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Siemens B320 Molded Case Circuit Breaker
- 20A
- 3 Pole
- Bolt-On
Siemens
B320
Molded Case Circuit Breaker
Brand
Siemens
SKU
B320
Quantity
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Siemens B320 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
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Siemens B320 - 20A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B320 |
| Series | B |
| Amperage | 20A |
| 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 | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 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 | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Common Trip, Non-Interchangeable Trip |
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Quantity
Siemens B320 - 20A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B320-R |
| Series | B |
| Amperage | 20A |
| 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 | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 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 | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Common Trip, Non-Interchangeable Trip |
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Description
A dependable solution for three-phase systems, the Siemens B320 is a 20A molded case circuit breaker engineered for commercial applications. It offers fixed thermal and magnetic trip functions to safeguard electrical infrastructure. Designed with a bolt-on connection, it integrates seamlessly into Siemens P1, P2, P3, P4, and P5 panelboards for secure power delivery. This 3-pole breaker provides a 10kAIC interrupting capacity at 240VAC and is fully HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B320-R |
| Series | B |
| Amperage | 20A |
| 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 | 14-10 AWG (Cu), 12-10 AWG (Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 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 | Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Common Trip, Non-Interchangeable Trip |
Product FAQs
5 answersWhich panelboards are compatible with the Siemens B320?
The B320 features a bolt-on connection specifically designed for commercial Siemens P1, P2, P3, P4, and P5 panelboards. Due to its bolt-on design, it will not fit in standard residential load centers that require plug-on type breakers.
Can the B320 circuit breaker be reverse fed?
Yes. The B320 is approved for reverse feed installations. It does not have line or load directional restrictions, allowing it to be safely backfed in applications where permitted by local electrical codes.
Can the Siemens B320 replace older ITE circuit breakers?
Yes. Because Siemens acquired the ITE product lines, the modern Siemens B320 serves as a direct, compatible replacement for legacy ITE B320 and ITE BL series 3-pole 20A bolt-on breakers.
Is the Siemens B320 suitable for HVAC motor loads?
Yes. This breaker carries a certified HACR rating, meaning it is approved for safely protecting group motor loads in heating, air conditioning, and refrigeration equipment.
Can I use aluminum wire with this breaker?
Yes. The B320 terminal lugs accept both copper (14 to 10 AWG) and aluminum (12 to 10 AWG) conductors. When terminating aluminum wire, always follow standard trade practices by applying a compatible anti-oxidant joint compound.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
Total 5 star reviews: 4 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
4 reviews
- DTDavid T.Verified BuyerRated 5 out of 5 stars2/27/26Purchased (3) three phase breakers
These breakers were easy to locate on the website. I received my order in a reasonable amount of time.
- JGJames G.Rated 5 out of 5 stars8/23/19Owner
You have always had instock any style Breaker needed or alternative replacement ship in a timely manner and good product thanks you guys do a great job !!!
- JOJohn O.Rated 5 out of 5 stars10/30/183 pole breakers
Got breakers for a great price and fast service. Will buy from them again.
- KAKeith A.Rated 5 out of 5 stars6/13/17Circuit Breakers
Product delivered as promised and at a great price.