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Siemens HGB2B045B Molded Case Circuit Breaker
- 45A
- 2 Pole
- Bolt-On
Siemens
HGB2B045B
Molded Case Circuit Breaker
Brand
Siemens
SKU
HGB2B045B
Quantity
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Siemens HGB2B045B - 45A 2 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty commercial environments, this 45-amp SENTRON series molded case circuit breaker delivers dependable thermal-magnetic protection. It provides fixed long-time and instantaneous (LI) trip functions for robust circuit defense. The breaker utilizes a bolt-on mounting style and is designed for use with Siemens P1, P2, P3, P4, and P5 panelboards. It is officially replaced by the 3VA5145-5ED22-0AA0, which requires a specialized mounting kit for retrofitting.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HGB2B045B |
| Series | HGB |
| Amperage | 45A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 35kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | HGB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3, P4, P5 Panelboards |
| Wire Gauge | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 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 | Shunt Trip, Auxiliary Switch, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity |
Product FAQs
5 answersWhich Siemens panelboards accept the HGB2B045B circuit breaker?
This bolt-on breaker is designed for installation in Siemens P1, P2, P3, P4, and P5 panelboards.
What wire sizes are compatible with the lugs on this 45A breaker?
The factory lugs accept 8 to 1/0 AWG copper wire or 8 to 2/0 AWG aluminum wire.
Can the HGB2B045B be used in DC voltage systems?
Yes, this thermal magnetic breaker is rated for 125/250VDC applications and provides a 14kA interrupting capacity at that voltage.
How is the HGB2B045B installed into the panelboard?
It features a bolt-on connection type, requiring it to be mechanically fastened directly to the panelboard bus rather than snapped into place.
What frame family does this breaker belong to?
It is part of the Siemens Sentron series and utilizes the HGB frame, which falls under the broader GB and GG frame group.
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