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1.25 Amp Slo Blo Fuse MDA-114 - Bubbles Supply

1.25 Amp Slo Blo Fuse MDA-114

Part #: MDA-114

$3.44
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this fuse

The Allied Innovations MDA-114 is a 1.25 amp slow-blow fuse designed for spa and hot tub electrical systems. This OEM replacement fuse provides reliable overcurrent protection for control boards, pumps, and other electrical components in most spa brands. The slow-blow design allows for brief power surges during motor startup while still protecting against sustained overloads that could damage sensitive electronics.

Built to Allied Innovations' OEM specifications, this MDA-style fuse delivers the exact fit and performance your spa requires. We guarantee precise fitment and back every fuse with our 1-year warranty for complete confidence in your repair. Orders ship same-day from our Canadian warehouse to get your spa running quickly. Always verify the amp rating on your original fuse before installation to ensure proper electrical protection for your spa's control system.

Exact part number

MDA-114

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 1-1/4 amp slo-blo fuse
  • ceramic slow-blow fuse
  • MDA 1.25A
  • MDA type fuse
  • MDA1.25

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

Technical specifications

Amperage
1.25A

Common symptoms this part fixes

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

  • Spa control board has no power
  • Spa is completely dead after a surge or short
  • Heater or pump circuit not responding
  • Control board fuse visibly blown or discolored
  • Spa trips off intermittently and won't reset

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

Before you buy — quick checklist

  • Read the amp rating printed on your existing fuse before ordering — do not guess
  • Confirm the fuse type is MDA (slow-blow), not MDL (fast-blow) — they are not interchangeable
  • Inspect the fuse holder and board for burn marks or corrosion before installing a replacement
  • Investigate why the fuse blew — replacing it without fixing the root cause will blow the new fuse too
  • Verify physical fuse size matches (MDA standard is 5x20mm or 3AG — confirm with your original)

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

Install difficulty: Easy — DIY-friendlyTypically 5-10 minutes

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 →

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 — 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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