Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Siemens LGB2B050B Molded Case Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
Siemens
LGB2B050B
Molded Case Circuit Breaker
Brand
Siemens
SKU
LGB2B050B
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens LGB2B050B - 50A 2 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
60A 2 Pole Molded Case Circuit Breaker
40A 2 Pole Molded Case Circuit Breaker
35A 2 Pole Molded Case Circuit Breaker
Description
Engineered for commercial distribution, the Siemens LGB2B050B is a 2-pole, 50A molded case circuit breaker. It utilizes a fixed thermal-magnetic trip mechanism to deliver consistent long-time and instantaneous overcurrent protection. This bolt-on breaker mounts into Siemens P1, P2, and P3 panelboards. It serves as a direct predecessor to the 3VA5150-6ED21-0AA0 replacement model. Delivering 100kAIC at 240V and 65kAIC at 480Y/277V, this HACR-rated unit supports reverse feed applications.Specifications
| Brand | Siemens |
|---|---|
| Part Number | LGB2B050B |
| Series | LGB |
| Amperage | 50A |
| 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 |
| 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, Low Tab, Non-Interchangeable Trip, Trip-Free Mechanism |
Product FAQs
6 answersWhich Siemens panelboards accept the LGB2B050B breaker?
This bolt-on breaker is designed specifically for installation in Siemens P1, P2, and P3 commercial and industrial panelboards.
Can the LGB2B050B be used in DC circuits?
Yes, this breaker is rated for DC applications up to 125/250V DC, providing an interrupting capacity of 14kA.
Will this breaker fit in a standard residential load center?
No. The LGB2B050B is a bolt-on molded case circuit breaker built for commercial panelboards. It is not compatible with standard residential plug-on load centers.
What does the LI trip function mean for this model?
The LI designation indicates a thermal-magnetic trip unit that provides Long-Time (L) overload protection and Instantaneous (I) short-circuit protection. Both the thermal and magnetic trip points are fixed on this specific frame.
How does this breaker connect to the power source?
It utilizes a bolt-on connection to attach directly to the panelboard bus bars on the line side, while the load side features standard mechanical lugs for wire termination.
Does this breaker mount onto a standard DIN rail?
No, it is designed specifically to bolt onto the chassis of compatible Siemens panelboards and does not support standard DIN rail mounting.
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.