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Siemens B350HH Molded Case Circuit Breaker
- 50A
- 3 Pole
- Bolt-On
Siemens
B350HH
Molded Case Circuit Breaker
Brand
Siemens
SKU
B350HH
Quantity
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Siemens B350HH - 50A 3 Pole Molded Case Circuit Breaker
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Description
Part of the Siemens HBL frame family, the B350HH is a 3-pole, 50-amp molded case circuit breaker built for demanding commercial and industrial applications. It features thermal-magnetic trip technology for reliable overload and short-circuit protection. This bolt-on breaker installs into Siemens P1, P2, P3, P4, and P5 panelboards. It includes load side lugs and accepts 8-4 AWG aluminum or 8-6 AWG copper wire. With a robust 65kAIC rating at 240VAC, it safely handles high fault currents.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B350HH |
| Series | B |
| Amperage | 50A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-6 AWG (Cu), 8-4 AWG (Al) |
| Max Wire | 6 AWG (Cu), 4 AWG (Al) |
| Min Wire | 8 AWG |
| 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, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Insta-Wire |
Product FAQs
7 answersCan I install the B350HH in a standard load center?
No, the B350HH is a bolt-on molded case circuit breaker designed for commercial and industrial distribution panelboards, specifically the Siemens P1, P2, P3, P4, and P5 series. It will not fit in standard residential plug-on load centers.
What is the difference between the Siemens B350H and the B350HH?
The B350HH is an HBL type breaker with a high interrupting rating of 65kAIC at 240VAC. The standard B350H is a BLH type breaker with a lower 22kAIC rating. Both share the same physical footprint and panel compatibility.
Does the B350HH include load side terminals?
Yes, the breaker comes factory-equipped with load side lugs. These terminals are rated for 8 to 6 AWG copper wire or 8 to 4 AWG aluminum wire.
Is the B350HH suitable for protecting HVAC equipment?
Yes, this breaker is HACR rated. It is certified to safely protect heating, air conditioning, and refrigeration circuits.
What is the industrial cross-reference number for the B350HH?
This Siemens breaker can be directly cross-referenced with part number 6FMC7.
Does the mounting orientation affect the operation of the B350HH?
No, the bolt-on design allows the breaker to be installed in either vertical or horizontal orientations within the panelboard without affecting its thermal-magnetic trip performance.
Can I adjust the trip settings on the B350HH?
No, the B350HH features a fixed thermal-magnetic trip unit. The long-time and instantaneous trip functions are factory set and cannot be modified in the field.
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