Siemens BQ2B050QLD Molded Case Circuit Breaker
- 50A
- 2 Pole
- DIN Rail
Siemens
BQ2B050QLD
Molded Case Circuit Breaker
Brand
Siemens
SKU
BQ2B050QLD
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens BQ2B050QLD - 50A 2 Pole Molded Case Circuit Breaker
New
Quantity
Similar Items
50A 2 Pole Molded Case Circuit Breaker
50A 2 Pole Molded Case Circuit Breaker
Description
Providing versatile circuit protection, the Siemens BQ2B050QLD is a 2-pole, 50A molded case circuit breaker. It utilizes thermal-magnetic technology to safeguard commercial systems against overloads. Unlike standard breakers, this model features a DIN rail mounting style for OEM panels and enclosures. It comes factory-equipped with line and load side lugs, accepting 8-1 AWG copper wire. This breaker carries a 10 kAIC rating at 120/240VAC. It is HACR rated and meets UL 489 safety standards.Specifications
| Brand | Siemens |
|---|---|
| Series | BQ |
| Amperage | 50A |
| Poles | 2 |
| Mounting Style | DIN Rail |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | BQ |
|---|---|
| Terminal Type | Lugs |
| For Use With | DIN Rail Enclosures, OEM Panels |
| Wire Gauge | 8-1 AWG (Cu), 6-1/0 AWG (Al) |
| Max Wire | 1 AWG (Cu), 1/0 AWG (Al) |
| Min Wire | 8 AWG (Cu), 6 AWG (Al) |
| 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, Padlock Attachment |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
Product FAQs
6 answersHow is the Siemens BQ2B050QLD mounted?
Unlike standard bolt-on BQ series breakers, the QLD suffix indicates this model is configured specifically for DIN rail mounting. It snaps directly onto a standard 35mm DIN rail inside control panels or OEM enclosures.
Are line and load lugs included with the BQ2B050QLD?
Yes, this DIN rail-mounted breaker comes factory-equipped with both line and load side lugs, allowing for direct wire termination without requiring a separate busbar connection.
What wire gauges are compatible with the terminals on this 50A breaker?
The integrated lugs accept 8 to 1 AWG copper conductors or 6 to 1/0 AWG aluminum conductors. Ensure proper torque specifications are followed during installation.
Can I use the BQ2B050QLD in a standard Siemens panelboard?
No. Standard Siemens panelboards require plug-on or bolt-on breakers. Because this model features a DIN rail mount and line-side lugs, it is intended for standalone DIN rail enclosures and industrial control panels.
What does the LI trip function code mean for this breaker?
The LI designation means the breaker provides Long-Time (thermal) protection against overloads and Instantaneous (magnetic) protection against short circuits. Both trip settings are fixed.
What does the QLD suffix indicate on the BQ2B050QLD catalog number?
In the Siemens BQ series, the QLD suffix designates that the breaker is modified for DIN rail mounting and includes both line and load side lugs, differentiating it from standard bolt-on BQ breakers.
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 4.9 out of 5 based on 74 reviews.
Reviews Summary
Generated by AI from 67 most recent customer reviews
Last updated 6/3/26
Customers say these breakers arrive quickly and fit perfectly for their electrical needs. Fast shipping and competitive pricing are frequently mentioned, with many users appreciating the availability of hard-to-find and older-style breakers. The products are well-packaged and arrive in good condition. Most customers report successful installations and reliable performance. A few note missing items from orders or concerns about product condition, though the majority express satisfaction with their purchases and indicate they would order again.
Search
Rating
74 reviews
- DVDavid V. O.Verified BuyerReviewingSiemens BQ3B030H - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/3/26Electrician
Came
fast
- HSHector S.Verified BuyerReviewingSiemens BQ3B100H - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/27/26Perfect replacement
Fit perfectly and good price
- AFAnthony F.Verified BuyerReviewingSiemens BQ2B020 - 20A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/25/26works as expected
works as expected
- MSMike S.Verified BuyerReviewingEaton / Cutler-Hammer BQ250250 - 50/50A Quadplex Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/12/26Electrical company
Breaker worked awesome thank you very much
- PEPhilip E.Verified BuyerReviewingSiemens BQ3B020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/10/26Siemens BQ3B020
The breaker arrived as described and on time. It works as expected. I will order from SuperBreakers again in the future without hesitation.