🚀 New launch promo — 10% off orders over $300. Use code LAUNCH10
Bubbles Supply
Not sure which part you need? Upload a photo and we'll find it. →
3/4Amp Fast Blow Fuse GMA-750-R - Bubbles Supply

3/4Amp Fast Blow Fuse GMA-750-R

Part #: GMA-750-R

$1.74
In stock — ships today
Qty
🔒 Secure checkout↩️ 30-day returns✅ 1-year warranty
Add to B2B order list

Not sure this fits?

Send us a photo of your old part — we'll confirm the right replacement before you order.

Upload a Photo
1-year warrantySame-day ship before 3pm CTPerfect Fit Guarantee30-day returns

About this fuse

The Allied Innovations GMA-750-R is a 3/4 amp fast blow fuse designed for spa electrical systems requiring precise overcurrent protection. This OEM replacement fuse fits various spa control systems and circuit boards where fast-acting protection is critical to prevent damage from electrical surges or component failures.

Built to GMA standard specifications, this fast blow fuse provides reliable circuit protection by quickly interrupting current flow when amperage exceeds 0.75 amps. At Bubbles Supply, we guarantee an exact fit for your spa's electrical requirements and offer same-day shipping on all in-stock fuses. Every Allied Innovations fuse comes with our comprehensive 1-year warranty for complete peace of mind. Always verify the correct amperage rating on your spa's wiring diagram or existing fuse before installation, and ensure power is completely disconnected before replacing any electrical components.

Exact part number

GMA-750-R

Save this for ordering or warranty claims

Also known as / Replaces

This part replaces or is interchangeable with:

  • 0.75 amp glass fuse
  • 3/4A fast blow fuse
  • GMA 750mA fuse
  • GMA-3/4A

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

Technical specifications

Amperage
0.75A (750mA)

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
  • Circuit board not responding after electrical surge
  • Specific board function (e.g., lighting, auxiliary output) stopped working
  • Fuse visibly blown, discolored, or wire inside glass tube is broken
  • Spa dead after a tripped breaker or power event

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

Before you buy — quick checklist

  • Confirm the blown fuse on your board reads 3/4A or 750mA — amperage is printed on the fuse cap or glass body
  • Confirm the fuse is GMA style (5mm x 20mm glass tube) not AGC or ATO format
  • Verify it is rated fast-blow (F) not slow-blow (T) — substituting slow-blow in a fast-blow position can damage the board
  • Inspect the circuit board for additional damage (burnt traces, scorched components) before replacing the fuse alone
  • Always disconnect power at the breaker before handling any board-level fuse

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.

🔒 Secure checkout · SSL encrypted·🇺🇸🇨🇦 Serving the US and Canada·↩️ 30-day hassle-free returns·📦 Same-day fulfillment