Siemens B125HH Molded Case Circuit Breaker
- 25A
- 1 Pole
- Bolt-On
Quantity
Siemens B125HH - 25A 1 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built to protect circuits against overloads and short circuits, the Siemens B125HH molded case circuit breaker is rated 25A at 120VAC with 1 pole and a 65kAIC interrupting rating at 120VAC. It uses a B frame in the HBL series with bolt-on mounting. Thermal magnetic tripping provides long-time and instantaneous protection. It is UL approved and has a load side lug terminal connection.Specifications
| Brand | Siemens |
|---|---|
| Part Number | B125HH |
| Series | HBL |
| Amperage | 25A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120VAC |
| Frame Type | B |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1 Panelboards |
| Wire Gauge | 8-6 AWG |
| Max Wire | 6 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Padlock Attachment |
|---|---|
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
8 answersWhat circuit applications should I select the Siemens B125HH for?
The Siemens B125HH is rated 120VAC for single-phase service and has 1 pole. Select it for a circuit requiring single-pole protection at that voltage.
How should I use the 25A current rating when selecting this breaker?
The 25A rating is the basis for selecting the breaker for the circuit load and conductor ampacity. Coordinate that rating with the load requirements and applicable conductor protection rules.
How does the interrupting rating affect selection?
The interrupting rating is 65kAIC at 120VAC. Compare the available fault current at the installation point with this rating to ensure the breaker can interrupt the prospective fault current.
How does the thermal-magnetic trip protect the circuit?
The thermal-magnetic trip combines long-time and instantaneous protection. The thermal function responds to sustained overloads, while the magnetic function responds rapidly to high fault currents.
What does bolt-on mounting mean for installation?
Bolt-on mounting uses a bolted attachment to secure the breaker. Plan for fastening during installation rather than a plug-in mounting method.
What conductor sizes can I terminate at the load-side lug?
The load-side lug accepts conductors from AWG 8 through AWG 6. Select a conductor within that range while also meeting the circuit's ampacity requirements.
How much space should I account for when planning the installation?
The breaker measures 3 in high, 1 in wide and 4 in deep. Use these dimensions to plan its physical installation envelope.
Is this breaker UL approved?
Yes, the breaker has UL approval. This is relevant when the project requires UL-approved circuit protection equipment.
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