Siemens / ITE F3B040 Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE F3B040 - 40A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Built for commercial applications, the F3B040 is a 3-pole, 40A molded case circuit breaker from the legacy Siemens F-Frame series. It provides essential long-time and instantaneous trip functions to protect electrical systems. This bolt-on MCCB installs into older ITE or Siemens E-Frame panelboards, making it an exact fit for aging infrastructure. For modern upgrades, it is replaced by the ED63B040. Rated 25kAIC at 240VAC, the breaker features a non-interchangeable trip unit and load lugs.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | F3B040-R |
| Series | F3B |
| Amperage | 40A |
| 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 | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
5 answersWhich panelboards are compatible with the F3B040 circuit breaker?
This bolt-on breaker is designed for installation in legacy ITE and Siemens panelboards. Always verify your specific enclosure and bus configuration can accept this breaker footprint before installation.
Can the F3B040 be used in direct current applications?
Yes, in addition to its standard AC ratings, this thermal-magnetic breaker is rated for use in DC systems up to 250VDC with a 10kA interrupting capacity.
Are the terminals on the F3B040 rated for aluminum wire?
Yes, the breaker is equipped with lugs that are dual-rated for both copper and aluminum conductors. The acceptable wire range is 14 AWG to 1/0 AWG.
Is the F3B040-R the same as the F3B040?
Yes, F3B040-R is an alternate catalog number for the standard F3B040 breaker. Both numbers refer to the exact same 40A, 3-pole circuit breaker.
What type of overload protection does the F3B040 provide?
It utilizes a thermal-magnetic trip unit with fixed long-time and instantaneous functions. This provides reliable protection against both gradual overloads and sudden short circuits.
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