Siemens SN4040L1125 125A 120/240V 40‑Space Main Lug Load Center – 100 kA AIC

The Siemens SN4040L1125 is a 125 Amp, 120/240 V, 1‑phase main lug load center with 40 spaces for branch circuits. Built for residential and light commercial electrical distribution, it accepts plug‑on neutral breakers for faster installation. The panel features a durable aluminum bus and a NEMA 1 indoor enclosure. It’s rated for 100 kA interrupting capacity, providing dependable short-circuit safety for typical residential and contractor applications.

Key Features

• 125 A main lug rating

• 120/240 VAC, 1‑phase, 3‑wire

• 40 circuit spaces

• Accepts plug‑on neutral breakers

• 100 kAIC interrupting rating

• Aluminum bus bar

• Indoor NEMA 1 enclosure

Technical Specifications

• Brand: Siemens

• Model: SN4040L1125

• Type: Main Lug Load Center

• Amperage: 125 A

• Voltage: 120/240 VAC

• Phase: Single‑phase (3‑wire)

• Number of Spaces: 40

• Interrupting Rating: 100 kAIC

• Bus Material: Aluminum

• Enclosure: NEMA 1, indoor

• UPC: 804766703485

• GTIN: 00804766703485

Returns are easy

You may return items within 30 days of delivery for a refund.

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My Circuit Breakers provides a comprehensive 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer). Extended warranties are available upon request.