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Siemens HGB2B040B Molded Case Circuit Breaker
- 40A
- 2 Pole
- Bolt-On
Siemens
HGB2B040B
Molded Case Circuit Breaker
Brand
Siemens
SKU
HGB2B040B
Quantity
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Siemens HGB2B040B - 40A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial and industrial power systems, this 40A, 2-pole molded case circuit breaker offers reliable thermal-magnetic protection. It features fixed long-time and instantaneous (LI) trip functions to guard against overloads and short circuits. Designed for bolt-on installation, it is compatible with Siemens P1, P2, and P3 panelboards. If a replacement is needed, Siemens designates the 3VA4140-5ED24-0AA0 as the direct substitute when paired with an xGB/3VA strap kit.Specifications
| Brand | Siemens |
|---|---|
| Part Number | HGB2B040B |
| Series | HGB |
| Amperage | 40A |
| 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 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 |
| 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, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
7 answersWhich panelboards are compatible with the Siemens HGB2B040B circuit breaker?
This breaker is designed for use in Siemens P1, P2, and P3 panelboards. It is a panelboard-mounted breaker and is not compatible with standard residential plug-on load centers.
What does the H in the HGB frame designation mean?
The H indicates that it is a High Interrupting capacity version of the Siemens GB frame, offering up to 100kA at 240V and 35kA at 480/277V. This is a step up from the standard NGB frame.
Is the Siemens HGB2B040B suitable for use with HVAC equipment?
Yes, this breaker is HACR rated, making it suitable for group motor installations typically found in heating, air conditioning, and refrigeration equipment.
What wire sizes and materials are accepted by the terminals on this breaker?
The load side lugs accept 8 to 1/0 AWG copper (Cu) wire or 8 to 2/0 AWG aluminum (Al) wire. Always ensure proper torque is applied during installation as specified on the breaker label.
How is the HGB2B040B installed into the panelboard?
It features a bolt-on connection for secure mounting directly to the panelboard bus, ensuring a reliable connection in commercial and industrial distribution systems.
Can the HGB2B040B be used in DC applications?
Yes, it is rated for 125/250VDC with an interrupting capacity of 14kA, making it suitable for specific direct current control and distribution circuits.
Can this breaker be used in a reverse feed application?
Yes, Siemens HGB molded case circuit breakers are suitable for reverse feed applications in panelboards or switchboards.
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