazards and mechanical damage to the electrical system.
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