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Siemens HGB2B080B Molded Case Circuit Breaker
- 80A
- 2 Pole
- Bolt-On
Siemens
HGB2B080B
Molded Case Circuit Breaker
Brand
Siemens
SKU
HGB2B080B
Quantity
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Siemens HGB2B080B - 80A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial applications, this 80A SENTRON series breaker provides robust thermal-magnetic protection. It features a high interrupting capacity of 100kA at 240VAC and supports reverse feed configurations. Designed to integrate seamlessly, it installs into Siemens P1, P2, P3, P4, and P5 panelboards using a standard bolt-on connection. The unit comes equipped with load-side lugs for straightforward wiring.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HGB2B080B |
| Series | HGB |
| Amperage | 80A |
| 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, 42kA @ 125/250VDC |
| 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 (Cu), 2/0 AWG (Al) |
| 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 HGB2B080B circuit breaker?
This GB frame bolt-on breaker is designed for installation in Siemens P1, P2, P3, P4, and P5 panelboards. It mounts directly to the panelboard bus without requiring additional mounting plates or adapters.
What does the HGB prefix indicate compared to NGB or LGB breakers?
The prefix designates the short circuit interrupting rating of the Siemens GB frame family. NGB is the standard rating, HGB indicates a high interrupting rating, and LGB provides the highest capacity. The HGB2B080B is rated for 100kA at 240VAC and 35kA at 480VAC.
Is the HGB2B080B breaker suitable for reverse feed applications?
Yes. Siemens GB frame thermal magnetic circuit breakers feature non-removable trip units and do not have line and load terminal restrictions, making them UL listed for reverse feeding in back-fed main configurations.
Can the HGB2B080B be applied in DC electrical systems?
Yes, this breaker is rated for direct current applications up to 125/250VDC with a 42kA interrupting capacity. When applied on 250VDC systems, standard wiring configuration requires using a two-pole breaker with one pole on each leg of the supply circuit.
How does the trip mechanism operate on the HGB2B080B?
It utilizes a fixed thermal magnetic trip unit with Long-Time and Instantaneous (LI) protection. The breaker features an overcenter toggle mechanism that is trip-free, ensuring the contacts will open during a fault condition even if the handle is physically held in the closed position.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 2 reviews.
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Rating
2 reviews
- CSCody S.Verified BuyerReviewingSiemens HGB3B020B - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars12/1/25I love SuperBreakers
Excellent shipping time and everything works perfectly
- JMJessica M.ReviewingSiemens HGB3B020B - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/16/23works as intended
works as intended