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Siemens LGB3B030B Molded Case Circuit Breaker
- 30A
- 3 Pole
- Bolt-On
Siemens
LGB3B030B
Molded Case Circuit Breaker
Brand
Siemens
SKU
LGB3B030B
Quantity
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Siemens LGB3B030B - 30A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens LGB3B030B - 30A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | LGB3B030B |
| Series | LGB |
| Amperage | 30A |
| 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 |
| 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 Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated |
Quantity
Siemens LGB3B030B - 30A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 30A |
| 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 |
| 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 Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated |
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Description
Part of the SENTRON family, the Siemens LGB3B030B is a 3-pole, 30A molded case circuit breaker built for commercial power distribution. It provides robust thermal-magnetic trip functions to safeguard electrical systems against overloads. This GB-frame breaker installs into Siemens P1, P2, and P3 panelboards using a secure bolt-on connection. Rated for 100 kAIC at 240VAC, it handles substantial fault currents. It is replaced by the 3VA5130-6ED31-0AA0, which requires a mounting strap kit.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LGB3B030B |
| Series | LGB |
| Amperage | 30A |
| 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 |
| 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 Side Lugs |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, HID Rated |
Product FAQs
5 answersWhich Siemens panelboards accept the LGB3B030B circuit breaker?
The LGB3B030B is a GB-frame breaker that mounts directly to the bus structure of Siemens P1, P2, and P3 distribution panelboards using a secure bolt-on connection.
Are the trip points on the LGB3B030B adjustable for system coordination?
No, this thermal magnetic breaker features fixed long-time and fixed instantaneous (LI) trip functions. Electricians requiring field-adjustable trip settings for selective coordination will need a breaker with an electronic trip unit instead.
What is the recommended modern replacement for the Siemens LGB3B030B?
Siemens is transitioning this series to the newer 3VA line. The standard replacement is catalog number 3VA5130-6ED31-0AA0. Note that retrofitting the 3VA breaker into existing legacy panelboards requires a separate mounting strap kit.
How does the interrupting capacity of the LGB3B030B vary by system voltage?
The fault-clearing capability depends on the application voltage. It provides a high interrupting rating of 100kAIC at 240VAC, 65kAIC at 480Y/277VAC, and 14kAIC for both 600Y/347VAC and 125/250VDC systems.
Is the Siemens LGB3B030B suitable for HVAC and lighting applications?
Yes, this breaker is HACR rated for use with heating, air conditioning, and refrigeration equipment. It is also HID rated, allowing it to safely switch high-intensity discharge lighting loads.
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