Siemens / ITE F3B020 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE F3B020 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Designed to support aging electrical infrastructure, this 20-amp molded case breaker provides essential long-time and instantaneous trip functions. The 3-pole unit accommodates 600VAC systems in commercial or industrial environments. It mounts into classic ITE and Siemens E-Frame panelboards without requiring modern adapters. While officially substituted by the ED63B020, utilizing this exact F-Frame model preserves original panel certifications and maintains a 14kAIC rating at 480V.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | F3B020-R |
| Series | F3B |
| Amperage | 20A |
| 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 answersCan the F3B020 be used in DC electrical systems?
Yes, this breaker is rated for use in DC systems up to 250VDC. It provides a 10kA interrupting capacity (AIC) when used in 250VDC applications.
What wire sizes are accepted by the terminals on the F3B020?
The included lugs accept wire gauges from 14 AWG up to 1/0 AWG. The terminals are dual-rated for use with both copper (Cu) and aluminum (Al) conductors.
How is the F3B020 secured inside the panelboard?
This is a bolt-on circuit breaker. It fastens directly to the panelboard busbar with bolts, which provides a highly secure mechanical and electrical connection compared to plug-on designs.
Are the trip settings on the F3B020 adjustable?
No, this breaker features a fixed thermal-magnetic trip unit. Both the Long-Time (thermal) and Instantaneous (magnetic) trip functions are factory-set and cannot be adjusted in the field.
What panelboards are compatible with the F3B020 breaker?
This F-Frame breaker is designed for installation in compatible legacy ITE and Siemens E-Frame panelboards. Always verify fitment with your specific panelboard enclosure prior to installation.
Does the F3B020-R catalog number indicate a different breaker?
No, F3B020-R is an alternate part number for the standard F3B020. Both numbers refer to the exact same 20A, 3-pole molded case circuit breaker.
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