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Siemens B245HH Molded Case Circuit Breaker
- 45A
- 2 Pole
- Bolt-On
Siemens
B245HH
Molded Case Circuit Breaker
Brand
Siemens
SKU
B245HH
Quantity
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Siemens B245HH - 45A 2 Pole Molded Case Circuit Breaker
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Description
Delivering a high-interrupt 65 kAIC rating, the Siemens B245HH is a 2-pole, 45-amp molded case circuit breaker. It provides robust thermal-magnetic protection for systems requiring elevated fault current handling. This HBL-type breaker mounts securely into Siemens P1 through P5 panelboards. The included load-side lugs accept 8-6 AWG copper or 8-4 AWG aluminum wiring. Designed for 120/240VAC applications, it offers reliable LI trip functions and is HACR rated for heating and cooling loads.Specifications
| Brand | Siemens |
|---|---|
| Series | B |
| Amperage | 45A |
| 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 | 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 | 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 |
Product FAQs
5 answersCan I use the Siemens B245HH in a standard residential load center?
No, the B245HH is a bolt-on breaker designed specifically for commercial Siemens P1, P2, P3, P4, and P5 panelboards. It will not fit in standard plug-on load centers.
Is the Siemens B245HH rated for HVAC equipment?
Yes, this breaker is HACR rated. It is fully approved for use with heating, air conditioning, and refrigeration motor loads.
What is the difference between the Siemens B245, B245H, and B245HH?
These breakers share the same physical footprint and panelboard compatibility but have different interrupting ratings. The standard B245 (BL type) is rated 10 kAIC, the B245H (BLH type) is 22 kAIC, and the B245HH (HBL type) provides the highest rating at 65 kAIC.
How does the thermal-magnetic trip unit in the B245HH operate?
The thermal component provides a delayed trip for sustained overloads, preventing nuisance tripping from temporary motor surges, while the magnetic component provides an instantaneous trip to quickly clear severe short circuits.
What is the advantage of the bolt-on connection used by the B245HH?
The bolt-on mounting style fastens directly to the panelboard bus bars, creating a secure, vibration-resistant connection that is ideal for heavy-duty commercial and industrial environments.
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