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Siemens LGB3B040B Molded Case Circuit Breaker
- 40A
- 3 Pole
- Bolt-On
Siemens
LGB3B040B
Molded Case Circuit Breaker
Brand
Siemens
SKU
LGB3B040B
Quantity
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Siemens LGB3B040B - 40A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens LGB3B040B - 40A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | LGB3B040B |
| Series | LGB |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | LGB |
|---|---|
| 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 Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Reverse Feed, Trip-Free Mechanism, Common Trip |
Quantity
Siemens LGB3B040B - 40A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | LGB |
|---|---|
| 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 Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Reverse Feed, Trip-Free Mechanism, Common Trip |
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Description
Built for commercial and industrial applications, the Siemens LGB3B040B is a 3-pole, 40A molded case circuit breaker from the Sentron GB frame family. It features thermal-magnetic trip technology with fixed long-time and instantaneous (LI) protection functions. This unit mounts into Siemens P1, P2, and P3 panelboards. Rated for 100kAIC at 240VAC and 65kAIC at 480Y/277VAC, it provides robust high-interrupting capacity. Note: This model is replaced by the 3VA5140-6ED31-0AA0.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LGB3B040B |
| Series | LGB |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | LGB |
|---|---|
| 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 Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Reverse Feed, Trip-Free Mechanism, Common Trip |
Product FAQs
5 answersWhich Siemens panelboards are compatible with the LGB3B040B circuit breaker?
This breaker is specifically designed for bolt-on installation in Siemens P1, P2, and P3 series distribution panelboards.
What conductor sizes are supported by the factory lugs?
The standard equipped lugs accept 8 AWG through 1/0 AWG for copper wire, and 8 AWG through 2/0 AWG for aluminum wire.
Can the thermal or magnetic trip settings be adjusted in the field?
No, this unit relies on fixed thermal and fixed magnetic trip mechanisms. Both the long time and instantaneous parameters are permanently set at the factory.
Is the LGB3B040B rated for DC voltage applications?
Yes, in addition to its standard AC ratings, this breaker is certified for use in DC systems with an interrupting rating of 14kA at 125/250VDC.
What frame group does this breaker belong to?
It is classified under the Siemens SENTRON family and fits within the standard GB and GG frame groups.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 1 review.
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Rating
1 review
- RSRon S.Verified BuyerReviewingSiemens LGB3B045B - 45A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/27/26Siemens Breaker
The breaker was exactly what I needed, and it came within a couple days. The price was in line of what it should’ve been. This was my third purchase from Super Breakers. I will definitely use them again in the future.