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20 Amp Fuse Holder 12-3021 - Bubbles Supply

20 Amp Fuse Holder 12-3021

Part #: 12-3021

$2.55
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 20 Amp Fuse Holder (part #12-3021) is a critical electrical safety component designed for spa and hot tub control systems. This Bussman-style fuse holder protects your spa's electrical circuits by housing 20-amp fuses that prevent dangerous overcurrent conditions in pumps, heaters, and control equipment.

Built to OEM specifications, this replacement fuse holder ensures reliable electrical protection for years of safe spa operation. At Bubbles Supply, we guarantee an exact fit for your system and offer same-day shipping on in-stock items, plus our comprehensive 1-year warranty for complete peace of mind. Always turn off power at the breaker before replacing electrical components, and verify the 20-amp rating matches your spa's requirements.

Exact part number

12-3021

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 20A inline fuse holder
  • Bussmann-style fuse holder
  • hot tub fuse holder
  • spa fuse holder

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

Technical specifications

Amperage
20A

Common symptoms this part fixes

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

  • Spa has no power after a tripped or blown fuse event
  • Fuse blows repeatedly due to a damaged or loose holder
  • Burned or melted fuse holder causing intermittent power loss
  • Spa control board losing power unexpectedly
  • Visible corrosion or heat damage on existing fuse holder

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

Before you buy — quick checklist

  • Confirm your spa's circuit calls for a 20-amp fuse — do not upsize fuse ratings without verifying circuit design
  • Inspect the existing holder's wiring connections and confirm lead gauge compatibility before ordering
  • Verify this is an Allied Innovations OEM application — cross-reference part number 12-3021 on your control box label or wiring diagram
  • Turn off power at the breaker and discharge any capacitors before removing the old holder
  • Check whether the fuse itself also needs replacement — a damaged holder often damages the fuse too

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

Install difficulty: Medium — Some experience neededTypically 20–45 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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