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Siemens GFCI Load Center 1125-40 - Bubbles Supply

Siemens GFCI Load Center 1125-40

Part #: W0408ML1125-40

$196.21
In stock β€” ships today
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πŸ”’ Secure checkout↩️ 30-day returnsβœ… 1-year warranty
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About this gfci/breaker

The Siemens 1125-40 GFCI Load Center is a weatherproof electrical distribution panel designed for spa and hot tub installations requiring ground fault circuit interrupter protection. This 4/8 configuration load center includes an integrated ground bar and accommodates standard circuit breakers, making it ideal for outdoor spa electrical systems where safety and weather resistance are critical.

Built to Siemens' commercial standards, this load center delivers reliable GFCI protection for your spa's electrical components. At Bubbles Supply, we guarantee this is the exact fit replacement part with same-day shipping on in-stock items and back every part with our 1-year warranty. Professional installation by a licensed electrician is required for all electrical load centers to ensure proper grounding, code compliance, and safe operation of your spa system.

Exact part number

W0408ML1125-40

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • GFCI Load Center 1125-40
  • Siemens 1125-40
  • Spa Panel 1125-40
  • W0408ML1125-40

Looking for an older part number? Check our supersession lookup tool

Technical specifications

Voltage
240V
Amperage
40A

Common symptoms this part fixes

If your spa is showing any of these signs, this part is likely your fix:

  • No power reaching spa or hot tub
  • GFCI tripping repeatedly on existing panel
  • Weathered or corroded load center housing
  • Breaker panel damaged by water intrusion
  • Failed or non-resettable GFCI protection at the panel
  • Spa failing electrical inspection due to non-compliant panel

Not sure if this is your problem? Try our diagnostic centre or .

Before you buy β€” quick checklist

  • Confirm your spa's total amperage draw does not exceed 40A
  • Verify your service run is 240V β€” this panel is not rated for 120V-only installations
  • Count your required circuit breaker slots β€” this is a 4-space/8-circuit configuration
  • Check local electrical code for any jurisdiction-specific GFCI panel requirements before ordering
  • Confirm the existing panel knockouts and conduit entry points match your current wiring run layout
  • Have a licensed electrician review the installation before purchasing if you are unsure of load requirements

Reading the checklist now prevents 90% of returns. Worth the 60 seconds.

Install difficulty: Hard β€” Technician recommendedTypically 2–4 hours (licensed electrician required)

What's in the box

  • Siemens 1125-40 GFCI load center enclosure
  • Integrated ground bar
  • Neutral bar
  • Mounting hardware

If your order is missing any items listed above, contact hello@bubblessupply.com within 48 hours of delivery.

Warranty

1 year manufacturer warranty against defects

Covers manufacturing defects. Does not cover improper installation, normal wear, or accidental damage.

Warranty claims: warranty@bubblessupply.com

Perfect Fit Guarantee

Ordered with our help and the part doesn't fit? Contact us before installation. We'll resolve it with an exchange, replacement recommendation, or return approval.

Learn about our Perfect Fit Guarantee β†’

Shipping

We ship across the US and Canada. US orders ship from our US warehouse to US customers; Canadian orders ship from our Canadian warehouse to Canadian customers β€” no cross-border shipping, no surprise duties. In-stock orders placed before 3pm CT ship same day. Standard shipping $9.95 flat rate. Free shipping on orders over $200. Express options available at checkout.

Returns

30-day hassle-free returns on unused parts in original packaging. Contact us before returning to receive your RMA number.

Frequently asked questions

Check the Compatibility section above to confirm fitment for your spa brand and model. If your model is not listed, use our fitment selector at /pages/find-my-part or ask our parts AI for a personalized recommendation.

In-stock orders placed before 3pm CT ship the same day. You will receive tracking information by email as soon as your order ships.

We accept returns within 30 days of delivery for unused items in original packaging. Email returns@bubblessupply.com with your order number to start a return. Installed electrical parts cannot be returned for safety reasons.

Yes, all new parts come with a 1-year warranty against manufacturing defects. Warranty does not cover damage from improper installation or normal wear and tear.

Customer reviews

AI Fitment Assistant

Tell us your spa model and we will confirm this part fits before you buy.

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