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Siemens LGG3B040L Molded Case Circuit Breaker
- 40A
- 3 Pole
- Unit Mount
Siemens
LGG3B040L
Molded Case Circuit Breaker
Brand
Siemens
SKU
LGG3B040L
Quantity
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Siemens LGG3B040L - 40A 3 Pole Molded Case Circuit Breaker
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Description
Built for heavy-duty distribution, the Siemens LGG3B040L is a 40A, 3-pole molded case circuit breaker designed for commercial and industrial environments. It seamlessly integrates into Siemens enclosures and switchboards. This unit-mount GB/GG frame breaker accommodates 8-1/0 AWG wire and is DIN rail mountable. For modern upgrades, it is replaced by the 3VA5140-6EC31-0AA0. It features a thermal-magnetic trip unit with adjustable instantaneous settings and a 65kAIC rating at 480VAC.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LGG3B040L |
| Series | LGG |
| Amperage | 40A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480Y/277VAC, 480VAC, 600Y/347VAC, 125VDC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 65kA @ 480VAC, 14kA @ 600Y/347VAC, 14kA @ 125VDC, 14kA @ 250VDC |
| Frame Type | LGG |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens Enclosures, Industrial Control Panels, Switchboards, DIN Rail |
| 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, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Line and Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, NOM, UL |
| Temp Rating | 40C |
Product FAQs
6 answersCan the Siemens LGG3B040L be mounted on a DIN rail?
Yes, this GB/GG frame circuit breaker is designed for both unit mounting via screws and direct DIN rail mounting in compatible enclosures and industrial control panels.
What does the LGG frame designation indicate for this breaker?
The LGG frame is part of the Siemens GB/GG family of compact molded case circuit breakers. The L prefix indicates a very high interrupting capacity, providing up to 65kAIC at 480VAC.
What wire sizes are compatible with the lugs on the LGG3B040L?
The included line and load side lugs accept 8 to 1/0 AWG copper wire, or 8 to 2/0 AWG aluminum wire.
Are the trip settings adjustable on this 40A breaker?
This breaker features a thermal magnetic trip unit with a fixed thermal setting for long-time overload protection and an adjustable magnetic setting for instantaneous short-circuit protection.
What does a feed-thru connection mean for the LGG3B040L?
A feed-thru connection means this unit-mount breaker is wired directly via line and load lugs, rather than plugging into or bolting onto a panelboard busbar.
What is the modern replacement for the LGG3B040L?
For modern panel upgrades, the LGG3B040L is typically replaced by the Siemens 3VA5140-6EC31-0AA0 molded case circuit breaker.
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