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Siemens HGB3B100B Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Siemens
HGB3B100B
Molded Case Circuit Breaker
Brand
Siemens
SKU
HGB3B100B
Quantity
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Siemens HGB3B100B - 100A 3 Pole Molded Case Circuit Breaker
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Description
The Siemens HGB3B100B provides reliable thermal-magnetic protection for commercial and industrial applications. This 3-pole, 100A molded case circuit breaker is part of the SENTRON GB frame family, featuring a high interrupting capacity of 35kA at 480Y/277V and 100kA at 240V. It installs into Siemens P1, P2, P3, P4, and P5 panelboards using a secure bolt-on connection. Note that this unit is replaced by the 3VA5110-6ED31-0AA0, which requires a separate mounting kit.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HGB3B100B |
| Series | HGB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 35kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 42kA @ 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 (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, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity, Common Trip, Trip-Free Mechanism, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the HGB3B100B circuit breaker?
This breaker is designed specifically for Siemens Sentron P1, P2, P3, P4, and P5 panelboards. It features a bolt-on connection that secures directly to the panelboard bus, ensuring a rigid and reliable electrical connection.
What is the difference between Siemens NGB, HGB, and LGB circuit breakers?
All three belong to the same Sentron GB frame family and share identical physical dimensions, but they differ in short-circuit interrupting capacity. The NGB is the standard-tier breaker, the HGB offers high interrupting ratings, and the LGB provides the highest interrupting capacity for applications with higher available fault currents.
Is the HGB3B100B suitable for direct current (DC) applications?
Yes, because it utilizes a thermal-magnetic trip unit, it can be applied in DC circuits. It carries a DC interrupting rating of 42kA at 125/250VDC, making it appropriate for battery backups, solar applications, or other compatible DC systems.
What do the LI trip functions indicate on the HGB3B100B?
The LI designation means the breaker provides Long-Time (overload) and Instantaneous (short-circuit) protection. Because this is a fixed thermal-magnetic breaker, both the thermal and magnetic trip points are factory-calibrated and cannot be adjusted in the field.
Can the HGB3B100B be mounted on a standard DIN rail?
No, the HGB3B100B is strictly a bolt-on circuit breaker configured for panelboard mounting. While some global variants in the Siemens G-frame family support DIN rail mounting, the HGB is designed exclusively to bolt into Sentron distribution panels.
Are the lugs on the HGB3B100B rated for aluminum wire?
Yes, the factory-installed lugs are dual-rated for both copper and aluminum conductors. They accept 8 to 1/0 AWG copper wire or slightly larger 8 to 2/0 AWG aluminum wire to account for the difference in ampacity between the two metals.
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