Siemens / ITE F3B050 Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE F3B050 - 50A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Serving as a vital replacement part for commercial facilities, the F3B050 is a 3-pole, 50A MCCB from the Siemens F-Frame family. It delivers robust thermal-magnetic protection to safeguard circuits against overcurrent events. This unit is specifically built to fit legacy ITE and Siemens E-Frame panelboards, allowing for seamless maintenance of older systems. When a modern upgrade is required, the ED63B050 serves as the replacement. It provides 25kAIC at 240VAC and includes line and load lugs.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | F3B050-R |
| Series | F3B |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | ITE / Siemens E-Frame Panelboards |
| Wire Gauge | 14-1/0 AWG (Cu/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, Alarm Switch |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards accept the F3B050 circuit breaker?
This F-frame breaker is designed for bolt-on installation in compatible legacy ITE and Siemens panelboards and switchboards.
What is a compatible alternative to the legacy F3B050?
The Siemens ET100-350 is an exact-fit alternative that provides the same 50A rating and installs directly into the same legacy panelboards.
Can the F3B050 replace older ITE circuit breakers?
Yes, the F3B050 is the direct successor to the legacy ITE ET4035 and can be used to replace it in existing panelboards.
Do I need to purchase separate lugs for the F3B050?
No, this breaker includes factory-installed lugs that are ready to accept copper or aluminum (Cu/Al) conductors ranging from 14 AWG to 1/0 AWG.
Is the F3B050 suitable for DC voltage applications?
Yes, in addition to standard AC commercial applications, this breaker is fully rated for DC systems up to 250VDC, making it versatile for specialized industrial equipment.
Are the trip settings on the F3B050 adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. Both the long-time (thermal) and instantaneous (magnetic) functions are factory-set and non-interchangeable.
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