
- Brand: Siemens
- Part #: SNW2040B1125
Siemens SNW2040B1125 125-Amp 20-Space 40-Circuit 120/240V Outdoor Main Breaker Load Center – NEMA 3R
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Siemens SNW2040B1125 125-Amp 20-Space 40-Circuit 120/240V Outdoor Main Breaker Load Center – NEMA 3R
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Product Details
Description
The Siemens SNW2040B1125 SN Series Main Breaker Load Center provides reliable electrical distribution for residential and light commercial applications. Designed for 120/240V single-phase systems, this 125-amp panel features 20 breaker spaces supporting up to 40 circuits, a factory-installed main breaker, and a plug-on neutral design.
The NEMA 3R weather-resistant enclosure is designed for outdoor installations, while the aluminum bus and plug-on neutral configuration provide a practical solution for modern electrical distribution systems.
Specifications
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Manufacturer: Siemens
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Part Number: SNW2040B1125
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Series: SN Series
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Product Type: Main Breaker Load Center
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Main Breaker Rating: 125 Amps
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Voltage Rating: 120/240V AC
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Phase: Single-Phase
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Wire Configuration: 3-Wire
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Number of Spaces: 20
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Maximum Circuits: 40
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Interrupting Rating: 22 kAIC (Factory-Installed Main Breaker)
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Bus Material: Aluminum
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Neutral Configuration: Plug-On Neutral
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Enclosure Rating: NEMA 3R
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Installation Location: Outdoor
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Enclosure Dimensions: 27" H × 14.5" W × 4.25" D
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Color: Gray
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Mounting: Surface Mount
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UPC: 804766705847
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Condition: New
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Anticipated Shipping Weight: Approximately 31 lb
Features
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Factory-installed 125-amp main breaker for primary circuit protection
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20 full-size breaker spaces supporting up to 40 circuits
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Plug-on neutral design simplifies installation of compatible AFCI and GFCI breakers
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NEMA 3R outdoor-rated enclosure provides protection against rain and environmental exposure when properly installed
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Aluminum bus construction
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Suitable for use as service equipment when installed in accordance with applicable requirements
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Designed for Siemens-approved circuit breakers
Applications
Suitable for residential electrical distribution, outdoor service equipment installations, garages, workshops, detached structures, and light commercial applications requiring a 125-amp main breaker panel.
Installation Notes
Installation must comply with applicable electrical codes and manufacturer instructions. Verify breaker compatibility, conductor sizing, grounding and bonding requirements, and utility specifications before installation.
Branch circuit breakers are sold separately unless otherwise specified.
Customer Reviews
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Yes. We are an authorized dealer of the products we sell, so you can purchase with confidence knowing you’re receiving a genuine, authentic product backed by the manufacturer’s applicable warranty.
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Most in-stock orders are processed within 1–3 business days. Standard shipping typically takes 1–5 business days, depending on your location.
Can I return this product?
Yes. Most products can be returned within 30 days of your order date, provided they are new and unused. Some exclusions and conditions apply. Please review our Return Policy for complete details.
Are there restocking fees?
Yes. A 30% restocking fee applies to eligible returns. Original shipping charges are non-refundable, and customers are responsible for return shipping costs. The restocking fee can be waived with a new order.
Is this product UL Listed or ETL Listed?
Certifications vary by product. Please review the product specifications or contact us to confirm certification details.
Does this item include a manufacturer warranty?
Most products are covered by the manufacturer's warranty. Warranty terms and coverage vary by brand and product.
Do you offer contractor pricing?
Yes. All products already include contractor pricing. Select a multi-pack option to save up to 10%. Your discount is automatically applied when you choose a qualifying multi-pack quantity.
Can I request bulk pricing?
Yes. Use the Add to Quote option on any product page to request a custom quote, or contact us directly for volume pricing and project-specific quotes.
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Shipping Information
Orders ship in 1-3 business days with tracking provided within 72 hours. Shipping Policy
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Returns & Exchanges
Non-defective items may be returned within 30 days with a 30% restocking fee waived when you place a replacement order. Shipping costs are non-refundable, and return shipping is the customer’s responsibility. Return Policy
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