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Siemens LGB3B070B Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Siemens
LGB3B070B
Molded Case Circuit Breaker
Brand
Siemens
SKU
LGB3B070B
Quantity
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Siemens LGB3B070B - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Siemens LGB3B070B - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 70A |
| 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 | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 8 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, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
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Siemens LGB3B070B - 70A 3 Pole Molded Case Circuit Breaker
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Quantity
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 70A |
| 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 | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 8 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, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
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Description
Built for heavy-duty electrical systems, the Siemens LGB3B070B is a 3-pole, 70A molded case circuit breaker. It utilizes fixed thermal and magnetic trip elements to deliver reliable long-time and instantaneous (LI) protection for commercial facilities. Designed with a low tab configuration, this bolt-on MCCB mounts into Siemens P1, P2, and P3 panelboards. For future upgrades, it is replaced by the 3VA5170-6ED31-0AA0. It features a 100kAIC rating at 240VAC and is fully HACR rated.Specifications
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 70A |
| 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 | 8-1/0 AWG (Cu), 8-2/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 8 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, IEC 60947-2, UL 489 |
| Approval | CE, CSA, IEC, NOM, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
5 answersHow does the LGB3B070B install into Siemens panelboards?
It is a bolt-on breaker designed specifically for Siemens P1, P2, and P3 panelboards. The line side bolts directly to the panel bus, which is why it does not include line-side lugs.
What does the B suffix in the LGB3B070B catalog number indicate?
The B suffix indicates that the breaker is configured for panelboard mounting with load-side lugs only. The line side is designed to bolt directly to the panelboard bus.
Is the LGB3B070B suitable for reverse feed applications?
Yes, this breaker is suitable for reverse feed applications, allowing it to be back-fed when used as a main breaker or in specific generator setups.
What is the difference between the LGB frame and other Siemens GB frames?
The LGB frame is part of the Siemens Sentron GB/GG frame family. The L designation indicates a higher interrupting capacity at 480V (65kAIC) compared to standard NGB (25kAIC) or HGB (35kAIC) frames in the same physical footprint.
What wire sizes are accepted by the load-side lugs?
The factory-installed load-side lugs (lug kit TC1GG20) accept 8 to 1/0 AWG copper wire or 8 to 2/0 AWG aluminum wire.
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