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Siemens EF3B080 Molded Case Circuit Breaker
- 80A
- 3 Pole
- Bolt-On
Siemens
EF3B080
Molded Case Circuit Breaker
Brand
Siemens
SKU
EF3B080
Quantity
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Siemens EF3B080 - 80A 3 Pole Molded Case Circuit Breaker
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Description
Operating as a crucial safety component, the Siemens EF3B080 provides 80 amps of thermal-magnetic protection across three poles. This E-frame device is engineered for demanding commercial environments requiring fixed LI functions. Installation is straightforward for Siemens P1, P2, and P3 panelboards, alongside older I-T-E systems. When modernizing panels, technicians frequently substitute this unit with the ED63B080. It carries an 18kAIC rating at 240VAC and features a non-interchangeable trip.Specifications
| Brand | Siemens |
|---|---|
| Part Number | EF3B080-R |
| Series | EF |
| Amperage | 80A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens P1, P2, P3 Panelboards, Legacy I-T-E Panelboards |
| Wire Gauge | 10-1/0 AWG (Cu), 12-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG (Cu), 12 AWG (Al) |
| 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 | UL 489, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
6 answersIs the EF3B080 circuit breaker still in active production?
The EF3B080 is a legacy E frame breaker originally manufactured by I-T-E and Siemens. When modernizing panels, technicians frequently substitute this unit with the current ED frame equivalent, catalog number ED63B080.
Which panelboards are compatible with this E frame breaker?
This bolt-on breaker is designed for direct installation into Siemens P1, P2, and P3 panelboards, as well as legacy I-T-E panelboard systems.
What wire sizes are accepted by the load side lugs on this 80A breaker?
The included load side lugs accept 10 to 1/0 AWG copper wire or 12 to 1/0 AWG aluminum wire. Ensure proper torque specifications are followed during installation.
Can this breaker be used in DC voltage applications?
Yes, the EF3B080 is rated for up to 250VDC with a 10kA interrupting capacity, making it suitable for specific direct current applications in addition to standard AC systems.
Does this breaker feature an interchangeable trip unit?
No, it features a non-interchangeable thermal magnetic trip unit with fixed long-time and instantaneous (LI) functions.
Is the EF3B080 suitable for heating, air conditioning, and refrigeration equipment?
Yes, this breaker is HACR rated, meaning it is tested and approved for protecting dedicated HVACR circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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Rating
2 reviews
- VGVictor G.Verified BuyerRated 5 out of 5 stars11/6/25Breakers fit my needs
I wish I would of shopped this I found exact breaker for 400.00 cheaper
- RFRobert F.ReviewingSiemens EF3A100 - 100A 3 Pole Motor Circuit ProtectorI recommend this productRated 5 out of 5 stars7/25/22Fast order and service for a part in good condition
Fast order and service for a part in good condition.