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Siemens NGB2B080B Molded Case Circuit Breaker
- 80A
- 2 Pole
- Bolt-On
Siemens
NGB2B080B
Molded Case Circuit Breaker
Brand
Siemens
SKU
NGB2B080B
Quantity
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Siemens NGB2B080B - 80A 2 Pole Molded Case Circuit Breaker
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Description
Belonging to the SENTRON GB frame family, the NGB2B080B provides robust overcurrent protection for commercial and industrial applications. This 2-pole, 80A molded case circuit breaker features a fixed thermal-magnetic trip unit with long-time and instantaneous (LI) functions. It installs into Siemens P1, P2, and P3 panelboards via a secure bolt-on connection. Rated for 100 kAIC at 240VAC and 25 kAIC at 480Y/277VAC, it is HACR rated and suitable for reverse feed setups.Specifications
| Brand | Siemens |
|---|---|
| Series | NGB |
| Amperage | 80A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 25kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | NGB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 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 Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
6 answersWhat panelboards are compatible with the Siemens NGB2B080B?
This bolt-on circuit breaker is designed exclusively for use in Siemens P1, P2, and P3 panelboards. It is not compatible with standard residential load centers.
Is the NGB2B080B suitable for reverse feed applications?
Yes, this breaker is suitable for reverse feed applications, allowing it to be back-fed in compatible panelboards.
Can this breaker be used in DC voltage systems?
Yes, the NGB2B080B is rated for use in DC applications up to 250VDC, providing an interrupting rating of 14kAIC.
What is the difference between the Siemens NGB, HGB, and LGB circuit breakers?
All three belong to the same GB frame family and share the same physical dimensions, but they feature different interrupting ratings. The NGB offers standard interrupting capacity, while the HGB and LGB provide high and extra-high interrupting ratings, respectively.
What type of wire can be used with the lugs on this breaker?
The included lugs are dual-rated for both copper (Cu) and aluminum (Al) conductors. They accept 8 to 1/0 AWG copper wire or 8 to 2/0 AWG aluminum wire.
Does the NGB2B080B provide ground fault or arc fault protection?
No, this is a standard thermal-magnetic circuit breaker equipped with long-time and instantaneous (LI) trip functions. It does not include GFCI or AFCI protection.
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