Siemens LGB2K030B Molded Case Circuit Breaker
- 30A
- 2 Pole
- Bolt-On
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Siemens LGB2K030B - 30A 2 Pole Molded Case Circuit Breaker
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Description
Engineered for commercial distribution, the Siemens LGB2K030B is a 2-pole, 30A molded case circuit breaker from the SENTRON family. It utilizes a thermal-magnetic trip unit for reliable LI protection. This GB-frame breaker mounts into Siemens P1, P2, and P3 panelboards. It includes load-side lugs and is the predecessor to the 3VA5130-6ED21-0AA0 replacement. Rated for high interrupting capacity, it handles 100kAIC at 240V and 65kAIC at 480V while being HACR rated for HVAC applications.Specifications
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 30A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 1 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480Y/277VAC, 25kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| Frame Type | LGB |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens P1, P2, P3 Panelboards |
| Wire Gauge | 14-6 AWG (Cu), 12-6 AWG (Al) |
| Max Wire | 6 AWG |
| Min Wire | 14 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, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, Reverse Feed, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism, Common Trip |
Product FAQs
6 answersWhich panelboards are compatible with the Siemens LGB2K030B?
This bolt-on circuit breaker is designed for use in Siemens P1, P2, and P3 series panelboards. It mounts directly to the busbars using a bolted connection, ensuring a secure and reliable electrical contact for commercial and industrial applications.
What wire sizes and materials are accepted by the LGB2K030B terminals?
The standard lugs accept 14 to 6 AWG copper wire or 12 to 6 AWG aluminum wire. Always ensure proper torque specifications are followed during installation to prevent terminal overheating and maintain a secure connection.
Can the LGB2K030B be used in DC voltage applications?
Yes, this breaker is rated for DC applications up to 125/250VDC, providing a 14kA interrupting capacity. This makes it suitable for specific industrial control or battery backup circuits requiring reliable DC protection.
What does the 65kAIC rating at 480V mean for this breaker?
The 65kAIC rating indicates the maximum fault current the breaker can safely interrupt at 480VAC without sustaining damage. This high interrupting capacity is typical for commercial and industrial distribution systems with significant available fault current.
Is the LGB2K030B interchangeable with other GB or GG frame breakers?
The LGB2K030B belongs to the Siemens GB/GG frame family. While it shares physical dimensions with other breakers in this frame group, you must verify that the interrupting ratings and panelboard mounting requirements match your specific application before substituting.
What type of trip mechanism does the LGB2K030B utilize?
It features a fixed thermal-magnetic trip unit. The thermal element provides long-time protection against gradual overloads, while the magnetic element offers instantaneous protection against severe short circuits.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 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.