Siemens LGB3K090B Molded Case Circuit Breaker
- 90A
- 3 Pole
- Bolt-On
Quantity
Siemens LGB3K090B - 90A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Built for heavy-duty applications, this 90-amp, 3-pole molded case circuit breaker delivers long-time and instantaneous trip functions. It is designed to fit Siemens P1, P2, and P3 panelboards, offering a dependable bolt-on connection. For facility managers updating older systems, note that this unit is replaced by the 3VA5190-6ED31-0AA0, which requires a mounting strap kit. It boasts a high interrupting capacity of 65kA at 480Y/277V and includes load side lugs.Specifications
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 90A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 600Y/347VAC, 125/250VDC |
| Phase | 3 |
| 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 | 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, 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 | CSA, IEC, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated |
Product FAQs
5 answersWhich panelboards are compatible with the Siemens LGB3K090B?
This GB frame breaker is designed for bolt-on installation in Siemens P1, P2, and P3 panelboards.
What is the difference between Siemens NGB, HGB, and LGB circuit breakers?
They share the same physical GB frame and panelboard compatibility but differ in their interrupting ratings. The LGB series provides the highest interrupting capacity of the three, rated up to 100kA at 240VAC and 65kA at 480VAC.
Is the Siemens LGB3K090B suitable for DC applications?
Yes, this thermal magnetic breaker is rated for 125/250VDC systems with a maximum interrupting capacity of 14kAIC.
Is the LGB3K090B HACR rated?
Yes, this breaker is HACR rated, making it suitable for group motor applications in heating, air conditioning, and refrigeration equipment.
Are the lugs on the LGB3K090B rated for both copper and aluminum wire?
Yes, the factory-installed lugs are dual-rated for 8 to 1/0 AWG copper (Cu) and 8 to 2/0 AWG aluminum (Al) conductors.
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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.