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Siemens B235HH Molded Case Circuit Breaker
- 35A
- 2 Pole
- Bolt-On
Siemens
B235HH
Molded Case Circuit Breaker
Brand
Siemens
SKU
B235HH
Quantity
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Siemens B235HH - 35A 2 Pole Molded Case Circuit Breaker
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Description
Part of Siemens' B-frame family, this 35A molded case circuit breaker provides reliable thermal-magnetic protection for commercial and industrial applications. It features a bolt-on mounting style for secure connections in demanding environments. The unit installs into Siemens P1, P2, P3, P4, and P5 panelboards. It includes factory-installed load side lugs and accepts 10-6 AWG aluminum or 10-8 AWG copper wire. Engineered for severe fault conditions, it carries a 65kAIC rating at 120/240VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B235HH |
| Series | B |
| Amperage | 35A |
| Poles | 2 |
| 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 | 10-8 AWG (Cu), 10-6 AWG (Al) |
| Max Wire | 8 AWG (Cu), 6 AWG (Al) |
| Min Wire | 10 AWG |
| 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, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Extra High Interrupting Capacity, Non-Interchangeable Trip, Trip-Free Mechanism, Quick-Make/Quick-Break |
Product FAQs
6 answersWhich panelboards are compatible with the B235HH breaker?
The B235HH is designed specifically for Siemens P1, P2, P3, P4, and P5 commercial panelboards. Because it uses a bolt-on connection, it cannot be installed in standard residential plug-on load centers.
What does the HH suffix in the B235HH catalog number mean?
In Siemens B-frame nomenclature, the HH suffix indicates an HBL type circuit breaker. This designates a high interrupting capacity of 65kAIC at 120/240VAC, making it suitable for commercial systems with elevated available fault currents.
Can I terminate aluminum conductors on this breaker?
Yes, the factory-installed load lugs are dual-rated for both copper and aluminum wire. They accept 10 to 6 AWG aluminum conductors or 10 to 8 AWG copper conductors.
How does the thermal-magnetic trip unit operate on the B235HH?
The breaker uses a fixed thermal-magnetic (LI) trip mechanism. The thermal element provides long-time protection by reacting to sustained overloads, while the magnetic element provides instantaneous protection by tripping immediately during severe short circuits.
Is this breaker suitable for series-rated systems?
Yes, as an HBL type breaker with a 65kAIC rating, the B235HH can often be used in UL-listed series combinations with downstream breakers that have lower individual interrupting ratings. Always verify the specific series combination in the panelboard labeling or Siemens SpeedFax catalog.
Why does the B235HH use a bolt-on connection?
Bolt-on breakers physically screw directly into the panelboard bus. This creates a highly secure, low-resistance connection that prevents the breaker from vibrating loose in demanding commercial and industrial environments.
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