Square D FHB16050C Molded Case Circuit Breaker
- 50A
- 1 Pole
- I-Line
Quantity
Square D FHB16050C - 50A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Designed to handle higher current loads, the Square D FHB16050C is a 1-pole, 50A molded case circuit breaker. It delivers dependable long-time and instantaneous trip protection for industrial and commercial power systems. This legacy F-frame breaker features a Phase C connection and installs into standard Square D I-Line panelboards. It is officially replaced by the PowerPact BGA140505. The unit provides a 25kAIC interrupt rating at 277VAC and includes AL100FA lugs for copper or aluminum wire.Specifications
| Brand | Square D |
|---|---|
| Series | FHB |
| Amperage | 50A |
| Poles | 1 |
| Mounting Style | I-Line |
| Voltage | 240VAC, 277VAC, 125VDC |
| Phase | 1 |
| AIC Rating | 25kA @ 240VAC, 25kA @ 277VAC, 10kA @ 125VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Square D I-Line Panelboards |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Phase C Jaw Configuration, Lugs (AL100FA) |
| Standards | HACR, UL 489, CSA C22.2 No. 5, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
Product FAQs
9 answersWhat type of panelboards accept the FHB16050C circuit breaker?
This breaker is designed exclusively for Square D I-Line panelboards and switchboards. It features a plug-on connector that grips the bus tightly during short circuits.
What does the "C" suffix in the FHB16050C part number indicate?
The "C" signifies that this 1-pole breaker is factory-configured with a specialized mounting jaw to connect specifically to the C-phase of the I-Line panelboard bus.
Can the FHB16050C be used in direct current (DC) systems?
Yes, this breaker is rated for DC applications up to 125VDC, providing an interrupting capacity of 10kAIC for those systems.
What are the acceptable wire sizes for the FHB16050C lugs?
The factory-installed mechanical lugs accept 14 to 1/0 AWG copper (Cu) wire, or 12 to 1/0 AWG aluminum (Al) wire.
Are the thermal and magnetic trip settings adjustable on this breaker?
No, the FHB16050C features a fixed thermal-magnetic trip unit. Both the long-time overload protection and instantaneous short-circuit protection are factory-set and cannot be adjusted in the field.
How does the FHB series differ from standard FA frame breakers?
The FHB series provides a higher interrupting capacity than standard FA frames. The FHB16050C delivers 25kAIC at 277VAC, making it suitable for commercial and industrial systems with higher available fault currents.
Is the Square D FHB16050C still manufactured?
The FHB series is a legacy F-Frame molded case circuit breaker that is no longer in active production. It is typically sourced to maintain or expand existing I-Line panels without requiring a complete system upgrade.
What is the current generation replacement for the FHB16050C?
When upgrading a legacy F-Frame I-Line breaker, engineers typically specify the Square D PowerPact B-Frame series. For a 50A 1-pole application, a model like the BGA140501 is the current generation equivalent, provided the phase connection matches your panel.
How does the thermal-magnetic mechanism in the FHB16050C operate during a fault?
The thermal trip unit uses a bimetal strip that bends in response to heat from prolonged overloads, while the magnetic trip instantly reacts to clear high-current short circuits, protecting the branch circuit wiring.
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