Siemens LGG3B125L Molded Case Circuit Breaker
- 125A
- 3 Pole
- Unit Mount
Quantity
Siemens LGG3B125L - 125A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
A reliable choice for commercial facilities, the Siemens LGG3B125L 125A, 3-pole molded case circuit breaker serves as a core component of the Sentron series. It provides essential long-time and instantaneous (LI) protection with an adjustable magnetic trip mechanism. This unit mount breaker installs seamlessly into Siemens switchboards and industrial control panels. It offers a 65kA interrupting capacity at 480VAC. When replacing this unit, the 3VA5112-6EC31-0AA0 is the recommended substitute.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LGG3B125L |
| Series | LGG |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Unit Mount |
| Voltage | 240VAC, 480VAC, 600Y/347VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 65kA @ 480VAC, 25kA @ 600Y/347VAC, 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Line & Load Side Lugs |
| 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 answersWhat wire sizes are accepted by the lugs on the LGG3B125L?
The factory lugs accept 8 to 1/0 AWG copper (Cu) conductors or 8 to 2/0 AWG aluminum (Al) conductors.
Where is this breaker typically installed?
This unit mount breaker is designed for use in Siemens enclosures, industrial control panels, and switchboards. It is also compatible with DIN rail mounting configurations.
What adjustability does the thermal magnetic trip unit offer?
The LGG3B125L features a fixed thermal element for long-time overload protection and an adjustable magnetic element for instantaneous short-circuit response.
Is this breaker rated for direct current (DC) applications?
Yes, it is rated for use in DC systems up to 250VDC, providing a 14kA interrupting capacity at that voltage.
What frame class does the LGG3B125L belong to?
This breaker is part of the Siemens SENTRON family and falls under the GB/GG frame classification.
How is the LGG3B125L breaker mounted?
This is a unit mount, feed-thru circuit breaker. It does not plug into a busbar and requires hardwired connections at both the line and load terminals.
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