Miniature Circuit Breaker · 1 Pole 1A B Curve 5kA at 277VAC/125VDC · UL 1077 Supplementary Protector · Noark Electrical B1E1B1
What this product is for
The Noark B1E1B1 is a UL 1077 miniature circuit breaker for supplementary protection of control panels, lighting circuits, business equipment, and other low-current loads. It is a 1-pole, 1A breaker in the B1E family with a B-curve trip characteristic and a 5kA interrupting rating at 277VAC.
Use for
Use this breaker where the equipment design calls for a 1A supplementary protector on 277VAC or 125VDC circuits. It is commonly used on DIN rail in industrial control panels, OEM equipment, and commercial control assemblies where a compact thermal-magnetic breaker is preferred.
As typical guidance, B-curve breakers trip faster on low inrush loads than C-curve models, which can help on sensitive electronic or control circuits. Actual performance depends on load profile, available fault current, and coordination with upstream protection.
Avoid for
Avoid using this device where branch-circuit protection is required unless the equipment design and code requirements specifically permit a UL 1077 supplementary protector. For feeder or branch protection, electricians typically specify a UL 489 breaker instead.
Best for
Best for panel builders, maintenance electricians, and OEMs needing a compact 1-pole breaker for supplementary protection with DIN rail mounting, box lug terminations, and a narrow 0.71 in (18 mm) module width.
Installed in
Installed in control cabinets, machinery panels, lighting control assemblies, and commercial equipment enclosures using standard 35 mm DIN rail.
Why this product exists
This breaker provides local overload and short-circuit supplementary protection for individual circuits inside equipment, helping isolate faults without using larger branch breakers for every small control load. Its 1A rating suits low-current circuits where tighter protection is needed.
Compared with similar products
Compared with Noark B1H or B1N series breakers, the B1E series is intended for UL 1077 supplementary protection rather than UL 489 branch-circuit protection. Compared with a C-curve breaker, this B-curve model is typically chosen for lower inrush applications.
Specifications
- Manufacturer: Noark Electrical
- Manufacturer part number: B1E1B1
- Series: B1E
- Product type: Miniature circuit breaker / supplementary protector
- Certification standard: UL 1077
- Poles: 1
- Rated current: 1A
- Trip curve: B curve
- Rated voltage: 277VAC / 125VDC
- Interrupting rating: 5kA at 277VAC; 10kA at 60VDC
- Mounting: 35 mm DIN rail
- Module width: 0.71 in (18 mm) per pole
- Connection type: Box lug
- Conductor range: #18 to #4 AWG (0.75 to 25 mm²)
- Frequency: 50/60 Hz
- Rated impulse voltage: 6 kV
- Rated insulation voltage: 500 V
- Degree of protection: IP20
Selection note: a 1A supplementary protector is commonly used for control wiring and small auxiliary loads, not general receptacle or branch-circuit protection. Confirm SCCR, upstream device coordination, and enclosure design before ordering.
- Poles1 Pole
- Amp1
- Rated Voltage (DC)125Vdc
- Rated voltage (AC)277Vac
- MountingDIN Rail
- Tripping curveB Curve
- Compliant with standard(s)UL1077
CSA C22.2 No.235
UL Recognized for use in the United States in accordance with NFPA70 (NEC)
UL1077 (file number E355391)
IEC60947-2
CE marked
RoHS compliant - Application typeSupplementary Protection
- Control circuits
- Lighting
- Business equipment
- Appliances - BrandNoark Electrical
- Warranty5 year
Minimum Order $20
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Standard Shipping-Free on orders over $249 in Metropolitan Areas / $499 in Rural Areas
(All Other Accounts)
Standard Shipping-Free on orders over $499
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Burnaby Warehouse 5608 Goring St Burnaby, V5B 3A3, BC
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.