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Siemens B370 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
B370
Molded Case Circuit Breaker
Brand
Siemens
SKU
B370
Quantity
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Siemens B370 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens B370 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B370 |
| Series | B |
| Amperage | 70A |
| 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 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 | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
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Siemens B370 - 70A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B370-R |
| Series | B |
| Amperage | 70A |
| 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 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 | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
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Description
Designed for commercial power systems, the Siemens B370 is a 70A, three-pole molded case circuit breaker belonging to the BL series. It ensures reliable branch circuit protection in demanding environments. The breaker utilizes a secure bolt-on mounting configuration for stable integration. It is fully compatible with Siemens P1, P2, and P3 panelboards, featuring load side lugs that accept 4-1/0 AWG copper or 2-1/0 AWG aluminum conductors.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B370 |
| Series | B |
| Amperage | 70A |
| 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 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 | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip |
Product FAQs
8 answersWhich panelboards accept the Siemens B370 circuit breaker?
This bolt-on breaker is compatible with Siemens P1, P2, and P3 panelboards [1.3.3]. It also fits many legacy ITE and Gould distribution panels designed for BL frame breakers.
Is the Siemens B370 a direct replacement for the ITE B370?
Yes. Siemens acquired ITE, and the current Siemens B370 serves as the exact, manufacturer-approved replacement for older ITE and Gould B370 circuit breakers.
What is the acceptable wire gauge for the B370 load lugs?
The included load side lugs accommodate 4 AWG to 1/0 AWG copper wire, or 2 AWG to 1/0 AWG aluminum wire. Always torque the terminals to the manufacturer specifications printed on the breaker label.
Are the trip settings on the B370 adjustable?
No. This breaker features a fixed thermal-magnetic trip unit. Both the long-time overload and instantaneous short-circuit trip functions are factory set and cannot be modified.
How does this breaker connect to the panelboard bus?
The B370 utilizes a bolt-on connection. It fastens securely to the panelboard busbar using screws, which provides a high-reliability mechanical and electrical connection common in commercial environments.
Is this breaker rated for HVAC equipment?
Yes. The Siemens B370 is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment that requires branch circuit protection.
What does the 10kAIC rating mean for system design?
The 10,000 Ampere Interrupting Capacity (10kAIC) indicates the maximum short-circuit fault current the breaker can safely clear at 240VAC. Verify that your system's available fault current does not exceed this value before installation.
Do I need to purchase load lugs separately?
No. The B370 ships with the standard load side lugs factory-installed and ready for wiring.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
Total 5 star reviews: 1 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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1 review
- LOLarry O.Rated 5 out of 5 stars7/30/18Just what I needed and
Just what I needed and delivery was right on time. The cost was great compared to new prices.
Thank You and I will order again.