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30 Amp Fuse MDA-30-R - Bubbles Supply

30 Amp Fuse MDA-30-R

Part #: MDA-30-R

$2.84
In stock — ships today
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1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this fuse

The Allied Innovations 30 Amp Fuse MDA-30-R is a critical electrical protection component designed for spa and hot tub control systems. This Bussman-type fuse provides reliable 30-amp circuit protection for higher-power spa equipment including pumps, heaters, and blowers in residential and commercial hot tub installations.

Built to OEM specifications, this fuse delivers the exact amperage rating and response time your spa's electrical system requires. At Bubbles Supply, we guarantee an exact fit for your spa's control panel with same-day shipping on orders placed before cutoff. Every fuse comes backed by our comprehensive 1-year warranty for complete peace of mind. Always ensure power is completely disconnected at the breaker before replacing any spa electrical components, and verify the amperage rating matches your equipment specifications exactly.

Exact part number

MDA-30-R

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 30A ceramic fuse
  • Bussmann MDA-30
  • MDA-30
  • MDA30
  • slow-blow 30 amp fuse

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

Technical specifications

Amperage
30A

Common symptoms this part fixes

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

  • Spa completely dead after power surge or overcurrent event
  • Control panel has no power but breaker is not tripped
  • Pump or heater circuit not responding despite good breaker
  • Spa loses power intermittently under load
  • Board shows no signs of life after electrical fault

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

Before you buy — quick checklist

  • Confirm the blown fuse reads MDA-30 or MDA-30-R printed on the fuse body — do not replace with a different amperage rating
  • Verify this is a slow-blow (time-delay) ceramic fuse, not a fast-blow glass fuse — the MDA series is slow-blow
  • Inspect the fuse holder and fuse clips for heat damage or corrosion before installing a new fuse
  • Identify the root cause of the blown fuse before replacing — a fuse that blows again immediately indicates a deeper fault in the pump, heater, or wiring
  • Check your control board documentation or service manual to confirm MDA-30-R is the correct fuse for your specific board location

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

Install difficulty: Easy — DIY-friendlyTypically 5-15 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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