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Siemens LGB2B030B Molded Case Circuit Breaker
- 30A
- 2 Pole
- Bolt-On
Siemens
LGB2B030B
Molded Case Circuit Breaker
Brand
Siemens
SKU
LGB2B030B
Quantity
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Siemens LGB2B030B - 30A 2 Pole Molded Case Circuit Breaker
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Description
Part of the Sentron series, the Siemens LGB2B030B is a 30A, 2-pole molded case circuit breaker built for commercial power distribution. It features a thermal-magnetic trip unit providing reliable long-time and instantaneous protection. This bolt-on MCCB installs into Siemens P1, P2, and P3 panelboards. Rated for 65 kAIC at 480Y/277VAC and 100 kAIC at 240VAC, it handles demanding fault currents. The breaker is HACR rated and serves as a legacy replacement prior to the 3VA41 series transition.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, 14kA @ 600Y/347VAC, 14kA @ 125/250VDC |
| 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 |
|---|---|
| Accessories | Load Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated, High Interrupting Capacity, Reverse Feed, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
5 answersWhich Siemens panelboards are compatible with the LGB2B030B breaker?
This bolt-on breaker is designed for installation in Siemens P1, P2, and P3 series panelboards.
What wire sizes are accepted by the lugs on this breaker?
The terminals accommodate 14 to 6 AWG copper wire or 12 to 6 AWG aluminum wire.
Can I adjust the trip settings on the LGB2B030B?
No, this breaker features fixed thermal and fixed magnetic trip elements for long-time and instantaneous protection. The trip points cannot be adjusted in the field.
Is this breaker suitable for direct current systems?
Yes, it carries a DC interrupting rating of 14kA at 125 or 250VDC, allowing it to be used in specific direct current applications.
What frame class does the LGB2B030B belong to?
It is a GB frame molded case circuit breaker, which is part of the Siemens Sentron family of protective devices.
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