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Siemens B380 Molded Case Circuit Breaker
- 80A
- 3 Pole
- Bolt-On
Siemens
B380
Molded Case Circuit Breaker
Brand
Siemens
SKU
B380
Quantity
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Siemens B380 - 80A 3 Pole Molded Case Circuit Breaker
New
Quantity
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Siemens B380 - 80A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B380 |
| Series | BL |
| Amperage | 80A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
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Siemens B380 - 80A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B380-R |
| Series | BL |
| Amperage | 80A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
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Description
Built for commercial and industrial power distribution, the Siemens B380 is a 3-pole, 80A molded case circuit breaker from the BL series. It provides dependable thermal-magnetic overcurrent protection for demanding environments. This bolt-on MCCB mounts into Siemens P1, P2, P3, P4, and P5 panelboards. It accepts 4-1/0 AWG copper or 2-1/0 AWG aluminum wire via standard load-side lugs, ensuring secure connections. Rated for 10kAIC at 240VAC, the breaker is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B380 |
| Series | BL |
| Amperage | 80A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 4-1/0 AWG (Cu), 2-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 4 AWG (Cu), 2 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | None included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
8 answersWhat panelboards are compatible with the Siemens B380?
The B380 is a bolt-on branch breaker designed for Siemens P1, P2, P3, P4, and P5 series panelboards. Always confirm compatibility by checking the wiring diagram or UL label inside your specific panel enclosure.
Is the Siemens B380 an acceptable replacement for older ITE breakers?
Yes, the B380 is the current production replacement for obsolete ITE and Siemens-Allis BL-frame 80A, 3-pole bolt-on breakers. It shares the identical physical dimensions and bus bar connection type.
Is this circuit breaker HACR rated?
Yes, the B380 carries a HACR rating, making it certified for use with Heating, Air Conditioning, and Refrigeration equipment that explicitly requires HACR overcurrent protection.
Can the B380 be reverse fed in a panel?
Yes. Because this BL-frame breaker utilizes a fixed, non-interchangeable thermal-magnetic trip unit, it is suitable for reverse-feed applications according to UL 489 standards.
Can this breaker be used in series-rated systems?
Yes, the B380 can be applied in UL-listed series rated combinations with an upstream main breaker or fuse. This allows it to be installed in systems with available fault currents that exceed its standalone 10kAIC rating. Always reference your panel's series rating chart for approved combinations.
Can the B380 be mounted in any orientation?
Yes, thermal-magnetic molded case circuit breakers like the B380 can be mounted vertically, horizontally, or inverted within the panelboard without affecting their trip characteristics or calibration.
What does the LI trip function on this breaker indicate?
The LI designation means the breaker provides Long-Time (L) protection against thermal overloads and Instantaneous (I) protection against short circuits. Both trip thresholds are fixed and cannot be field-adjusted.
Is the B380 suitable for residential single-phase load centers?
No, the B380 is a 3-pole breaker strictly designed for 3-phase commercial and industrial applications. It will not fit properly or safely into standard single-phase residential load centers.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 35 reviews.
Total 5 star reviews: 34 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
Reviews Summary
Generated by AI from 66 most recent customer reviews
Last updated 8/15/25
Customers say these circuit breakers meet their specifications and perform as expected. Many reviews highlight the quick delivery times and competitive pricing. Frequent comments address the reliable product quality and ease of installation. The ordering process receives praise for its simplicity, with users noting consistent product availability.
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Rating
35 reviews
- TSTom S.Verified BuyerReviewingSiemens B3100 3 Pole Circuit BreakerI recommend this productRated 5 out of 5 stars8/3/26Superbreakers is our go to!
Great prices, great service and quick delivery.
- MGMaggie G.Verified BuyerReviewingSiemens B250 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/24/26Great Service
Came in great condition and in an incredibly timely manner. Will continue superbreakers for all of my orders in the future!
- DBDonnie B.Verified BuyerReviewingSiemens B115 - 15A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/11/26New Breaker
Awesome breaker & Superbreakers is a awesome company!
- BLBrian L.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars6/4/26Brian
Works great
- JFJoseph F.Verified BuyerReviewingSiemens B120 - 20A 1 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/23/26Great value
It was a great value