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Siemens B270 Miniature Circuit Breaker
- 70A
- 2 Pole
- Bolt-On
Siemens
B270
Miniature Circuit Breaker
Brand
Siemens
SKU
B270
Quantity
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Siemens B270 - 70A 2 Pole Miniature Circuit Breaker
New
Quantity
Quantity
Siemens B270 - 70A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B270 |
| Series | B |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Sold out
Quantity
Siemens B270 - 70A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | B270-R |
| Series | B |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
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Description
Delivering dependable power distribution for commercial and industrial facilities, the Siemens B270 is a 70A, two-pole miniature circuit breaker. It features a standard 10kAIC interrupt rating at 120/240VAC to handle everyday electrical demands. This unit utilizes a secure bolt-on mounting style, ensuring a solid connection in high-vibration environments. It is fully compatible with Siemens P1, P2, P3, P4, and P5 panelboards. The breaker is HACR rated and includes load side lugs for wiring.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B270 |
| Series | B |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| 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 Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment, Handle Tie |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
6 answersWhat panelboards are compatible with the Siemens B270?
The B270 is designed for use in Siemens P1, P2, P3, P4, and P5 panelboards. It features a bolt-on mounting style for secure installation in these commercial distribution panels.
Can the Siemens B270 replace an older ITE circuit breaker?
Yes. Siemens acquired ITE, and the modern Siemens B270 is the direct, manufacturer-approved replacement for legacy ITE B270 circuit breakers. It shares the exact physical dimensions and bolt-on mounting configuration.
What wire sizes are accepted by the lugs on the B270?
The load side lugs on this 70A breaker accept 4 to 1/0 AWG copper wire or 2 to 1/0 AWG aluminum wire. Always torque the terminals to the specifications printed directly on the breaker label during installation.
What does the BL frame designation mean for this breaker?
The BL frame indicates that this is a standard-interrupting, bolt-on miniature circuit breaker. It provides a 10kAIC rating at 120/240VAC, which is suitable for standard commercial and industrial branch circuit protection.
What type of protection does the thermal-magnetic trip unit provide?
The thermal-magnetic trip unit offers two layers of protection. The thermal element responds to gradual overcurrent conditions, while the magnetic element trips instantaneously in the event of a short circuit.
How is the B270 secured inside the panelboard?
This is a bolt-on breaker, meaning it physically bolts directly to the panelboard busbar rather than snapping into place. This provides a highly secure electrical connection that resists vibration in industrial environments.
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