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Siemens HGB1B070B Molded Case Circuit Breaker
- 70A
- 1 Pole
- Bolt-On
Siemens
HGB1B070B
Molded Case Circuit Breaker
Brand
Siemens
SKU
HGB1B070B
Quantity
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Siemens HGB1B070B - 70A 1 Pole Molded Case Circuit Breaker
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Description
Operating within the Sentron GB frame family, this 70-amp device delivers essential overcurrent mitigation for industrial environments. It utilizes fixed thermal and magnetic trip elements. The breaker fastens securely into Siemens P1 through P5 panelboards. Facilities transitioning to newer standards can substitute this unit with the 3VA5170-5ED12-0AA0 using the proper mounting kit. Boasting a 65kA interrupting capacity at 120VAC, the assembly is HACR rated and permits reverse feeding.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HGB1B070B |
| Series | HGB |
| Amperage | 70A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC, 277VAC, 125VDC, 347VAC |
| Phase | 1 |
| AIC Rating | 65kA @ 120VAC, 35kA @ 277VAC, 42kA @ 125VDC, 14kA @ 347VAC |
| 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, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, High Interrupting Capacity |
Product FAQs
5 answersWhich Siemens panelboards are compatible with the HGB1B070B circuit breaker?
This breaker is designed for installation in Siemens SENTRON P1, P2, P3, P4, and P5 panelboards. It utilizes a bolt-on connection to the panel bus, which provides a highly secure mechanical and electrical connection for commercial and industrial environments.
Can the HGB1B070B be utilized in direct current (DC) applications?
Yes, this breaker is rated for 125VDC systems with a 42kA interrupting capacity. This makes it suitable for use in DC control panels, battery backup systems, and industrial DC distribution networks.
What wire sizes and materials are supported by the lugs on this 70A breaker?
The factory lugs accept 8 AWG to 1/0 AWG copper (Cu) conductors, or 8 AWG to 2/0 AWG aluminum (Al) conductors. Always apply an approved oxide inhibitor when terminating aluminum wire and torque to the manufacturer specifications printed on the breaker.
How does the HGB frame differ from standard GB frame breakers?
The 'H' in the HGB prefix designates a high interrupting capacity version of the standard GB frame. The HGB1B070B provides up to 65kAIC at 120VAC and 35kAIC at 277VAC, allowing it to be installed in electrical systems with higher available fault currents.
What type of protection does the LI trip unit provide?
The breaker features a fixed thermal magnetic trip unit with Long-Time (L) and Instantaneous (I) functions. The thermal component provides delayed tripping for sustained overloads, while the magnetic component trips immediately to clear short circuits.
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