Eaton / Cutler-Hammer FPS3125 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Quantity
Eaton / Cutler-Hammer FPS3125 - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Engineered for commercial and industrial applications, the Eaton FPS3125 is a 3-pole definite purpose molded case circuit breaker. It is designed for use in HVAC equipment and specialized control panels requiring robust overcurrent protection. This unit mount breaker installs into Eaton PRL3a panelboards and serves as a reliable component for F-Frame systems. For modern upgrades, it is replaced by the FD3125 model.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | FPS3125 |
| Series | FPS |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 35kA @ 480VAC, 18kA @ 600VAC |
| Frame Type | FD |
|---|---|
| Terminal Type | Lugs |
| For Use With | Definite Purpose Control Panels, HVAC Equipment, Eaton PRL3a Panelboards |
| Wire Gauge | 4 AWG-4/0 AWG |
| Max Wire | 4/0 AWG |
| 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 | Load Side Lugs Included, Mounting Hardware |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Definite Purpose, HACR Rated |
Product FAQs
7 answersWhich panelboards accept the FPS3125 circuit breaker?
This unit mount breaker is designed for installation in Eaton PRL3a panelboards, as well as definite purpose control panels and HVAC equipment.
What frame type does the FPS3125 belong to?
It is an FP-frame breaker, which falls under the legacy Westinghouse F-Frame family of molded case circuit breakers.
What is the modern replacement for the legacy FPS3125?
The FPS3125 is a legacy definite purpose breaker. For modern upgrades or replacements, the Eaton FD3125 is the direct equivalent.
What wire gauge range do the terminals on the FPS3125 accommodate?
The standard lugs accept wire sizes from 4 AWG up to 4/0 AWG.
How is the FPS3125 installed into control panels?
It utilizes a bolt-on, unit mount configuration and includes the necessary base mounting hardware to secure it directly to the panel backpan.
Are the thermal and magnetic trip settings adjustable on this breaker?
No, the FPS3125 features a factory-sealed thermal-magnetic trip unit with fixed thermal (long-time) and fixed magnetic (instantaneous) settings.
Is the FPS3125 suitable for high fault current applications at 480V?
The breaker provides a 35kAIC interrupting rating at 480VAC. Electricians must verify the available fault current at the installation point to ensure it does not exceed this rating.
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