Siemens / ITE F3B100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE F3B100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to keep older industrial panels operational, this 3-phase, 100-amp molded case breaker provides essential thermal-magnetic protection. The bolt-on configuration fits perfectly into classic Siemens and ITE E-Frame switchboards, bypassing the need for modern retrofits. Rated for 25kAIC at 240V and 14kAIC at 480V, it includes factory-installed line and load lugs. Facility managers often seek this specific F3B series unit before transitioning to the modern ED63B100 equivalent.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | F3B100-R |
| Series | F3B |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 14kA @ 480VAC, 10kA @ 600VAC, 10kA @ 250VDC |
| Frame Type | F |
|---|---|
| Terminal Type | Lugs |
| For Use With | ITE / Siemens E-Frame Panelboards |
| Wire Gauge | 4 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| 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 | 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
7 answersWhich panelboards are compatible with the F3B100 circuit breaker?
This bolt-on breaker is designed for use with classic Siemens and ITE E-Frame panelboards and switchboards.
Is there a modern replacement for the legacy F3B100 breaker?
Yes, the modern equivalent for this legacy F-Frame breaker is the Siemens ED63B100, which is often used when upgrading or transitioning from older E-Frame switchboards.
What wire sizes and materials are accepted by the lugs on this breaker?
The factory-installed line and load lugs accept copper or aluminum wiring ranging from 4 AWG up to 350 kcmil.
How does the interrupting capacity of the F3B100 vary by system voltage?
The breaker provides a maximum interrupting rating of 25kA at 240VAC, which scales down to 14kA at 480VAC, and 10kA for both 600VAC and 250VDC applications.
Can the F3B100 be used in DC applications?
Yes, this breaker is rated for use in DC systems up to 250VDC with an interrupting capacity of 10kA.
How is the F3B100 installed into the panelboard?
It utilizes a bolt-on mounting configuration to secure directly to the busbars of compatible E-Frame panelboards.
What type of trip mechanism does this breaker use?
It features a thermal magnetic trip unit with fixed long-time and instantaneous (LI) functions to protect against overloads and short circuits.
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