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Siemens B170HH Molded Case Circuit Breaker
- 70A
- 1 Pole
- Bolt-On
Siemens
B170HH
Molded Case Circuit Breaker
Brand
Siemens
SKU
B170HH
Quantity
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Siemens B170HH - 70A 1 Pole Molded Case Circuit Breaker
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Quantity
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Description
Built to withstand severe electrical faults, the Siemens B170HH features an exceptional 65kA interrupting rating at 120/240V. This 70-amp, single-pole MCCB provides superior thermal-magnetic protection for heavy-duty commercial and industrial environments. It fastens into Siemens P1, P2, P3, P4, and P5 panelboards, ensuring a rigid mechanical connection that resists vibration. The HACR-rated design includes load side lugs and a trip-free mechanism for enhanced operational safety.Specifications
| Brand | Siemens |
|---|---|
| Series | B |
| Amperage | 70A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120/240VAC |
| 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, Handle Tie |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, HACR, NOM, UL |
| Temp Rating | -25C to 70C |
| Construction Features | HACR Rated, Non-Interchangeable Trip, Reverse Feed, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards will accept the B170HH circuit breaker?
The B170HH is a bolt-on branch breaker designed specifically for integration into Siemens P1, P2, P3, P4, and P5 panelboards.
What wire sizes and materials are compatible with the B170HH lugs?
The factory-installed lugs accept 4 to 1/0 AWG copper (Cu) wire or 2 to 1/0 AWG aluminum (Al) wire, providing flexibility for different conductor types during installation.
How does the Siemens B170HH install into a panelboard?
The B170HH utilizes a bolt-on connection, which provides a secure, vibration-resistant mechanical and electrical connection directly to the busbars of compatible Siemens P-series panelboards.
Can the trip settings on the Siemens B170HH be adjusted in the field?
No, the B170HH features a fixed thermal-magnetic trip unit. The long-time and instantaneous (LI) trip functions are factory-calibrated for 70A and cannot be modified by the user.
How does the B170HH differ from the standard B170 and B170H breakers?
All three are 70A, 1-pole breakers in the Siemens B-frame family, but they offer different interrupting capacities. The standard B170 is rated for 10kAIC, the B170H is rated for 22kAIC, and the B170HH provides an extra-high interrupting rating of 65kAIC at 240V for systems with higher available fault currents.
What applications require the 65kAIC rating of the B170HH?
The extra-high 65kAIC interrupting rating is typically required in commercial or industrial facilities where the breaker is located close to a large power source or transformer, resulting in a higher potential short-circuit fault current.
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