Siemens LGB3K080B Molded Case Circuit Breaker
- 80A
- 3 Pole
- Bolt-On
Quantity
Siemens LGB3K080B - 80A 3 Pole Molded Case Circuit Breaker
New
Quantity
Description
Rated for commercial and industrial power distribution, this 80-amp, 3-pole molded case circuit breaker provides reliable thermal-magnetic protection. It mounts into Siemens P1, P2, and P3 panelboards, utilizing a secure bolt-on connection for stable performance. As a legacy GB frame unit, it is officially replaced by the 3VA4180-6ED34-0AA0, which requires an adapter kit. The breaker features a 65kAIC rating at 480Y/277V and is HACR rated for HVAC equipment.Specifications
| Brand | Siemens |
|---|---|
| Series | LGB |
| Amperage | 80A |
| 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 Side Lugs |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
6 answersWhich panelboards are compatible with the LGB3K080B circuit breaker?
This bolt-on breaker is designed for use in Siemens P1, P2, and P3 panelboards. It fits within the standard GB and GG frame footprints.
What wire sizes are accepted by the lugs on this breaker?
The terminals accept 8 AWG to 1/0 AWG copper wire, or 8 AWG to 2/0 AWG aluminum wire. Ensure proper torque specifications are followed during installation.
Can the LGB3K080B be used in DC voltage applications?
Yes, this breaker is rated for DC applications up to 125/250VDC, providing an interrupting capacity of 14kA at those voltage levels.
What does the fixed thermal magnetic LI trip function indicate?
The LI designation means the breaker provides Long-Time (L) protection for standard overloads and Instantaneous (I) protection for short circuits. Both the thermal and magnetic trip points are fixed and cannot be adjusted in the field.
Does this breaker require a specific mounting hardware kit?
As a bolt-on breaker for Siemens panelboards, it typically mounts directly to the bus bar using standard panelboard hardware. Verify your specific P1, P2, or P3 panelboard configuration for any required strap kits.
What safety precautions should be taken before installing this breaker?
Installation should only be performed by a licensed electrician. Always de-energize the panelboard, verify power is off with a properly rated voltage tester, and follow all local electrical codes and OSHA lockout/tagout procedures.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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.